Nits-and-lice, 1140 

 Nodding 



-bluegrass, 190 



-fescue, 179 



-ladies' tresses, 727 



-nixie, 5, 689 

 Nogal, 772, 774 



-morado, 774 



-silvestre, 772 

 Northern 



-crabgrass, 283 



-frog-fruit, 1403 



-manna-grass, 183 



-reedgrass, 226 



-wild rice, 277 

 Nuez encarcelada, 774 

 Nuphar, 3, 4, 7, 900, 906 



advena, 906 

 tomentosa, 906 



luteum, 4 



macrophyllum, 906 

 ozarkanum, 906 

 polysepalum, 906 



microcarpum, 906 



ovatum, 906 



polysepalum, 906 



puberulum, 906 

 Nut-grass, 454 



yellow-, 456 

 Nut-rush, 489 

 Nutmeg hickory, 774 

 Nuttall's water-hemp, 864 

 Nymphaea, 3, 4, 7, 900, 

 901 



elegans, 902 



flava, 902 



lekophylla, 902 



mexicana, 902 



microcarpa, 906 



odorata, 902 

 gigantea, 902 

 villosa, 902 



ovata, 906 



puberula, 906 



spiralis, 902 



tuberosa, 902 

 Nymphaeaceae, 734, 900 

 Nymphoides, 7, 9, 1312, 

 1331 



aquatica, 1331 



peltata, 1331 

 Nyssa, 1262 



aquatica, 1265 



biflora, 1265 



sylvatica 



biflora, 1265 

 caroliniana, 1265 

 dilatata, 1265 

 sylvatica, 1265 



uni flora, 1265 



Oak, 783 



bur-, 784 



Jerusalem-, 854 



laurel-, 787 



overcup-, 784 



pin-, 786 



poison-, 1093 



Spanish-, 785 



water-, 787 



willow-, 786 

 Oatgrass, 224 



timber-, 224 

 Obedient-plant, 1422 

 Oenothera, 1194, 1365 



biennis, 1198 

 biennis, 1198 

 canescens, 1198 

 hirsutissima, 1198 



canescens, 1197 



flava, 1197 



Hookeri, 1198 

 Hewettii, 1198 

 irrigua, 1198 

 hirsutissima, 1198 



Jamesii, 1199 



Kunthiana, 1197 



longissima, 1199 

 Glutei, 1199 



pratincola, 1198 



rhombipetala, 1198 



rosea, 1197 



sessiUs, 1194 



Simsiana, 1198 



tetraptera, 1194, 1197 



texensis, 1197 

 Okra, 1113 



Old-man's beard, 1307 

 Oldman-whiskers, 1034 

 Oldenlandia 



Boscii, 1545 



corymbosa, 1548 



uniflora, 1545 

 Oleaceae, 1301 

 Olive, desert-, 1308 

 Olive family, 1301 

 Ombligo de Venus, 1216 

 Onagraceae, 1175 

 One-seeded bur-cucumber, 



1571 

 Onion, 655 

 Onoclea, 65 



sensibilis, 65 

 Operculina, 1354 



dissecta, 1359 

 Ophioglossaceae, 47 

 Ophioglossum, 49 



crotalophoroides, 49 



Engelmannii, 50 



nudicaule 

 tenerum, 50 



palmatum, 49 



petiolatum, 50 



pusillum, 49 



vulgatum, 50 

 Engelmannii, 50 

 O'possum-wood, 1299 

 Opulaster monogynus, 



1016 

 Orange sneezeweed, 1678 

 Orchard grass, 202 

 Orchid 



American frog-, 711 



crested fringed-, 5, 700 



family, 690 



frog-, 711 



long-bracted-, 711 



ragged fringed-, 695 



satyr-, 71 1 



small wood-, 5, 710 



snowy-, 5, 700 



water-spider-, 697 



white fringed-, 697 



yellow fringed-, 5, 697 



yellow fringeless-, 700 

 Orchidaceae, 690 

 Oregano de burro, 1401 

 Orontium, 560 



aquaticum, 560, 563 

 Orpine, 997 



family, 994 

 Orthocarpus, 1508 



luteus, 1508 

 Oryza, 271 



sativa, 271 

 Osmunda, 51 



cinnamomea, 51 



regalis 



spectabilis, 51 

 Osmundaceae, 51 

 Osmorhiza, 1223 



longistylis, 1223 

 villicaulis, 1226 

 Ostrya, 778 

 Ottelia alismoides, 169 

 Overcup oak, 784 

 Owl-claws, 1678 

 Owl clover, 1508 

 Oxypolis, 1251 



Fendleri, 1253 



filiformis, 1251 



rigidior, 1251 

 Oxyria, 796 



digyna, 796 

 Oxytria crocea, 655 

 Oxytrope, rock-loving, 



1063 

 Oxytropis, 1062 



Lambertii, 1063 

 articulata, 1063 



1762 



