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Paeony = Paeonia spp. (PEONY) -- II 204

Painted-cup = Castilleja coccinea (PAINTED CUP) -- V 127, 129, 157, 220, 346, VIII 358

Palm = (225) -- i 18, 178, 282, 409, I 17, 365, II 147, III 177, IV 35

Panax quinquefolius (GINSENG) -- IX 71, 80, XI 6

Panax trifolius (DWARF GINSENG) -- VIII 387, IX 80

Panic = 226 -- XII 293, XIII 382

Panic Grass = 226 -- XII (224), XIII 311

Panic Grass (Broad-leaved) = Panicum latifolium (BROAD-LEAVED PANIC GRASS) -- XI 103

Panic Grass (Glaucous) = Setaria glauca (YELLOW FOXTAIL) -- XI 124

Panic Grass (Purple) = Digitaria sanguinalis (HAIRY CRAB-GRASS) -- XI 145

Panicum agrostoides (RED-TOP PANIC GRASS) -- XI 146, XII 304

Panicum capillare (OLD WITCH GRASS) 227 -- XI 145, XII 293, XIV 53

Panicum clandestinum (DEER-TONGUE GRASS) 228 -- XI 141, 150, 232, 240

Panicum crus-galli = Echinocloa spp. (ECHINOCLOA) -- XI 157, 182, XIII 408

Panicum filiforme = Digitaria filiformis (SLENDER CRAB-GRASS) -- XI 149, 156, 181

Panicum glabrum = Digitaria ischaemum (SMOOTH CRAB-GRASS) -- XIV 53

Panicum latifolium (BROAD-LEAVED PANIC GRASS) 229 -- X 509, XI 69, XII 201, XIII 377

Panicum oligosanthes (FEW-FLOWERED PANIC GRASS) -- see Panicum clandestinum

Panicum sanguinale = Digitaria sanguinalis (HAIRY CRAB-GRASS) -- XI 145, 149, 156, 181, XII 293, XIV 53

Panicum spretum (EATON'S PANIC GRASS) -- see Panicum clandestinum

Panicum virgatum (SWITCHGRASS) -- XI 150, XII 205, 292, XIII 24

Pansy = Viola spp. (VIOLET) (esp. Viola tricolor (PANSY)) -- i 233, 235, I 178, 180

Parietaria = Parietaria pensylvanica (COMMON PELLITORY) -- VI 391, VIII 442

Parietaria pensylvanica (COMMON PELLITORY) -- V 312

Parmelia = a lichen

Paronychia canadensis (FORKED CHICKWEED) -- see Anychia, Anychia dichotoma, Queria

Parsnip = Pastinaca sativa (WILD PARSNIP) -- III 362, IV 79, 194, V 311, VI 381, VIII 468, XIII 40

Parsnip (Water) = Sium suave (WATER PARSNIP) 230 -- IV 203, 234, 291, 353

Parsnip (Wild) = Cicuta maculata (WATER HEMLOCK, SPOTTED COWBANE) -- II 53

Parthenocissus spp. (CREEPER) -- see Ampelopsis

Parthenocissus inserta (THICKET CREEPER) -- see Ampelopsis quinquefolia, Creeper (Common), Woodbine

Parthenocissus quinquefolia (VIRGINIA CREEPER) 231 -- see Ampelopsis quinquefolia, Creeper (Common), Woodbine

Partridgeberry = Mitchella repens (PARTRIDGEBERRY) -- II 104, 224, III 89, 128,, V 343, 521

PARTRIDGE PEA = Cassia fasciculata

Paspalum = Paspalum ciliatifolium (CILIATE-LEAVED PASPALUM) -- XI 114, XIV 58

Paspalum ciliatifolium (CILIATE-LEAVED PASPALUM) -- VI 438, 447, XI 124

Paspalum setaceum = Paspalum ciliatifolium (CILIATE-LEAVED PASPALUM) -- XI 124

PASQUE-FLOWER = Anemone patens

Pastinaca sativa (WILD PARSNIP) -- IV 194

Pea (Beach) = Lathyrus japonicus (BEACH PEA) -- VII 433, 440, VIII 389, IX 415

Peach = Prunus persica (PEACH) -- V 116, VII 359, 378, VIII 321, 336, X 37, 395, 420, XI 155, 243, XII 133

Peanut (Hog) = Amphicarpa bracteata (HOG-PEANUT) -- V 432

Pear = Pyrus communis (COMMON PEAR) = i 183, II 55, 365, 366, III 316, V 134, 147, 421, VI 181, 235, 264, 298, VII 52, 351, 379, 476, 504, IX 369, X 420, XI 260, XII 319, 382, XIV 72, 112, 113, 114, 298

Pear (Josh) 232 = Amelanchier spp. (SHADBUSH) -- VII 434, IX 452

PEARLWORT (MATTED) = Sagina procumbens

Pearmain (Blue) 233 = Pyrus malus (COMMON APPLE) -- X 155

Pea-vine = Amphicarpa bracteata (HOG-PEANUT) -- XI 221

Pedicularis = Pedicularis canadensis (COMMON LOUSEWORT, WOOD BETONY) -- V 129, 149, VIII 358, IX 371

Pedicularis canadensis (COMMON LOUSEWORT, WOOD BETONY) -- IV 73

Pellitory = Parietaria pensylvanica (COMMON PELLITORY) -- XII 223

Pellitory (American) = Parietaria pensylvanica (COMMON PELLITORY) -- V 312

Peltandra = Peltandra virginica (ARROW ARUM) -- VI 374, VIII 394, XII 323

Peltandra virginica (ARROW ARUM) -- IV 170, 173, 235, V 287, VIII 382

Pennyroyal = Hedeoma pulegioides (AMERICAN PENNYROYAL) -- i 116, I 127, II 12, 61, 104, 123, IV 268, 296, 355, 397, V 24, 350, 355, 357, 358, 369, VI 346, 390, 410, VII 447, VIII 12, 48, 62, 223, 224, 442, 466, IX 25, 167, X 152, XIV 53

Pennywort (Marsh) = Hydrocotyle americana (WATER PENNYWORT) -- IV 311

Penthorum = Penthorum sedoides (DITCH STONECROP) -- VI 394, VIII 435

Penthorum sedoides (DITCH STONECROP) -- IV 243

PEPPERBUSH (SWEET) = Clethra alnifolia

Pepper-grass = Lepidium virginicum (WILD PEPPERGRASS) -- IV 200, V 308, VI 348

Pepperidge = Nyssa sylvatica (BLACK TUPELO) -- II 350, X 9

Peppermint = Mentha piperita (PEPPERMINT) -- V 357, 387, VI 446, IX 33

Persimmon = Diospyros virginiana (PERSIMMON) -- i 353, I 306, VII 50, IX 135

Pertusaria = a lichen

Petty Morel = Aralia racemosa (SPIKENARD) -- IV 286, V 337

Phalaris = Phalaris spp. (CANARY-GRASS) 234 -- V 262, XI 206, 213, XIII 287

Phalaris americana = Phalaris arundinacea (REED CANARY-GRASS) -- XII 205, XIII 363

Phalaris arundinacea (REED CANARY-GRASS) -- XI 145

Phalaris Grass = Phalaris spp. (CANARY-GRASS) 234 -- XI 294, XIII 373

Phaseolus diversifolius = Strophostyles helvola (TRAILING WILD BEAN) -- XI 173

Phaseolus vulgaris (KIDNEY BEAN) -- II 227

Phleum = Phleum pratense (COMMON TIMOTHY) -- VI 344

Phleum pratense (COMMON TIMOTHY) -- see Herd's-grass, Phleum

Phragmites = Phragmites communis (REED) -- VII 42, XIII 374

Phragmites communis (REED) -- see Arundo, Arundo phragmites, Phragmites

Phryma = Phryma leptostachya (LOPSEED) -- IX 66

Phryma leptostachya (LOPSEED) -- IX 79

Phyllodoce caerulea (MOUNTAIN HEATH) -- see Menziesia caerulea, Phyllodoce taxifolia

Phyllodoce taxifolia = Phyllodoce caerulea (MOUNTAIN HEATH) -- XI 21, 24, 60

Phytolacca americana (POKEWEED) -- see Poke, Pokeweed

Phytolacca decandra = Phytolacca americana (POKEWEED) -- IV 239

Picea spp. (SPRUCE) -- see Spruce

Picea abies (NORWAY SPRUCE) -- see Abies excelsa, Spruce (Norway)

Picea glauca (WHITE SPRUCE) -- see Abies alba, Spruce (White)

Picea grandis = Abies grandis (GRAND FIR) -- X 185

Picea mariana (BLACK SPRUCE) -- see Abies nigra, Spruce, Spruce (Black), Spruce (Double), Spruce (Single), Spruce (White)

Picea pectinata = Abies alba (SILVER FIR) -- X 185

Picea rubens (RED SPRUCE) -- see Abies nigra, Spruce, Spruce (Black), Spruce (Double), Spruce (Single), Spruce (White)

Pickerel-weed = Pontederia cordata (PICKERELWEED) -- I 383, II 311, III 28, 379, IV 168, 183, 184, 237, V 223, 337, VI 395, VII 222, VIII 394, 442, 462, X 44, 60, XI 153, XII 267, 324, XIII 357, 425

Pignut = Carya ovalis (SWEET PIGNUT HICKORY)/Carya glabra (PIGNUT HICKORY) 2 -- IV 451, 452, V 6, 471, 473, 482, 487, VI 332, 458, VII 46, 366, X 40, 111, 137, 210, XI 279, XII 364, 382, XIV 274, 277

Pigweed = Chenopodium spp. (GOOSEFOOT) 18 -- II 62, 64, IV 228, 493, VII 117, 178, 183, 438, 445, VIII 81, IX 241, X 289, XI 182, XIII 408, XIV 314

Pilea pumila (CLEARWEED, RICHWEED) -- IV 317

PILEWORT = Erechtites hieracifolia

Pimpernel (False) = Lindernia dubia (FALSE PIMPERNEL)/Lindernia anagallidea (FALSE PIMPERNEL) 2 = IV 208

Pimpernel (Scarlet) = Anagallis arvensis (SCARLET PIMPERNEL) -- VI 487, VII 434

Pinaceae (PINE FAMILY) -- see Coniferae, Pine Family

Pine = Pinus spp. (PINE) -- i 5, 18, 22, 56, 61, 71, 178, 199, 200, 201, 204, 205, 210, 216, 223, 237, 308, 309, 310, 322, 341, 354, 355, 375, 376, 381, 382, 388, 393, 407, 409, 410, 445, 458, 496, I 3, 4, 17, 22, 60, 65, 76, 183, 258, 259, 260, 274, 291, 306, 331, 332, 338, 345, 351, 363, 380, 381, 383, 400, 429, 449, 451, 471, II 10, 24, 29, 31, 34, 41, 42, 86, 87, 90, 104, 106, 119, 121, 128, 138, 139, 167, 181, 196, 198, 200, 206, 225, 239, 250, 264, 266, 279, 304, 331, 382, 411, 425, 446, 464, 476, 477, III 23, 33, 35, 42, 57, 68, 72, 79, 87, 88, 98 105, 130, 131, 132, 136, 146, 152, 162, 163, 169, 173, 197, 205, 218, 228, 229, 246, 254, 276, 277, 279, 290, 301, 302, 356, 393, 397, 402, 405, 429, 435, 449, 450, 456, 458, 466, 478, 479, 481, IV 18, 19, 24, 30, 39, 47, 48, 52, 61, 64, 87, 88, 89, 90, 129, 135, 136, 137, 140, 218, 257, 283, 312, 367, 378, 386, 394, 395, 396, 398, 399, 403, 411, 413, 415, 438, 439, 441, 443, 472, 476, V 30, 50, 74, 94, 117, 126, 133, 150, 155, 156, 159, 167, 169, 187, 195, 201, 202, 221, 233, 239, 251, 252, 254, 281, 285, 298, 343, 384, 387, 416, 432, 447, 477, 484, 490, 501, VI 37, 47, 50, 63, 76, 90, 141, 165, 181, 183, 191, 219, 242, 250, 262, 289, 304, 321, 366, 404, VII 21, 23, 24, 37, 38, 58, 64, 93, 98, 105, 111, 123, 127, 128, 129, 133, 146, 180, 187, 188, 193, 203, 217, 228, 232, 250, 280, 304, 335, 358, 363, 364, 378, 394, 395, 414, 448, 479, 499, 508, VIII 21, 23, 39, 46, 47, 48, 54, 58, 61, 128, 129, 163, 217, 269, 288, 293, 321, 335, 344, 350, 363, 365, 384, 393, 436, IX 8, 23, 32, 125, 151, 169, 171, 172, 173, 182, 191, 240, 266, 267, 294, 297, 315, 332, 348, 368, 369, 373, 413, 421, 436, 437, 438, 450, X 33, 41, 50, 51, 52, 55, 57, 59, 60, 61, 80, 101, 106, 112, 117, 119, 123, 138, 161, 185, 186, 192, 200, 218, 226, 239, 278, 280, 305, 307, 315, 333, 345, 424, 437, 438, XI 165, 189, 198, 201, 222, 235, 236, 260, 266, 271, 284, 290, 302, 305, 341, 343, 352, 353, 362, 365, 367, 368, 369, 371, 377, 380, 393, 412, 449, 450, XII 25, 32, 50, 51, 63, 64, 74, 76, 95, 107, 120, 145, 146, 152, 153, 154, 155, 194, 200, 214, 297, 306, 338, 345, 372, XIII 10, 30, 32, 45, 81, 86, 93, 133, 147, 148, 158, 203, 225, 227, 235, 280, 295, 300, 317, 358, 360, 364, 365, 366, 373, 386, 411, 413, 417, XIV 5, 75, 94, 95, 115, 123, 125, 126, 128, 130, 133, 135, 137, 138, 139, 140, 141, 142, 143, 144, 145, 147, 149, 150, 151, 152, 153, 155, 156, 157, 158, 159, 160, 162, 163, 164, 165, 167, 170, 171, 172, 176, 177, 180, 181, 182, 183, 184, 188, 190, 192, 194, 195, 196, 197, 198, 213, 219, 221, 223, 226, 229, 230, 247, 248, 249, 253, 255, 263, 267, 268, 271, 272, 276, 279, 280, 281, 282, 285, 289, 290, 291, 312, 331

Pine (Broom ) = Pinus australis (LONGLEAF PINE) -- II 198

Pine Family = Pinaceae (PINE FAMILY) -- V 49

Pine (Georgia Pitch) = Pinus australis (LONGLEAF PINE) -- II 198

Pine (Lambert's) = Pinus lambertiana (SUGAR PINE) -- X 185

Pine (Long-leaved) = Pinus australis (LONGLEAF PINE) -- II 198

Pine (New York) = Pinus echinata (SHORTLEAF PINE) -- II 198

Pine (Norway) = Pinus resinosa (RED PINE) -- II 167, 206, VI (255), 299, VII 93, IX 500, XIV 334

Pine (Pitch) = Pinus australis (LONGLEAF PINE) -- II 198

Pine (Pitch) = Pinus rigida (PITCH PINE) -- i 238, 309, I 183, 258, 363, 368, 400, 424, II 31, 32, 41, 89, 90, 128, 199, 233, 265, 269, 276, 301, 303, 365, 396, 453, III 4, 40, 59, 79, 80, 88, 121, 139, (141), 177, 178, 180, 220, 260, 274, 277, 402, 444, 449, 462, IV 61, 81, 100, 113, 132, 281, 319, 322, 397, 399, 401, 418, 424, 439, 442, 459, 465, 475, 489, V 31, 91, 104, 123, 154, 160, 172, 191, (195), 197, 202, 211, 219, 224, 230, 378, VI 27, 28, 88, 91, 122, 141, 143, 216, 220, 253, 255, (256), 280, 289, 299, 310, 327, 459, VII 93, 118, 119, 120, 121, 123, 147, 149, 180, 183, 227, 250, 331, 361, 362, 371, 379, 397, 410, 418, 425, 429, 455, 499, 526, VIII 47, 51, 179, 200, 273, 288, 315, 316, 329, 365, 366, IX 128, 139, 240, 242, 267, 287, 288, 297, 338, 347, 399, X 26, 33, 57, 91, (95), 105, 106, 135, 161, 164, 181, 185, 205, 225, 231, 281, 287, 444, 483, 509, XI 53, 201, 244, 258, 259, 260, 276, 280, 343, 371, 380, 387, 388, 390, 394, XII 25, 108, 185, 394, 453, XIII 5, 33, 95, 116, 147, 203, 204, 247, 328, 335, 364, 366, 411, 416, XIV 126, 127, 134, 140, 145, 147, 158, 160, 161, 162, 164, 167, 170, 171, 172, 175, 176, 179, 181, 187, 191, 192, 193, 194, 195, 196, 200, 201, 203, 205, 206, 212, 221, 222, 223, 225, 235, 238, 240, 247, 251, 253, 254, 255, 258, 268, 269, 270, 271, 272, 276, 279, 280, 323, 325, 336, 340,

Pine (Pumpkin) 237 = Pinus strobus (EASTERN WHITE PINE) III 35, 206, IV 441, V 130, IX 384

Pine (Red) = Pinus australis (LONGLEAF PINE) -- II 198

Pine (Red) = Pinus resinosa (RED PINE) -- II 206

PINE (RUNNING) = Lycopodium complanatum

Pine (Scotch) = Pinus sylvestris (SCOTCH PINE) -- X 185

Pine (Short-leaved) = Pinus echinata (SHORTLEAF PINE) -- II 198

Pine (Southern) = Pinus australis (LONGLEAF PINE) -- II 198, VIII 381

Pine (Spruce) = Pinus echinata (SHORTLEAF PINE) -- II 198, 206

Pine (White) = Pinus strobus (EASTERN WHITE PINE) -- i 200, 211, 216, 309, I 258, II 32, 33, 39, 89, 128, 199, 200, 203, 269, 287, 331, 488, III 6, 31, 40, 80, 92, 93, 100, 105, 109, 128, 129, 131, 141, 144, 160, 166, 172, 185, 227, 277, 280, 302, 452, 456, IV 11, 48, 81, 100, 134, 136, 165, 236, 395, 396, 405, 413, 432, 442, V 6, 18, 74, 103, 120, 126, 138, 160, 169, 172, (195), 197, 232, 233, 236, 238, 281, 384, 427, 435, 530, VI 14, 40, 49, 51, 54, 134, 141, 151, 166, 256, 299, 327, 332, 341, 343, 363, 447, 470, VII 64, 93, 118, 120, (127), 144, 147, 148, 248, 299, 319, 341, 342, 345, 358, 388, 391, 410, 411,, VIII 80, 172, 173, (179), 218, 273, 288, 315, 316, 319, 329, 344, 366, IX 99, 139, 271, 370, 373, 374, 390, 393, 457, 460, 472, 482, 491, 493, X 26, 57, 67, 81, 91, (95), 97, 117, 123, 170, 196, 206, 225, 277, 279, 280, 307, 398, 424, 437, 438, 463, 464, 479, 499, 502, 509, XI 37, 38, 39, 62, 164, 165, 195, 198, 206, 210, 215, 238, 239, 260, 261, 266, 279, 341, 374, 385, 388, XII 27, 63, 119, 127, 128, 146, 152, 163, 184, 188, 333, 383, 385, 441, 445, 447, XIII 10, 30, 89, 93, 114, 162, 175, 203, 227, 232, 285, 298, 304, 317, 318, 335, 359, 360, 366, XIV 26, 56, 106, 115, 125, 127, 131, 134, 141, 145, 148, 156, 160, 162, 163, 164, 165, 166, 170, 171, 175, 176, 179, 181, 187, 190, 192, 193, 195, 196, 197, 200, 206, 207, 209, 210, 212, 218, 219, 220, 221, 223, 225, 226, 229, 240, 244, 247, 253, 257, 258, 267, 268, 269, 271, 272, 276, 279, 280, 307, 323, 340

Pine (Yellow) = Pinus australis (LONGLEAF PINE) -- II 198

Pine (Yellow) = Pinus rigida (PITCH PINE) -- II 233

Pine (Yellow) = Pinus echinata (SHORTLEAF PINE) -- II 198, 206, 377

Pine-sap = Monotropa hypopithys (PINESAP) -- V 348, IX 70, 472, X 39, 205, XI 90, 118, 209, XII 308, XIV 93

Pine-sap (American) = Monotropa hypopithys (PINESAP) -- V 343

Pine-weed = Hypericum gentianoides (PINEWEED) -- II 69

Pink = Silene caroliniana (WILD PINK) -- II 233, 313, IV 88, 122, V 212, VI 317

Pink (Common Wild) = Silene caroliniana (WILD PINK) -- VIII 359

PINK (DEPTFORD) = Dianthus armeria

Pink (Mullein) = Lychnis coronaria (MULLEIN PINK) -- V 338, IX 429

Pink (Sweet-William) = Silene armeria (SWEET-WILLIAM CATCHFLY) -- V 396, VI 431

Pink (Wild) = Silene caroliniana (WILD PINK) -- II 30, IV 69, 75, 120, V 131, 154, 188, VI 305, VII 404, XII 162, 191, XIII 296

Pinus (PINE) -- III 229

Pinus australis (LONGLEAF PINE) -- II 198

Pinus echinata (SHORTLEAF PINE) -- see Pine (Yellow), Pinus mitis

Pinus lambertiana (SUGAR PINE) -- X 185

Pinus mitis = Pinus echinata (SHORTLEAF PINE) -- II 198

Pinus pinaster (CLUSTER PINE) -- X 185

Pinus resinosa (RED PINE) -- IX 393, 394, 399

Pinus rigida (PITCH PINE) -- II 199, III 102, IX 394

Pinus strobus (EASTERN WHITE PINE) -- II 199, X 185

Pinus sylvestris (SCOTCH PINE) -- X 185

Pinweed = Lechea spp. (PINWEED) -- V 311, VI 157, 301, 427 VIII 55, 60, IX 111, 129, 141, 149, 163, 165, X 91, 444, 498, 505, XI 336, XII 40, 41, 45, 198, XIII 44, XIV 262

Pinweed (Common) = Lechea villosa (HAIRY PINWEED) -- XIV 175

Pinweed (Larger) = Lechea villosa (HAIRY PINWEED) -- IV 230, 428, VI 288, 408, IX 159

Pinweed (Thyme-leaved) = Lechea intermedia (INTERMEDIATE PINWEED)/Lechea maritima (SEA-SIDE PINWEED) 2 = VI 415

Pinxter-flower = Rhododendron roseum (ROSESHELL AZALEA) -- V 203, 207, 219

Pipes = Equisetum hyemale (SCOURING RUSH) -- VII 81, 391

Pipes = Equisetum fluviatile (WATER HORSETAIL) -- III 76, IV 73, 168, 171, 237, V 318, VI 488, XI 119, 122, 132, XII 205, 211, 226, 231, 232, 258, 270, 278, 287, XIII 267, 276, 309, 344, 345, 404, 405, 410

Pipes (Late) = Equisetum fluviatile (WATER HORSETAIL) -- V 144

Pipe-grass = Equisetum fluviatile (WATER HORSETAIL) -- VIII 161

Pipe-grass (Tall) = Equisetum fluviatile (WATER HORSETAIL) -- IV 75

Piper Grass = Agropyron repens (QUACK GRASS)/Agropyron trachycaulum (SLENDER WHEAT GRASS) 2 -- IX 400, XI 145, 370, XII 215, XIII 71, 223, 370, 402

Pipewort = Eriocaulon septangulare (SEVEN-ANGLED PIPEWORT) -- VII 479

Pipsissewa = Chimaphila umbellata (PIPSISSEWA) -- VI 346, XI 323

Pitcher-plant = Sarracenia purpurea (PITCHER PLANT) -- II 90, 493, III 24, 33, 34, 383, V 455, VI 462, 466, 468, X 130, 183, 283, XI 312, XIII 328

Plane (Occidental) = Platanus occidentalis (AMERICAN SYCAMORE) -- II 377

Plane (Oriental) = Platanus orientalis (ORIENTAL PLANE-TREE)/Platanus acerifolia (LONDON PLANE-TREE) 238 -- II 363, 377

Plane Tree = Platanus occidentalis (AMERICAN SYCAMORE) -- II 232

Plantago spp. (PLANTAIN) -- see Plantain

Plantago juncoides (SEASIDE PLANTAIN) -- see Plantago maritima, Plantain (Sea), Plantain (Sea-side)

Plantago lanceolata (ENGLISH PLANTAIN) -- see Plantain (Field), Plantain (Ribwort), Ribwort

Plantago major (COMMON PLANTAIN) 239 -- IV 200

Plantago maritima = Plantago juncoides (SEASIDE PLANTAIN)/Plantago oliganthos (SEASIDE PLANTAIN) 2 -- II 349

Plantago oliganthos (SEASIDE PLANTAIN) -- see Plantago maritima, Plantain (Sea), Plantain (Sea-side)

Plantago rugelii (RED-STEMMED PLANTAIN) -- see Plantago major

Plantain = Plantago spp. (PLANTAIN) -- i 131, 416, I 144, II 410, III 201, IV 243, V 419, VI 386

Plantain (Field) = Plantago lanceolata (ENGLISH PLANTAIN) -- IV 68, 77

Plantain (Greater) = Plantago major (COMMON PLANTAIN)/Plantago rugelii (RED-STEMMED PLANTAIN) 2 -- V 311

PLANTAIN (INDIAN) = Cacalia spp.

Plantain (Ribwort) = Plantago lanceolata (ENGLISH PLANTAIN) -- VI 335

Plantain (Robin's) = Erigeron pulchellus (ROBIN'S PLANTAIN) -- IV 82

Plantain (Sea) = Plantago juncoides (SEASIDE PLANTAIN)/Plantago oliganthos (SEASIDE PLANTAIN) 2 -- II 349, 466

Plantain (Sea-side) = Plantago juncoides (SEASIDE PLANTAIN)/Plantago oliganthos (SEASIDE PLANTAIN) 2 -- VIII 386

PLANTAIN (WATER) = Alisma spp.

Platanthera blephariglottis = Habenaria blephariglottis (WHITE FRINGED ORCHIS) -- IV 295, XI 84

Platanthera dilatata = Habenaria dilatata (WHITE BOG ORCHIS) -- XI 15, 24, 60

Platanthera fimbriata = Habenaria fimbriata (LARGER PURPLE FRINGED ORCHIS) -- IV 103, 268, IX 491, 498

Platanthera flava = Habenaria flava (TUBERCLED ORCHIS) -- IV 128, V 315, VI 369

Platanthera grandiflora = Habenaria fimbriata (LARGER PURPLE FRINGED ORCHIS) -- IV 103

Platanthera hookeri = Habenaria hookeri (HOOKER'S ORCHIS) -- VIII 377

Platanthera lacera = Habenaria lacera (RAGGED FRINGED ORCHIS) -- IV 229, VI 388

Platanthera obtusata = Habenaria obtusata (BLUNT-LEAVED ORCHIS) -- XI 29, 60

Platanthera orbiculata = Habenaria orbiculata (ROUND-LEAVED ORCHIS)/Habenaria macrophylla (LARGE ROUND-LEAVED ORCHIS) 2 -- IV 302, IX 79

Platanthera psycodes = Habenaria psycodes (SMALLER PURPLE FRINGED ORCHIS) -- IV 268, IX 498

Platanus acerifolia (LONDON PLANE-TREE) -- see Plane (Oriental)

Platanus occidentalis (AMERICAN SYCAMORE)

-- see Buttonwood, Plane (Occidental), Plane Tree, Sycamore

Platanus orientalis (ORIENTAL PLANE-TREE) -- see Plane (Oriental)

Plum = Prunus spp. (PLUM, CHERRY) -- II 360, IV 21, 90, V 121, 130, 368, 373, 407, VII 134, 504, X 37, XI 257, 261, XII 190, XIV 303

Plum (Beach) = Prunus maritima (BEACH PLUM) -- IV 69, 73, V 170, VI 279, 282, 301, 302, VII 95, 438, IX 379, 405, 446, 471, X 30, 36, 37, 71, XI 242, 270, 301, XII 322, 399, 410, XIII 304, XIV 92

Plum (Canada) = Prunus nigra (CANADA PLUM)/Prunus americana (AMERICAN PLUM) 2 -- IV 44, 50, V 119, 149, VI 255, 299, 323, VII 134, 357, 368, VIII 329, 333, IX 371, 373, X 407, XIII 282, XIV 54

Plum (Canada Red) = Prunus nigra (CANADA PLUM)/Prunus americana (AMERICAN PLUM) 2 -- II 105

Plum (Common) = 240 -- VI 255, XIII 282

Plum (Domestic) = Prunus domestica (GARDEN PLUM) -- VII 368, 378

Plum (Mealy) = Arctostaphylos uva-ursi (COMMON BEARBERRY) -- VII 95

Plum (Yellow) = Prunus nigra (CANADA PLUM)/Prunus americana (AMERICAN PLUM) 2 -- VII 134

Poa annua -- (ANNUAL BLUEGRASS) -- XII 182

Poa capillaris = Eragrostis capillaris (LACE-GRASS) -- XI 150

Poa compressa (CANADA BLUEGRASS) -- XII 199, XIII 370, 399, 401

Poa dentata = Glyceria pallida (PALE MANNA-GRASS) -- XIII 374, 385, 404

Poa hirsuta = Eragrostis capillaris (LACE-GRASS) -- VI 431, 446, 473, XI 124, 150

Poa palustris (FOWL-MEADOW GRASS) -- see Fowl-meadow Grass, Poa serotina

Poa pratensis (JUNEGRASS, KENTUCKY BLUEGRASS) -- see English Grass, June-grass

Poa serotina = Poa palustris (FOWL-MEADOW GRASS) -- XII 226

Podostemon = Podostemum ceratophyllum (RIVERWEED) -- XII 255

Podostemum ceratophyllum (RIVERWEED) -- XII 252

Pogonia = Pogonia ophioglossoides (ROSE POGONIA) -- IV 164, 170, 173, 189, 199, 217, 258, 273, V 246, 263, 288, 295, 299, VI 364, 396

Pogonia ophioglossoides (ROSE POGONIA) -- IV 200, IX 466, 472

Pogonia verticillata = Isotria verticillata (WHORLED POGONIA) -- IV 360

POGONIA (WHORLED) = Isotria verticillata

Poke = Phytolacca americana (POKEWEED) -- i 433, II 286, 489, 502, III 289, IV 239, V 310, 393, 417, VI 379, VIII 465, X 65, 88, 108, XI 227, XII 313, 351, 382, XIII 158

Pokeweed = Phytolacca americana (POKEWEED) -- i 360, I 315, III 61, IX 25, 88, 126;

Polygala = Polygala spp. (MILKWORT) -- IV 303, 309, 348, 356, 385, V 336, VII 306, 450, IX 6

Polygala (Caducous) = Polygala sanguinea (PURPLE MILKWORT) -- II 395, 503, 504, IV 232, 245, (303), 378, 400, V (366)

Polygala (Cross-leaved) = Polygala cruciata (CROSS-LEAVED MILKWORT) -- II 427, 503, IV (303)

Polygala cruciata (CROSS-LEAVED MILKWORT) -- II 427, IV 225, VI 388

Polygala (Fringed) = Polygala paucifolia (FRINGED POLYGALA) -- II 201, IV 72, 74, V 159, 164, VII 383, VIII 356, 358, IX 377, X 411

Polygala paucifolia (FRINGED POLYGALA) -- IV 72, VII 305, XIII 299

Polygala polygama (RACEMED MILKWORT) -- VII 433

Polygala sanguinea (PURPLE MILKWORT) -- II 395, 415, IV 225, V 311, VI 385, 397, VII 9, VIII 410, 435, IX 59, 113, XI 165, 300, XII 305, 320

Polygala verticillata (WHORLED MILKWORT) -- IV 303, 348, VI 397, VIII 466, IX 76, 80, XII 190

Polygala (White Fringed) = Polygala paucifolia forma alba (FRINGED POLYGALA) -- V 187

Polygala (Whorled) = Polygala verticillata (WHORLED MILKWORT) -- V 366, IX 9

Polygonatum = Polygonatum pubescens (HAIRY SOLOMON'S-SEAL) -- VII 406, XII 304

Polygonatum biflorum 241 = Polygonatum pubescens (HAIRY SOLOMON'S-SEAL) -- XII 310

Polygonatum canaliculatum (GREAT SOLOMON'S-SEAL) 242 -- IV 310, VII 406

Polygonatum pubescens (HAIRY SOLOMON'S-SEAL) -- IV 71, V 163, 224, VI 264, VII 366, 374, 406, VIII 351, 352, 361, IX 386, X 415, 433

Polygonella articulata (SAND JOINTWEED) -- see Polygonum articulatum, Polygonum (Jointed)

Polygonum = Polygonum spp. (KNOTWEED, SMARTWEED)/Polygonella articulata (SAND JOINTWEED)/ Tovara virginiana (VIRGINIA KNOTWEED) 136 -- II 64, 388, 440, III 55, 76, IV 106, 237, 319, 326, 357, 389, V 152, 162, 223, 262, 381, 388, 390, 402, 419, VI 285, 359, 395, 421, 473, 488, VII 39, 64, 256, VIII 210, IX 63, 86, 494, X 60, XI 74, 166, XII 227, 305, XIII 408, XIV 4

Polygonum amphibium (WATER SMARTWEED) 243 -- II 425, IV 247, 322, 360, V 314, 380, 390, 403, 417, VI 459, VII 14, 458, VIII 13, 445, IX 84, 128, X 21, XI 113, 165, 214, XII 320

Polygonum arifolium (HALBERD-LEAVED TEARTHUMB) -- IV 307, VI 359, 415, 455, X 18

Polygonum articulatum = Polygonella articulata (SAND JOINTWEED) -- II 456, IV 363, 393, V 387, 408, 423, VII 10, VIII 358

Polygonum aviculare (DOORWEED) -- II 504, IV 225, 406, V 410, VI 385, XI 171, XII 293, XIV 184

Polygonum careyi (CAREY'S KNOTWEED) -- IV 317, V 353, VI 405, IX 83, XII 304, 305, 313

Polygonum cilinode (FRINGED BINDWEED) -- IV 345, V 432, VIII 380, IX 86, XI 7, XIV 26

Polygonum coccineum (SWAMP SMARTWEED) -- see Polygonum amphibium

Polygonum convolvulus (BLACK BINDWEED) -- IV 172, VI 375

Polygonum cristatum (WINGED BINDWEED) -- see Polygonum dumetorum

Polygonum dumetorum = Polygonum scandens (CLIMBING FALSE BUCKWHEAT)/Polygonum cristatum (WINGED BINDWEED) 244 -- IV 334, 362, V 403, 417, 439, VI 449, VIII 462, X 25, XI 116, XII 305

Polygonum (Front-rank) = Polygonum hydropiperoides (MILD WATER PEPPER) 245 -- IV (170), (236), (326), (389), V (318), 325, (381), (452), VI 377, (421), VII 458, IX 115, XI 105, 113, 132, 166, 182, (214), XII 218, 230, 292, 305, XIII 383, 423, XIV 61

Polygonum hydropiper (COMMON SMARTWEED) = V 316, 406, 495, VI 393

Polygonum hydropiperoides (MILD WATER PEPPER) -- IV 216, 247, 326, 378, 389, 400, V 338, 381, 403, 452, 486, VI 307, 411, 421, 471, 488, VII 458, VIII 443, XI 113, 166, 182, 214, XII 292, 320

Polygonum (Jointed) = Polygonella articulata (SAND JOINTWEED) -- III 57

Polygonum (Large Spotted) = 246 -- IV 282

Polygonum (Large White) = 246 -- II 425

Polygonum (Narrow-leaved) = Polygonum hydropiperoides (MILD WATER PEPPER) -- IV 236, V 318, (403)

Polygonum orientale (PRINCE'S FEATHER) -- IV 351, V 377, VIII 445, IX 115

Polygonum pensylvanicum (PINKWEED) -- IX 63, 86, X 15, 24

Polygonum persicaria (LADY'S THUMB) -- II 61, 335, IV 176, V 309, 410, VI 378, IX 63, 86, XI 238, XII 305

Polygonum (Running) = Polygonum cilinode (FRINGED BINDWEED) -- IV 345

Polygonum robustius (STOUT SMARTWEED) -- see Polygonum (Large Spotted), Polygonum (Large White)

Polygonum sagittatum (ARROW-LEAVED TEARTHUMB) -- II 422, IV 170, V 311, VI 359, 378, VIII 413, XII 305

Polygonum scandens (CLIMBING FALSE BUCKWHEAT) -- see Polygonum dumetorum

Polygonum (Small) = Polygonum hydropiperoides (MILD WATER PEPPER) -- VII 41

Polygonum (Smaller-leaved)(bed) = Polygonum hydropiperoides (MILD WATER PEPPER) -- IV 170

Polygonum (Smaller Rose-colored) = Polygonum hydropiperoides (MILD WATER PEPPER) -- IV 326

Polygonum (Small Scratch-grass) = Polygonum sagittatum (ARROW-LEAVED TEARTHUMB) -- IV 378

Polygonum (Spotted) = Polygonum persicaria (LADY'S THUMB) -- II 61, 335, IV 385

Polygonum tenue (SLENDER KNOTWEED) -- IV 334, VIII 442, IX 17, X 19, XI 147

Polygonum virginianum = Tovara virginiana (VIRGINIA KNOTWEED) -- IX 66, 79, 86

Polygonum viviparum (ALPINE BISTORT) -- XI 35, 60

Poly (Grass) = Decodon verticillatus (SWAMP LOOSESTRIFE) -- II 502

Polypodium dryopteris = Dryopteris disjuncta (OAK FERN) -- IX 69, 79, XIII 292

Polypodium virginianum (COMMON POLYPODY) -- see Polypodium vulgare, Polypody, Polypody (Common)

Polypodium vulgare = Polypodium virginianum (COMMON POLYPODY) -- V 405, IX 483, X 462, 464

Polypody = Polypodium virginianum (COMMON POLYPODY) -- V 508, VI 189, VII 521, VIII 60, X 25, 123, 153, 154, 155, 164, XI 329, XII 57, 353, 359, XIII 262, XIV 210, 249

Polypody (Common) = Polypodium virginianum (COMMON POLYPODY) -- V 409, VI 347, XI 332, XIV 27

Polypody (Ternate) = Dryopteris disjuncta (OAK FERN) -- XI 6

Polystichum acrostichoides (CHRISTMAS FERN) -- V 343, 405, IX 69

see also Aspidium achrostichoides, Shield Fern (Terminal)

Polystichum aculeatum = Polystichum braunii (BRAUN'S HOLLY FERN) -- XI 31, 60

Polystichum braunii (BRAUN'S HOLLY FERN) -- see Polystichum aculeatum

Pomaceae = 247 -- II 211

Pond-lily = Nymphaea odorata (SWEET-SCENTED WATER LILY) -- IV 147, 148

Pond-lily (White) = Nymphaea odorata (SWEET-SCENTED WATER LILY) -- IX 432

Pondweed = Potamogeton spp. (PONDWEED) 248 -- IV 149, 169, V 124

Pondweed (Floating) = Potamogeton natans (FLOATING PONDWEED) -- IV 107

Pontederia = Pontederia cordata (PICKERELWEED) -- III 32, 53, 54, 66, 76, IV 168, 169, 171, 203, 208, 229, 233, 235, 237, 238, 239, 326, 354, 378, V 152, 162, 301, 315, 318, 380, 402, 421, 486, 496, 511, VI 285, 307, 378, 382, 390, 397, 399, 421, 464, 465, 470, 473, 485, VII 5, 13, 26, 39, 50, 57, 71, 255, 256, 387, 458, 501, 507, VIII 4, 302, 303, IX 85, X 60, 376, 407, XI 11, 68, 69, 71, 113, 114, 117, 119, 203, 213, 251, 294, XII 73, 141, 185, 225, 230, 231, 243, 248, 270, 278, 305, 318, 355, 389, 394, XIII 54, 316, 347, 401, 405, 408, 424, XIV 55, 73, 146

Pontederia cordata (PICKERELWEED) -- IV 163

Poplar = Populus spp. (POPLAR, ASPEN) -- i 42, 216, 256, I 43, 203, II 197, III 35, 329, 477, IV 237, 310, 386, 456, V 7, 15, 50, 53, 61, 85, 86, 130, 440, 443, VI 88, 178, 195, 196, VII 269, VIII 174, 181, 372, IX 289, X 23, XI 115, 262, 278, 347, XII 114, 181, XIII 293, 296, 333, 334, XIV 160, 175, 263, 329

Poplar (Aspen) = Populus tremuloides (QUAKING ASPEN)/Populus grandidentata (BIGTOOTH ASPEN) 143 -- III 80

Poplar (Balm-of-Gilead) = Populus x gileadensis (BALM-OF-GILEAD) 249 -- VIII 322

Poplar (Balsam) = Populus balsamifera (BALSAM POPLAR) -- II 197

Poplar (Great) = Populus grandidentata (BIGTOOTH ASPEN) -- VI 259, 281

Poplar (Great-leaved) = Populus grandidentata (BIGTOOTH ASPEN) -- V 160

Poplar (Heart-leaved Balsam) = Populus x gileadensis (BALM-OF-GILEAD) -- II 197

Poplar (Italian) = Populus nigra var. italica (LOMBARDY POPLAR) -- XI 264, 301

Poplar (Large) = Populus grandidentata (BIGTOOTH ASPEN) -- X 100

Poplar (Lombardy) = Populus nigra var. italica (LOMBARDY POPLAR) -- II 197, V 450, VII 378, XI 210, 234, 261, 268, 276,

Poplar (River) = Populus deltoides (EASTERN COTTONWOOD) -- III 329

Poplar (Silvery White) = Populus alba (WHITE POPLAR) -- VII (378)

Populus = Populus spp. (POPLAR, ASPEN) -- X 477

Populus alba (WHITE POPLAR) -- see Abele, Abele (Silvery), Poplar (Silvery White)

Populus balsamifera (BALSAM POPLAR) -- II 197, IV 49, V 116

Populus candicans = Populus x gileadensis (BALM-OF-GILEAD) -- II 197

Populus deltoides (EASTERN COTTONWOOD) -- see Poplar (River), Populus monolifera

Populus x gileadensis (BALM-OF-GILEAD) -- see Balm-of-Gilead, Gilead, Poplar (Balm-of-Gilead), Populus candicans

Populus grandidentata (BIGTOOTH ASPEN) -- II 197, III 18, 36, 345, 348, 481, IV 19, 47, 49, 62, 309, 329, V 89, 103, 116, 126, 129, 138, 156, 280, 440, 447, 516, VI 205, 209, 219, 230, 263, 264, 284, 300, 305, 454, VII 236, 325, X 100, 276, 379, 428, XI 14, 233, 244, 249, 259, 261, 276, 278, XII 154, 380, XIII 304, 336

Populus monolifera = Populus deltoides (EASTERN COTTONWOOD) -- IX 71, 415

Populus nigra var. italica (LOMBARDY POPLAR) -- see Aspen (Black), Poplar (Italian), Poplar (Lombardy)

Populus tremuliformis = Populus tremuloides (QUAKING ASPEN) -- V 97, 103, 105, 138, 156, VII 64, X 463, 464, XI 10, 14, 246, 258, 261, 268, 301, 308, 318, XIII 296, 333, XIV 26

Populus tremuloides (QUAKING ASPEN) -- II 197, III 348, 362, 475, IV 40, 418, 419, V 5, 61, 447, VI 186, 189, 195, 229, VII 306, XI 244, 262, 276, 278

Poppy = Papaver somniferum (COMMON POPPY) -- I 457

Porcupine Grass = Stipa spartea (PORCUPINE GRASS) -- XIV 343

Portulaca = Portulaca oleracea (COMMON PURSLANE) -- VIII 467, IX 482

Portulaca oleracea (COMMON PURSLANE) -- II 423, IV 210

Potamogeton = Potamogeton spp. (PONDWEED) -- IV 174, 179, 210, 222, 268, 309, 321, V 152, 223, 226, 262, 284, 299, 301, 307, 310, 311, 486, VI 285, 307, 335, 344, 345, 361, 391, 406, 447, 449, 461, VII 13, 456, VIII 424, 429, 434, 462, X 19, 350, 487, 488, XI 46, 71, 75, 77, 105, 122, 123, 132, 149, 160, XII 141, 221, 225, 229, 230, 240, 261, 264, 270, 273, 280, 285, 303, XIII 268, 315, 347, 348, 357

Potamogeton amplifolius (LARGE-LEAVED PONDWEED) -- see Potamogeton (Broad-leaved)

Potamogeton (Broad-leaved) = 250 -- VI 345

Potamogeton capillaceus (HAIR-LIKE PONDWEED) -- see Potamogeton hybridus

Potamogeton claytoni = 251 -- VI 447, XI 123

Potamogeton compressus = Potamogeton zosteriformis (EEL-GRASS PONDWEED) -- V 315

Potamogeton epihydrus (SURFACE PONDWEED) -- see Potamogeton claytoni, Potamogeton heterophyllus

Potamogeton gramineus (GRASS-LEAVED PONDWEED) -- see Potamogeton claytoni, Potamogeton heterophyllus

Potamogeton heterophyllus = 251 -- IV 222, V 311, 317, VIII 424, 429, XI 123

Potamogeton hybridus = Potamogeton spirillus (SPIRAL PONDWED)/Potamogeton capillaceus (HAIR-LIKE

PONDWEED) 2 -- IV 151, 222, 268, V 311, 325, VIII 424, 429, XI 160

Potamogeton natans (FLOATING PONDWEED) 252 -- IV 107, 149, 169, 179, V 300, VIII 429

Potamogeton oakesianus (OAKES' PONDWEED) -- see Potamogeton natans

Potamogeton pulcher (SPOTTED PONDWEED) -- IV 179, V 300

Potamogeton robbinsii (ROBBIN'S PONDWEED) -- III 52, V 307, XII 280

Potamogeton spirillus (SPIRAL POTAMOGETON) -- see Potamogeton hybridus

Potamogeton zosteriformis (EEL-GRASS POTAMOGETON) -- see Potamogeton compressus

Potato (Wild) = Solanum tuberosum var. guaytecarum (POTATO) 253 -- II 261

Potato (Wild) = Apios americana (GROUNDNUT) -- IV 491

Potentilla = Potentilla spp. (CINQUEFOIL) -- IV 81, V 335, VI 279, VII 356, 405, XI 18, XII 163

Potentilla anserina 254 = Potentilla egedei var. groenlandica (ARGENTINE) -- IX 427, 429

Potentilla argentea (SILVERY CINQUEFOIL) -- II 270, IV 80, 257, 411, 415, VI 283, VIII 356

Potentilla arguta (TALL CINQUEFOIL) -- V 263, VIII 402, IX 468

Potentilla (Ascendant) = Potentilla simplex (COMMON CINQUEFOIL) -- XII 191

Potentilla canadensis (DWARF CINQUEFOIL) 255 -- IV 11, 49, 257, 349, 367, V 116, 477, VI 269, 297

Potentilla (Early) = Potentilla canadensis (DWARF CINQUEFOIL) -- VI 453, IX 402, X 377, 487, XIII 244, 271, 378

Potentilla egedei var. groenlandica (ARGENTINE) -- see Potentilla anserina

Potentilla (Erect) = Potentilla simplex (COMMON CINQUEFOIL) -- X 510

Potentilla (Mountain) = Potentilla tridentata (THREE-TOOTHED CINQUEFOIL) -- XIV 14

Potentilla norvegica (ROUGH CINQUEFOIL) -- II 430, V 263, 335, 477, VI 358, 359, 382, VII 384, 411, IX 30, X 502, XIII 69

Potentilla (Norway) = Potentilla norvegica (ROUGH CINQUEFOIL) -- IV 122

Potentilla palustris (MARSH CINQUEFOIL) -- see Cinquefoil (Marsh), Comara palustris, Comarum palustre

Potentilla recta (ROUGH-FRUITED CINQUEFOIL) -- XIII 428

Potentilla sarmentosa = Potentilla canadensis (DWARF CINQUEFOIL) -- II 270, III 66

Potentilla (Silvery) = Potentilla argentea (SILVERY CINQUEFOIL) -- V 477, VII 399

Potentilla simplex (COMMON CINQUEFOIL) -- II 270, IV 81

Potentilla tridentata (THREE-TOOTHED CINQUEFOIL) -- IV 347, X 457, 463, 476, XI 10, 18, 61, XIV 25, 28

Poverty Grass = Aristida dichotoma (POVERTY GRASS) -- XI 125, 151

Poverty Grass = Hudsonia spp. (HUDSONIA) -- VII 95, IX 435, 443, 444, 450, X 510

Prenanthes = Prenanthes spp. (RATTLESNAKE-ROOT) -- II 410, IV 356, 382, V 304, 343

Prenanthes alba 344 (WHITE LETTUCE) -- II 396, 467, XII 257

Prenanthes altissima (TALL WHITE LETTUCE) -- see Nabalus altissimus

Prenanthes boottii (BOOTT'S RATTLESNAKE ROOT) -- see Nabalus boottii

Prenanthes serpentaria (LION'S-FOOT) -- see Nabalus fraseri

Prenanthes trifoliolata (TALL RATTLESNAKE ROOT) -- see 344

Prenanthes (White-flowering) = Prenanthes alba (WHITE LETTUCE) -- II 396

Primrose = Oenothera spp. (EVENING PRIMROSE) -- i 253, 287, I 200, 237, II 60, V 419, 432, VI 90, 489, VIII 465, XII 304, XIII 68

Primrose (Dwarf) = Oenothera perennis (SMALL SUNDROPS) 256 -- III 65, IV 195

Primrose (Early) = Oenothera perennis (SMALL SUNDROPS) -- VII 411

Primrose (Evening) = Oenothera biennis (COMMON EVENING PRIMROSE)/ Oenothera parviflora (SMALL-FLOWERED EVENING PRIMROSE) 143 -- IV 159, IX 240

Primrose (Great) = Oenothera biennis (COMMON EVENING PRIMROSE)/ Oenothera parviflora (SMALL-FLOWERED EVENING PRIMROSE) 143 -- V 476

Primrose (Large) = Oenothera biennis (COMMON EVENING PRIMROSE)/ Oenothera parviflora (SMALL-FLOWERED EVENING PRIMROSE)143 -- V 509, VI 430, XII 80

Primrose (Large Evening) = Oenothera biennis (COMMON EVENING PRIMROSE)/ Oenothera parviflora (SMALL-FLOWERED EVENING PRIMROSE) 143 -- VIII 400

Primrose (Small) = Oenothera perennis (SMALL SUNDROPS) -- V 226, VIII 380

Prince's-feather = Polygonum orientale (PRINCE'S FEATHER) -- IV 351, 360, VI 449

Prinos = Ilex spp. (WINTERBERRY) 257 -- II 278, 281, III 33, IV 431, 449, V 160, 175, 390, 449, 481 VI 127, IX 92, X 196, XII 382, 383, XIII 158

Prinos (Common) = Ilex verticillata (COMMON WINTERBERRY)

Prinos (Evergreen) = Ilex glabra (INKBERRY) -- VII 90

Prinos laevigatus = Ilex laevigata (SMOOTH WINTERBERRY) -- IV 121, 258, V 229, 255, VI 350, VIII 385, X 24

Prinos (Single-berry) = Ilex laevigata (SMOOTH WINTERBERRY) -- VI 284, 301

Prinos verticillatus = Ilex verticillata (COMMON WINTERBERRY) -- IV 141, V 290, VI 301, 374, VII 379, X 82, 282

Privet = Ligustrum spp. (PRIVET) 258 -- III 4, IV 170, VI 221, VII 340, IX 135, XI 159, 261, 262, 301, 329, XII 374, 380

Proserpinaca = Proserpinaca palustris (COMMON MERMAID WEED) -- V 308, VI 383, 452, 466, 469, 473, 477, VII 369, X 18, 372, 383

Proserpinaca palustris (COMMON MERMAID WEED) -- II 432, IV 265

Proserpinaca pectinacea (CUT-LEAVED MERMAID WEED) 259 -- VIII 387

Proserpinaca (Spear-leaved) = Proserpinaca palustris (COMMON MERMAID WEED) -- II 432

Prunella = Prunella vulgaris (HEAL-ALL) II 65, 266, 273, 310, 415, 458, IV 121, 141, 173, 229, 232, 258, V 236, 379, VI 342

Prunella vulgaris (HEAL-ALL) -- see Prunella, Self-heal

Prunus = Prunus spp. (CHERRY, PLUM) -- VIII 356, IX 498

Prunus americana (AMERICAN PLUM) 260 -- VI 255

Prunus avium (SWEET CHERRY) -- see Cherry (Black Eagle), Cherry (English)

Prunus borealis = Prunus pensylvanica (PIN CHERRY) -- VIII 118

Prunus depressa (DWARF CHERRY) 261 -- II 12, IV 100, IX 75, 499

Prunus domestica (GARDEN PLUM) -- see Plum (Common), Plum (Domestic)

Prunus maritima (BEACH PLUM) -- IV 73

Prunus nigra (CANADA PLUM) -- see Plum (Canada), Plum (Canada Red), Prunus americana

Prunus obovata = Prunus virginiana (CHOKE CHERRY) -- VI 100

Prunus pensylvanica (PIN CHERRY) -- see Cerasus pennsylvanica, Cherry (Northern Red), Cherry (Northern Wild), Cherry (Red), Cherry (Wild Red), Prunus borealis

Prunus persica (PEACH) -- see Peach

Prunus pumila = Prunus susquehanae (SAND CHERRY) -- IX 499

Prunus serotina (BLACK CHERRY) -- see Cerasus serotina, Cherry (Black), Cherry (Common Rum), Cherry (Rum), Cherry (Wild Black), Cherry (Wild Rum)

Prunus susquehanae (SAND CHERRY) -- see Cerasus pumila, Cherry (Dwarf), Cherry (Sand), Prunus depressa, Prunus pumila

Prunus virginiana (CHOKE CHERRY) 81 -- IV 100

Pseodotsuga menziesii (DOUGLAS FIR) -- see Abies douglasii

Pteretis pensylvanica (OSTRICH FERN) -- see Struthiopteris germanica

Pteridium aquilinum (BRACKEN) -- see Brake, Brake (Common), Pteris aquilina

Pteris aquilina = Pteridium aquilinum (BRACKEN) -- V 405

Pulsatilla patens = Anemone patens (PASQUE-FLOWER) -- VIII 341, IX 80

Purple Grass = Glyceria spp. (FLOAT-GRASS) -- VII 338

Purple Grass = Eragrostis pectinacea (INDIA LOVE-GRASS)/Eragrostis spectabilis (PURPLE LOVE-GRASS) 143 -- XI 181, 253, XII 288, XIV 54

Purple Grass (Early) = Agrostis scabra (FLY-AWAY GRASS) -- XIII 397

Purple Grass (Early) = Glyceria borealis (NORTHERN FLOAT-GRASS)/Glyceria septentrionalis (FLOATING MANNA-GRASS) 143 -- VIII 321

Purple Grass (Fine) = Eragrostis capillaris (LACE LOVE-GRASS) -- XI 145

Purslane = Portulaca oleracea (COMMON PURSLANE) -- II 423, IV 210, V 315, VI 348

PURSLANE (MILK) = Euphorbia supina

Purslane (Water) = Ludwigia palustris (WATER PURSLANE) -- IV 207, V 449, X 310, 372, XII 100, XIII 165

Pursley = Portulaca oleracea (COMMON PURSLANE) -- VIII 420

PUSSYTOES = Antennaria spp.

Pycnanthemum = Pycnanthemum spp. (MOUNTAIN MINT) -- VIII 459, XII 305

Pycnanthemum incanum (HOARY MOUNTAIN MINT) -- II 461, V 322, VI 400, VIII 436, 459

Pycnanthemum lanceolatum = Pycnanthemum virginianum (VIRGINIA MOUNTAIN MINT)/ Pycnanthemum tenuifolium (NARROW-LEAVED MOUNTAIN MINT) 2 -- IV 279, V 321, 343, VI 388

Pycnanthemum muticum (SHORT-TOOTHED MOUNTAIN MINT) -- IV 247, V 333, 343, VI 383, 395, VIII 408, 411

Pycnanthemum tenuifolium (NARROW-LEAVED MOUNTAIN MINT) -- see Pycnanthemum lanceolatum

Pycnanthemum virginianum (VIRGINIA MOUNTAIN MINT) -- see Pycnanthemum lanceolatum

Pyrola = Pyrola spp. (PYROLA)/Moneses uniflora (ONE-FLOWERED PYROLA)/ Chimaphila spp. (WINTERGREEN, PIPSISSEWA) -- III 481, IV 30, 91, 114, 170, 258, V 33, 348, VI 12, VII 113, X 281, 301, XI 322, 323, 337, XIV 271

Pyrola asarifolia (PINK PYROLA) 262 -- II 266, IV 129

Pyrola chlorantha = Pyrola virens (GREENISH-FLOWERED PYROLA) -- IV 199, V 225, 233, VI 343, VII 404

Pyrola elliptica (SHIN-LEAF) -- IV 199, V 310, VI 381, VIII 404, XII 216

Pyrola (Great-leaved) = Pyrola rotundifolia (ROUND-LEAVED PYROLA) -- VII 188

Pyrola (Great Round-leaved) = Pyrola rotundifolia (ROUND-LEAVED PYROLA) -- XI 337

Pyrola (Large) = Pyrola rotundifolia (ROUND-LEAVED PYROLA) -- VI 149

Pyrola maculata = Chimaphila maculata (STRIPED WINTERGREEN) -- VIII 118

Pyrola (One-sided) = Pyrola secunda (ONE-SIDED PYROLA) -- IV 129, V 310

Pyrola rotundifolia (ROUND-LEAVED PYROLA) -- II 282, 458, III 364, IV 199, V 310, VI 375, 381, VIII 404

Pyrola (Round-leaved) = Pyrola rotundifolia (ROUND-LEAVED PYROLA) -- X 280

Pyrola secunda (ONE-SIDED PYROLA) -- IV 129, V 310, VI 12, 372, VII 233, IX 472, 478, 491, X 38

Pyrola (Small-leaved) = Pyrola virens (GREENISH-FLOWERED PYROLA) -- V 220

Pyrola (Spotted) = Chimaphila maculata (STRIPED WINTERGREEN) -- VI 388

Pyrola umbellata = Chimaphila umbellata (PIPSISSEWA) -- II 282, XI 261

Pyrola (Umbelled) = Chimaphila umbellata (PIPSISSEWA) -- II 283, IV 101, V 310, 473, X 505

Pyrola virens (GREENISH-FLOWERED PYROLA) -- see Pyrola asarifolia, Pyrola chlorantha, Pyrola (Small-leaved)

Pyrus = 263 -- II 211, 424, IV 281, 308, 432, VI 278, 296, 298, VII 352, 357, VIII 10, 355, 359, 411

Pyrus americana (AMERICAN MOUNTAIN-ASH) -- see Mountain-ash (American)

Pyrus angustifolia (SOUTHERN CRAB-APPLE) -- II 211

Pyrus arbutifolia 264 = Pyrus melanocarpa (BLACK CHOKEBERRY)/Pyrus floribunda (PURPLE CHOKEBERRY) -- II 60, III 430, IV 69, 71, 75, 248, V 126, 160, 166, VI 234, 235, 298, 393, VII 332, 357, 358, X 458, 464, XIII 304

Pyrus arbutifolia var. erythrocarpa = Pyrus floribunda (PURPLE CHOKEBERRY) -- II 216, IX 397

Pyrus arbutifolia var. melanocarpa = Pyrus melanocarpa (BLACK CHOKEBERRY) -- II 216, IV 228

Pyrus (Arbutus) = Pyrus melanocarpa (BLACK CHOKEBERRY)/Pyrus floribunda (PURPLE CHOKEBERRY) 143 -- IV 41

Pyrus aucuparia (EUROPEAN MOUNTAIN-ASH) -- IX 415, 460

Pyrus botryapium = Amelanchier laevis (SMOOTH SHADBUSH) -- IV 48, 57

Pyrus communis (COMMON PEAR) -- see Pear

Pyrus coronaria (WILD SWEET CRABAPPLE) -- II 211

Pyrus floribunda (PURPLE CHOKEBERRY) -- see Chokeberry, Chokeberry (Red), Chokeberry (Red-fruited), Chokeberry (Scarlet), Pyrus arbutifolia, Pyrus arbutifolia var. erythrocarpa, Pyrus (Arbutus), Pyrus (Red)

Pyrus malus (COMMON APPLE) -- see Apple

Pyrus melanocarpa (BLACK CHOKEBERRY) -- see Chokeberry, Chokeberry (Black), Chokeberry (Black-fruited), Pyrus arbutifolia, Pyrus arbutifolia var. melanocarpa, Pyrus (Arbutus), Pyrus (Smooth-leaved)

Pyrus ovalis = Amelanchier canadensis (THICKET SHADBUSH) -- IV 48, 57, 129, V 120

Pyrus (Red) = Pyrus floribunda (PURPLE CHOKEBERRY) -- IV 322, IX 391

Pyrus sanguinea = 265 -- IV 130

Pyrus (Smooth-leaved) = Pyrus melanocarpa (BLACK CHOKEBERRY) -- VIII 356

Pyrus (Swamp) = Amelanchier canadensis (THICKET SHADBUSH) -- V 120, VII 511, VIII 41, IX 334, X 171



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http://www.ray-a.com/ThoreauBotIdx/BI-P.htm -- Revised: Oct. 4, 2013

Created by: Ray Angelo
rangelo@oeb.harvard.edu