INDEX. 



419 



PAGE 



NartJieeium glutinosum, MX 44 



pusillum, MX 43 



Nasturtium 300 



obtuanm, Nutt 301 



palustre,* DC. var 300 



Ne-illia opulifolia, Benth. & Hook. 318 



Nemophila 343 



Menziesii, Hook. & Arn 343 



Neottia cernua, Puisb 8 



pubescen.s, Pursh 



repens, Pursh 9 



Nephrodium acrostichoid.es, Michx. . 277 



asplenoides, Michx 267 



bulbiferum, Michx 280 



crislatum, Michx 273 



iJryopteris, Michx 270 



Fttix-fcemina, Michx 267 



Filix-mas, Rich 274 



fragrans, Rich 276 



Goldieanum, Hook. & Grev . . . 273 



marginale, Michx 274 



punctilobulum, Michx 285 



rufidulum, Michx 283 



rigidum, Desv 274 



spinulosum, Desv 275 



tenue, Michx 279 



Thelypteris, Desv 272 



Thelypteroides, Michx 271 



Nuphar 300 



ad vena, Ait., var. minor, 



Morong 300 



luteum, Smith, var. (?) 300 



Nymphaea 300 



odorata, var. minor, Sims 300 



pygmasa, Ait 300 



reniformis, DC.. 300 



tetragona, Georgi 300 



tuberosa, Paine 300 



Oakesia, Watson 365 



sessilifolia, Wat 45, 365 



(Enanthe 327 



sarrnentosa, Presl 327 



Omphalodes, Tourn 344 



nana, Gray 344 



Onobrychis...." 317 



sativa, Lam 317 



Onoclea, Linn 281 



nodulota, Schk 281 



sensibilis, Linn 281 



Struthiopteris, Hoff. 281 



OPHIOGLOSSACELE (cxx.) 253 



Ophioglossum, Linn 253 



vnlgatum, Linn 253 



Ophrys cernua, MX 8 



corallorhiza, MX 5 



cordata, MX 6 



Oplismenus Crus-galli, Kunth 177 



muricatus, Kunth 1 77 



OBGHIDAGEUB (cm.) 2 



Orchis, Linn 12 



PAGE 



aristata, Fiscb 12 



blephariglottis, Pursh 19 



bracteata, Pursh 14 



ciliaris, Pursh 18 



davellata, MX 13 



dilatata, Pursh 15 



fimbriata, Pursh 19 



fusee ftcens, Pursh 13 



humilis, MX 12 



hyperborea, Pursh 14 



incisa, Pursh 19 



lacera, MX 19 



latifolia, Linn 12 



leucophsea, Nutt 19 



obtusata, Pursh 16 



orbiculata, Pursh 18 



psycodes, Pursh 19 



rotundifolia, Gray 12 



spectabilis, Linn 12 



tridenlata, Pursh 13 



Orthocarpus 348 



castilleioides, Benth 348 



tenuifolius 348 



Oryzopsis, Michx 192, 390 



asperifolia, MX 192 



asperifolia, Kunth 193 



Canadensis, Torr 192 



cuspidata, Benth 193, 390 



melanocarpa, Muhl 193 



parwflora, Nutt 192 



Osmorrhiza 327 



Occident alis, Torr 327 



Osmunda, Linn 286 



cinnamomea, Linn 286 



Claytoniana, Linn 286 



interrupta, Michx 286 



lis, Linn 286 



var. spectabilis, Milde. 286 



spectabilis, Willd. . 286 



Oxycoccus 338 



vulgaris, var. .intermedium 



Gray 338 



Panicum, Linn 176, 389 



agrostoides, Spreng 176 



capi Hare, Linn , 177 



clandestinum, Hook 179 



Crus-galli, Linn 177 



var. hispidum, Ell 177 



depauperatum, Muhl 177 



dichotomum, Linn 178 



var. nitidurn, Lam 178 



var. pubescens, Gray.... 178 



var. sphssrocarpon, Gray. . 179 



elongatum, Pursh 176 



glabrum, and 178 



glaucum, Linn 1 80 



involutum, Torr 177 



latifoliurn, Linn 179 



laxiflorum, Lam 179 



