822 



INDEX. 



PAGE. 



Oak, Scarlet, 4^5 



Scrub, 407 



Scrub Chestnut, 410 



Spanish, 406 



Swamp Post, 409 



Swamp White, 409 



White, 408 



Willow, 40S 



Oat Grass, 231 



Obolaria, 643 



Oenothera, 583 



Oldenlandia 702 



Onoclea, 137 



Onosmodium, 659 



Ophioglossum 122 



Opulaster, 477 



Opuntia, 573 



Orache, Halberd-leaved, 429 



Sea Beach, 430 



Orange Grass, 557 



Orchis, Crane-fly, 378 



Orchis, Crested Yellow, 367 



Fringeless Purple, 369 



Green Fringed, 369 



Green Wood, 365 



lyarge Purple Fringed, 369 



Pale-green, 364 



Ragged, , 369 



Showy, 364 



Small Purple Fringed, 369 



Snowy, 366 



Southern Yellow, 365 



White Fringed, 36S 



Yellow Fringed, 367 



Orontium, 317 



Osmunda, . . 124 



Ostrya, 400 



Oxalis, 516 



Ox-eye, 768 



Oxycoccus, 627 



Oxygraphis, 457 



Oxypolis, 600 



Painted Cup 687 



Panax, 590 



Panicum, 189 



Panicum aciculare, 199 



aculeatum, 210 



addisoni, 205 



agrostoides, , 196 



amarum, 196 



anceps, 198 



angustifolium 199 



ashei, 208 



barbulatum 200 



boscii 211 



cserulescens, 200 



capillare, 195 



clandestinum, 211 



1 cl"1^ci, ' ig^ 



FACE. 



Panicum columbianum, 206 



commonsianum, 205 



commutatum, 20S 



condensum, 197 



cubense, 196 



cryptanthum, 210 



depauperatum 198 



dichotomum, 199 



dichotomiflorum, 195 



ensifolium, 207 



hemitomon, 194 



huachucae, 203 



lanuginosum 204 



latifolium, 211 



leucothrix, ., 202 



lindheimeri, 202 



linearifolium, 198 



lucidum, 200 



mattamuskeetense, 201 



meridionale, 203 



microcarpon, 200 



oligosanthes, 209 



oricola, 204 



philadelphicum, 195 



polyanthes, 208 



pseudopubescens, 205 



scabriusculum, 210 



scoparium, 209 



scribnerianum, 209 



sph'aerocarpon, 207 



spretura, 202 



stipitatum, 197 



tennesseense 203 



thinium 207 



tsugetorum, 206 



verrucosum, 194 



villosissimum, 204 



virgatum, 196 



wrightianum, 201 



Panicularia 240 



Pansy, Field, 572 



Papaver, : 460 



Papaw, 448 



Parietaria, 416 



Parker, C. F. 324 



Parnassia, 470 



Parsnip, ^gi 



Cow, 60 1 



Meadow, 595 



Purple Meadow 599 



Water. 597 



Parsonsia, 575 



Partridge Berry, 703 



Paspalum, , ige 



Pea, Beach, , 510 



Butterfly, gu 



Milk * 312 



Spurred Butterfly 510 



Pea-nut, Wild, gu 



^'each, , ^g^ 



