INDEX. 



803 



Oryza clandestina A. Br 54 



Ori/zopsis MiCilX 57 



Oryzopsis asperifolia Kunth. . 58 



Oryzopsis asperifvlia MiCHX... 58 



Oryzopsis canadensis Tokk... 58 



Oryzopsis juncea (Micnx.) 58 



Oryzopsis melanocarpa Muhl. . 58 



Oryzopsis parviflora Hook 58 



Osmia Sen -Bip 501 



Osmodiura Raf 436 



Osmorhiza Eaf 398 



brpvistylis DC 398 



. clavtoni BSP 398 



cordata Raf 398 



dulcis Raf 398 



longistylis DC 398 



villosa Raf 398 



Ostericum Hoff 391 



Ostrya Scop 186 



ostrya (Linn.) 187 



Ostrya virgiaiana Koch 187 



Ostrya virginica Willp 187 



Otacliyrium Nfes 49 



Otaria HBK 423 



Otophylla Benth 468 



michauxii Benth 468 



Ototropis Nees 319 



Oxalidaceae 334 



Oxalideae ( Trib.) B. and H . . . . 333 



Oxalis Linn 334 



Oxalis corniculata var. stricta 



Sav 334 



dillenii Jacq 334 



tlorida Salisb .334 



Oxalis longijlora LiNN 335 



Oxalis lyoni Puksh 334 



Oxalis stricta Linn 334 



Oxalis vespertilionis Gray. . . 335 



violacea Linn 335 



Oxyacantha Rupp 287 



Oxybaphus L'Hek 216 



angustifolius Sweet.. . . 216 



hirsutus Sweet 217 



nyctagineus vSweet 217 



Oxybasis Kar. and Kir 211 



Oxycaryum Nees 96 



Oxycocciis LuDW 408 



Ox'ycoccus hispidulus Pers. . . 407 



Oxycocciis macrocarpus (Ait.) . . 409 



oa;?/cocCT<s (Linn.) 409 



Oxy coccus palustris Pers 409 



vulgaris PuRSH 409 



Oxydium Benn 319 



Oxygraplds Uunge 241 



cymbalaria (PuRsn) 241 



Oxylepis Benth 547 



Oxypogon Raf 315 



Oxypolis Raf 391 



denticulata Raf 391 



rigida Raf 391 



tricuspidata Raf 391 



Oxyraniphis Wall 317 



Oxys TouRN 334 



Oxy tropis DC 322 



Oxytropis hookeriana Nlttt. . 323 



lamberti Pursh 323 



splendens Doug 322 



Ozoroa Del 345 



P 



Pachiloma nuttallii Raf 389 



Pachycarpus E. Mey 423 



Pachylooia Spach : . 241 



Pachylophus Spacii 380 



Pachypodiuni Nutt 256 



Pachypodium Wei?b 257 



Padus cartilaginea Roem 306 



densiflora Roem 307 



flmbriata Roem 307 



hi rsuta Roem 307 



micrantha Roem 307 



oblonga Moench 307 



obovata Roem 307 



rubra Mill 307 



serotina Agh 306 



virginiana Roem 306 



Palavia Cav 216 



Paleya Cass 567 



Palimbia Bess 390 



Paliurus Adans 355 



Palladia Moench 412 



Pallavicinia DeNot 458 



Pallinia scoparia Spreng 48 



Palmerella Gray 497 



Paltoria R. and P 349 



Panax americanum Raf 386 



lanceolatum Raf 385 



quinquefolium Linn 386 



trifolium Linn 385 



Panicularia Fabr 80 



americana (Torr. ) 81 



Panicularia aquatica OK 81 



Panicularia canadeyisis ( MiCHX. ) 82 



elongata (Torr.) 82 



fluitans (Linn.) 80 



nervata ( Willd. ) 81 



Panicum Linn 48 



agrostoides Muhl 51 



Panicum autumnale Bosc 52 



barbulatura Michx 50 



Panicum capillare Linn 52 



Panicum clandestinum Hook. 51 

 Panicum crus-galli var. hispidum 



(Muhl.) 49 



depauperatum M i;hl 50 



Panicum d icho tom i florum 



MiCHx 52 



Panicum dichotomum Linn 50 



dichotomum var. pubescens 



(Lam.).. 50 



Panicum divergens Muhl 52 



elongatum Pursh 51 



fragile Kunth 52 



hispidum Muhl 49 



involutumToRR 50 



Panicum latifolium Linn 51 



Panicum laxiflorum Lam 50 



microcarpon Muhl 50 



