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Oak = Quercus spp. (OAK) -- i 5, 10, 41, 57, 127, 135, 136, 150, 154, 178, 223, 339, 345, 347, 381, 400, 409, I 3, 4, 9, 42, 90, 91, 139, 161, 166, 290, 296, 298, 338, 359, 381, 408, 424, II 9, 17, 18, 59, 90, 99, 103, 154, 197, 199, 203, 316, 366, 377, 416, 457, 461, 482, 486, III 33, 35, 37, 55, 63, 69, 80, 97, 132, 218, 220, 223, 228, 261, 276, 279, 301, 302, 338, 344, 349, 356, 358, 380, 385, 393, 404, 409, 420, 428, 432, 434, 439, 441, 456, 463, 466, 481, 484, IV 3, 6, 19, 30, 32, 33, 42, 47, 52, 59, 64, 71, 79, 80, 83, 84, 89, 113, 117, 128, 158, 184, 192, 218, 227, 234, 277, 298, 312, 320, 342, 355, 394, 399, 405, 416, 422, 429, 439, 440, 441, 448, 462, 465, 473, V 17, 25, 30, 35, 50, 51, 54, 73, 91, 94, 98, 117, 123, 129, 137, 138, 147, 149, 153, 235, 249, 250, 268, 271, 295, 296, 364, 383, 384, 386, 389, 390, 391, 416, 427, 441, 444, 516, 520, 527, VI 27, 37, 40, 48, 60, 156, 164, 208, 220, 223, 229, 239, 243, 249, 256, 262, 265, 266, 280, 289, 293, 295, 321, 322, 351, 355, 363, 414, 419, 422, 459, 470, VII 9, 10, 14, 15, 21, 35, 36, 39, 45, 46, 48, 49, 60, 63, 72, 118, 120, 127, 128, 129, 133, 140, 235, 236, 267, 285, 308, 313, 334, 342, 359, 362, 370, 373, 383, 384, 388, 424, 450, 455, 457, 462, 472, 508, 518, 527, VIII 4, 6, 15, 23, 38, 67, 73, 82, 97, 120, 127, 138, 159, 196, 254, 255, 267, 268, 269, 270, 273, 315, 329, 331, 335, 339, 340, 342, 344, 362, 392,407, 415, 432, IX 26, 81, 86, 88, 111, 137, 169, 170, 192, 212,218, 230, 253, 339, 348, 352, 380, 404, 406, 421, 434, X 11, 30,40, 41, 44, 51, 56, 57, 67, 69, 80, 88, 90, 91, 94, 96, 102,113, 117, 119, 132, 133, 138, 148, 175, 183, 199, 220, 248, 278, 279, 280,365, 419, 424, 428, 435, 439, 451, 504, 506, 509, XI 9,38, 54, 88, 101, 102, 106, 110, 112, 132, 134, 141, 143, 153,163, 169, 196, 198, 203, 207, 211, 220, 222, 230, 235, 236, 237, 239, 245, 247, 248, 249, 250, 253, 264, 265, 278, 284, 302, 308, 323, 333, 334, 339, 340, 341, 344, 352, 364, 375, 385, 394, 434, 449, XII 6, 32, 40, 56, 58, 71, 76, 125, 158, 180, 188, 190, 194, 207, 219, 222, 277, 351, 352, 362, 374, 385, 442, 447, 451, XIII 10, 76, 83, 91, 123, 148, 192, 214, 258, 260, 288, 294, 295, 296, 309, 317, 325,329, 331, 333, 338, 341, 347, 359, 410, 416, 417, XIV 75, 95, 101, 103, 105, 115, 121,125, 126, 127, 128, 129, 130, 131, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142,143, 144, 145, 147, 148, 149, 150, 151, 152, 154, 155, 156, 157, 158, 162, 164,165, 166, 167, 168, 169, 170, 171, 175, 178, 179, 180, 181, 182, 183, 184, 188, 189, 190, 191, 192, 194, 195,196, 198, 200, 205, 206, 209, 210, 212, 213, 215, 216, 218,220, 221, 223, 225, 226, 227, 229, 230, 242, 247, 248,249, 252, 253, 254, 255, 259, 263, 267, 268, 269, 271, 272, 276, 277, 279, 280, 281, 282, 285, 286, 289, 290,291, 296, 307, 312, 313, 323, 331
Oak (Bear) = Quercus ilicifolia (SCRUB OAK) -- II 216, IV 477, VI 261
Oak (Bear Scrub) = Quercus ilicifolia (SCRUB OAK) -- VI 280, VII 105, (114), (115), 139
Oak (Bear Shrub) = Quercus ilicifolia (SCRUB OAK) -- VI 279, 287
Oak (Black) = Quercus velutina (BLACK OAK) -- II 201, 216, III 57, 80, 141, 223, 380, IV 42, 48, 67, 89, 112, 379, 399, (477), V 20, 66, 126, 138, (149), 156, 157, 160, 167, 168, (268), (296), 440, 447, 450, VI 3, 236, 244, 264, 266, 268, 279, 280, 287, 289, 300, 331, (332), 406, 423, VII (45), (48), (49), 51, 55, 60, 103, (108), (114), 127, (139), 272, 374, 379, (383), 405, 506, VIII (108), 392, IX 118, 128, 170, (193), 201, 380, 386, (391), X 26, 30, 87, 94, 129, 195, XI 211, 214, (216), 233, (235), 247, 248, 264, (265), (266), 271, 302, 306, 347, 365, 370, 409, 411, (434), XII 18, 338, 363, 374, 381, XIII 336, 338, XIV (112), 128, 129, (154), 155, 172, 182, 216, 225, 230, 240, 242, 244, 246, 254, 270
Oak (Black Scrub) = Quercus ilicifolia (SCRUB OAK) -- VII 378, IX 118, XI 232, 248
Oak (Black Shrub) = Quercus ilicifolia (SCRUB OAK) -- VI 300, 321, 328, VII 107, IX 385, XI 238, XIII 312, (336), XIV 172,
Oak (Chestnut) = Quercus prinus (CHESTNUT OAK) -- IV 462, 475, V 160, 172, (184), VI (266), 295, 300, VII 472, VIII 380, IX 138, 139, 391, 397, X 39, 119, XIV 264
Oak (Chinquapin) = Quercus prinoides (DWARF CHINQUAPIN OAK) -- II 216, IV 265, (477), V 160, 166, VI (280), 300, VII (34), 383, X 70, 83, XII 291, 399, XIII (336)
Oak (Chinquapin Shrub) = Quercus prinoides (DWARF CHINQUAPIN OAK) -- IV 71
Oak (Dwarf Chestnut) = Quercus prinoides (DWARF CHINQUAPIN OAK) -- II 216, VI (266)
Oak (English) = Quercus robur (ENGLISH OAK) -- II 363, 377, VII 63, IX 414
OAK FERN = Dryopteris disjuncta
Oaks (Gerardia) = 211 -- X 30
Oak (Gray) = Quercus coccinea (SCARLET OAK) -- II 201
OAK (JERUSALEM) = Chenopodium botrys
Oak (Laurel) = Quercus imbricaria (SHINGLE OAK) -- IX 137
Oak (Over-cup) = Quercus macrocarpa (MOSSY-CUP OAK)/Quercus lyrata (OVER-CUP OAK) 212 -- VIII 294, 300
Oak (Pin) = Quercus palustris (PIN OAK) -- IX 137, 139
Oak (Red) 341 = Quercus velutina (BLACK OAK) -- III 338
Oak (Red) = Quercus rubra (RED OAK) -- II 201, III 57, 80, 129, 141, 151, 223, 235, 318, 356, IV 42, 43, 47, 48, 67, 113, 379, 399, 439, 442, (477), (486), V (126), (138), (149), 156, 157, 160, 163, 167, 168, 228, (268), 323, 447, 450, VI 3, 36, 236, (256), 262, 266, 268, 279, 283, 284, 285, (287), 289, 300, 304, (332), 350, 406, VII 64, 112, 113, (114), 115, 139, 364, 374, 442, 506, VIII (108), 147, 360, IX 75, 118, 193, 201, 386, 391, X 55, 57, 100, 106, 156, 157, 195, 433, XI 10, (54), 81, 211, 216, 217, 232, 233, (235), 248, 256, 264, 265, 276, 306, 434, XII 447, XIII 97, 304, 331, 351, XIV 124, 128, 172, 182, 209, 214, 215, 216, (218), 225, 226, 230, 242, 270
Oak (Rock Chestnut) = Quercus prinus (CHESTNUT OAK) -- IV 477
Oak (Royal) 213 = Quercus robur (ENGLISH OAK) -- II 377
Oak (Scarlet) = Quercus coccinea (SCARLET OAK) -- III 57, 223, IV 477, (486), V 160, 436, VI 36, (266), 304, (332), VII 45, (48), 51, 55, 56, 59, (114), 115, (139), 379, 383, (506), IX 137, 170, 181, (193), 391, X 10, 40, 67, 80, 81, 84, 90, (97), 119, 148, 301, XI 207, 211, 220, 232, (235), (236), (237), 239, 244, 245, 247, 250, 251, 258, 260, 262, 264, 265, 266, 267, 268, 271, 276, 277, 278, 279, 284, 285, 291, 301, 302, 306, 308, 318, 330, 341, 368, 370, 411, 434, XII 71, 363, 374, 379, XIV (112), 124, 128, 172, 209, 225, 230, 242
Oak (Scrub) = Quercus ilicifolia (SCRUB OAK) -- II 216, III 111, IV 464, VI 445, IX 139, XI 195
Oak (Shingle) = Quercus imbricaria (SHINGLE OAK) -- IX 137
Oak (Shrub) = Quercus ilicifolia (SCRUB OAK) 214 -- i 211, 216, I 400, 471, II 18, 19, 85, 86, 99, 106, 107, 127, 139, 196, 305, 406, 431, III 7, 16, 40, 51, 59, 79, 93, 144, 145, 190, 223, 380, 387, 391, 411, 469, IV 10, 48, 59, 61, 65, 89, 144, 196, 197, 204, 377, 379, 409, 417, 486, V 92, 117, 126, 129, 138, 149, 160, 177, 204, 398, 400, 450, 520, VI 3, 27, 220, 224, 236, 243, 244, 253, 256, 261, 266, 278, 279, 304, 305, 321, 379, 405, 428, 479, VII 10, 49, 95, 148, 151, 183, 189, 199, 250, 353, 393, 438, VIII 75, 80, 166, 180, 319, 336, 341, 363, 368, IX 26, 60, 111, 146, 147, 148, 153, 184, 185, 191, 192, 194, 206, 216, 350, X 72, 81, 195, 198, 214, 220, 249, 262, 305, XI 126, 184, 337, 343, XII 125, 322, 338, 351, 361, 364, 368, 381, 383, 447, 453, XIII 231, 239, 294, 304, 333, 334, 338, 359, 364, XIV 63, 75, 105, 116, 128, 129, 155, 172, 175, 179, 182, 194, 195, 201, 208, 259, 263, 268, 279, 280
Oak (Solidago) = 216 -- XII 6
Oak (Swamp) = Quercus bicolor (SWAMP WHITE OAK) -- VI 448, VII 421, VIII 3
Oak (Swamp White) = Quercus bicolor (SWAMP WHITE OAK) -- II 225, III 43, 54, 109, 129, 332, 383, 424, IV (32), 149, 151, 152, 211, 222, 301, 477, V 123, (138), 160, 172, (184), 201, 275, 307, 436, 452, 490, VI 253, 264, (266), 275, 278, (280), 285, 300, 331, 344, 371, 383, 424, 429, 470, 471, VII 14, 18, (34), (114), 126, 253, 259, 308, 428, 430, 450, 507, 527, VIII 123, 137, 200, 220, 281, 346, 405, IX 253, 397, X 50, 78, 80, 87, (100), 117, 384, XI 80, 81, 105, 164, 206, (214), 233, 256, 264, (278), 306, 378, 394, 409, 434, XII 140, 206, 244, XIII 246, 313, (336), 347, 402, 412, 416, 417, XIV 134, 209, 216, 218, 243, 248, 295, 296
Oak (White) = Quercus alba (WHITE OAK) -- II 64, 142, 216, 504, III 43, 44, 57, 87, 93, 100, 109, 111, (141), 338, 462, IV (32), 42, 48, 59, 132, 378, 379, 399, 431, 442, 448, 477, 486, V 52, 104, (138), 156, 160, 164, 167, 168, 172, 177, 180, 184, 210, 211, 245, 284, 436, 440, 447, (450), VI 3, 113, 128, 236, 243, 244, 249, 264, 266, 269, 275, 280, 286, 289, 293, 301, 304, 305, 318, 321, 331, VII (34), 36, 48, 55, 60, 63, 107, 114, 118, 121, (127), 142, 146, 149, 157, (236), 312, 378, 398, 400, 405, 414, 510, VIII 166, 197, 254, 269, 273, 323, 351, 363, IX 117, 138, 139, 188, (193), 201, 344, 380, 391, 397, X 12, 57, 70, 84, 90, (94), 119, 175, 192, 220, 238, 249, 301, (365), 509, XI (196), (207), 210, 211, (235), 236, 247, (248), (256), 265, (278), 306, 337, 341, 370, 385, 409, 411, 413, 434, XII 19, 47, 71, 117, 215, 291, (374), 375, 447, XIII 66, 83, 192, 224, 281, 288, 317, 319, 336, 338, 341, 410, XIV 96, 101, 103, 115, 123, 128, 129, 131, 133, 147, 148, 163, 165, 172, 178, 180, 182, 188, 189, (194), 209, 210, 215, 216, 217, (218), 219, 220, 221, 222, 225, 226, 227, 230, 239, 240, 242, 243, 246, 250, 252, 253, 255, 263, 270, 277, 290, 291
Oak (White Shrub) = Quercus alba (WHITE OAK) -- X 97
Oak (Willow) = Quercus phellos (WILLOW OAK) -- IX 137
Oak (Yellow) = Quercus muhlenbergii (CHINQUAPIN OAK) -- II 64
Oaklet (Chinquapin) = Quercus prinoides (DWARF CHINQUAPIN OAK) -- XII 291
Oats = Avena sativa (OATS) -- VIII 410
Oats (Water) = Zizania aquatica (WILD RICE) -- IV 297
Oats (Wild) = Zizania aquatica (WILD RICE) 217 -- i 120, 471, I 132, V 221, 440, XI 105
OATS (WILD) = Uvularia sessilifolia
Oat Grass (Meadow) = Danthonia spp. (WILD OAT-GRASS) 218 -- XI 161
Oenothera spp. (EVENING PRIMROSE) -- see Primrose
Oenothera biennis (COMMON EVENING PRIMROSE) 219 -- II 273, 383, IV 159, VI 378
Oenothera (Large) = Oenothera biennis (COMMON EVENING PRIMROSE)/Oenothera parviflora (SMALL-FLOWERED EVENING PRIMROSE) 2 -- V 313
Oenothera parviflora (SMALL-FLOWERED EVENING PRIMROSE) -- see Oenothera biennis
Oenothera perennis (SMALL SUNDROPS) -- see Oenothera pumila, Primrose (Dwarf), Primrose (Early), Primrose (Small), Tree-primrose (Dwarf)
Oenothera pumila = Oenothera perennis (SMALL SUNDROPS) -- II 278, IV 92, VI 334, IX 9
Oldenlandia = Houstonia spp. (HOUSTONIA) -- IX 404, XI 60, 61
Oldenlandia caerulea = Houstonia caerulea (BLUETS) -- XI 23
Oldenlandia purpurea var. longifolia = Houstonia longifolia (LONG-LEAVED HOUSTONIA) -- IX 472
Olive = Olea europaea (OLIVE) -- i 65, I 69, II 197, 433
Onion (stem) = Allium spp. (ONION, LEEK, GARLIC) -- IV 303
Onoclea = Onoclea sensibilis (SENSITIVE FERN) -- VI 302, 382, 454, X 86, 100, XII 360
Onoclea sensibilis (SENSITIVE FERN) -- V 405
Onopordum acanthium (COTTON THISTLE, SCOTCH THISTLE) -- see Thistle (Scotch)
ORACH = Atriplex spp.
Orchidaceae (ORCHID FAMILY) -- XII 326
Orchis = Habenaria spp. (REIN ORCHIS) -- IV 104, 122, 164, 297, V 232, 260, 324, 336, VII 411, VIII 377
Orchis (Dwarf) = Habenaria flava (PALE GREEN ORCHIS) -- IV 128
Orchis (Fringed Purple) = Habenaria fimbriata (LARGE PURPLE FRINGED ORCHIS) -- IV 103
Orchis (Great) = Habenaria fimbriata (LARGE PURPLE FRINGED ORCHIS) -- IV 271, V 244, VI 360
Orchis (Great Fringed) = Habenaria fimbriata (LARGE PURPLE FRINGED ORCHIS) -- V 232, VI 337
Orchis (Great Purple) = Habenaria fimbriata (LARGE PURPLE FRINGED ORCHIS) -- IX 491
Orchis (Great Purple Fringed) = Habenaria fimbriata (LARGE PURPLE FRINGED ORCHIS) -- V 247, XII 208
Orchis herbiola = Habenaria flava (PALE GREEN ORCHIS) -- IV 128
Orchis lacera = Habenaria lacera (RAGGED FRINGED ORCHIS) -- VIII 409, XI 129
Orchis (Large Purple) = Habenaria fimbriata (LARGE PURPLE FRINGED ORCHIS) -- IV 258
Orchis psycodes = Habenaria psycodes (SMALLER PURPLE FRINGED ORCHIS) -- IV 271
Orchis (Purple) = Habenaria fimbriata (LARGE PURPLE FRINGED ORCHIS) -- IV 117, 122, 128, 200
Orchis (Ragged) = Habenaria lacera (RAGGED FRINGED ORCHIS) -- II 332, IV 229, V 316
Orchis (Smaller Fringed) = Habenaria psycodes (SMALLER PURPLE FRINGED ORCHIS) -- VI 401
Orchis (Small Purple) = Habenaria psycodes (SMALLER PURPLE FRINGED ORCHIS) -- IV 268, V 323, 345
Orchis (Small Purple Fringed) = Habenaria psycodes (SMALLER PURPLE FRINGED ORCHIS) -- IV 273, 285, V 337, VIII 426, IX 498
Orchis (Smaller Round-leaved) = Habenaria hookeri (HOOKER'S ORCHIS) -- VIII 377
Orchis (White) = Habenaria blephariglottis (WHITE FRINGED ORCHIS) -- V 345, VI 408, XII 238, 257
Orchis (White Fringed) = Habenaria blephariglottis (WHITE FRINGED ORCHIS) -- IV 295, (297), V (316), XI 83
Origanum = Origanum vulgare (WILD MARJORAM) -- XIII 378
Orobanche = Orobanche uniflora (ONE-FLOWERED CANCER-ROOT) -- VII 407, VIII 355, 358
Orobanche uniflora (ONE-FLOWERED CANCER-ROOT) -- IV 97, 102
Orpine (Garden) = Sedum telephium (LIVE-FOREVER)/Sedum purpureum (LIVE-FOREVER) 2 -- IV 268, 430, V 362
Oryzopsis canadensis 220 = Oryzopsis pungens (SHORT-AWN MOUNTAIN RICE) -- XII 173
Oryzopsis Grass = Oryzopsis pungens (SHORT-AWN MOUNTAIN RICE) -- XIII 280
Oryzopsis pungens (SHORT-AWN MOUNTAIN RICE) -- see Oryzopsis canadensis, Oryzopsis Grass
Osier = Salix spp. (WILLOW)/Cornus spp. (DOGWOOD) 222 -- i 154, I 165, V 3, 181, VI 172, VII 212, 255, 269, 281, 323, VIII 28, 39, 49, 82, 181, 244, 276, 313, 443, 446, IX 251, X 305, XI 401, 430, XII 28, 32, 55, 68, 84, 138, 176, XIII 24, 170, 204, 208
OSIER (PURPLE) = Salix purpurea
Osier (Red) = Cornus stolonifera (RED-OSIER DOGWOOD) -- II 124, III 371, 397, IV 97, 173, V (3), VIII 139, XI 294, 297
Osier (Yellow) = Salix alba (WHITE WILLOW) -- VI 86
Osmorhiza brevistylis = Osmorhiza claytoni (SWEET CICELY) -- XI 6
Osmorhiza claytoni (SWEET CICELY) -- see Osmorhiza brevistylis
Osmunda = Osmunda spp. (FLOWERING FERN) -- IV 33, 73, V 397, 478, X 149, 154, XII 357, 370
Osmunda cinnamomea (CINNAMON FERN) -- V 405, VI 235, 306, 316, IX 483, XII 360
Osmunda claytoniana (INTERRUPTED FERN) -- VI 266, IX 483, XII 360
Osmunda regalis (ROYAL FERN) -- X 86, 237, 495, XI 197, 207, XII 360, XIII 331, 387
Osmunda spectabilis = Osmunda regalis (ROYAL FERN) -- V 289, 405, VI 210, 306
Osmunda (Tall) = Osmunda cinnamomea (CINNAMON FERN) -- V 405
Ostrich Fern = Pteretis pensylvanica (OSTRICH FERN) -- V 405
Ostrya = Ostrya virginiana (EASTERN HOP-HORNBEAM) -- IV 49, V 126, 138, 160, VI 243, 255, 258, 299, 485, VII 354, X 100, 510, XI 308
Ostrya virginiana (EASTERN HOP-HORNBEAM) -- see Hop-hornbeam, Iron-wood, Lever-wood, Ostrya, Ostrya virginica
Ostrya virginica = Ostrya virginiana (EASTERN HOP-HORNBEAM) -- IV 477, V 116
OSWEGO TEA = Monarda didyma
Oxalis = Oxalis spp. (WOOD-SORREL) -- IV 354, 356, VI 325, VII 407, VIII 374
see also Wood-sorrel
Oxalis acetosella = Oxalis montana (COMMON WOOD-SORREL) -- IV 302, IX 69, 79, 491, XI 16, 36, 60
Oxalis europaea (YELLOW WOOD-SORREL) - see Oxalis stricta, Oxalis (Yellow), Wood-sorrel (Yellow)
Oxalis montana (COMMON WOOD-SORREL) -- see Oxalis acetosella
Oxalis stricta (old usage) = Oxalis europaea (YELLOW WOOD-SORREL) 340 -- II 389, IV 95, VIII 389, IX 370, 385
Oxalis violacea (VIOLET WOOD-SORREL) -- IX 409, X 482
Oxalis (Yellow) = Oxalis europaea (YELLOW WOOD-SORREL) -- V 432
Oxyria digyna (MOUNTAIN SORREL) -- XI 30, 60
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-- Revised: April 25, 2008
Created by: Ray Angelo
rangelo@oeb.harvard.edu