466 



Opuntia zebrina — Otoxerus 



Opiintia zebrina Small 274 



■ — zacuapanensis 274 



Opuntieae 277 



Orania 233 



Orcliiaceras 232 



Orcliicoeloglossum mixtum Asch, et 



Graeb. 208, 220, 558 

 Orchidaceae 200, 202, 208, 214, 215, 



217, 219, 222, 223. 224, 225, 226, 



227, 228, 229, 232 

 Orcliis 227 



— aristata 863 

 — • cordiger 209 



— cruenta O. F. Miicll. 230, 863 



— elata 221 



— elodes Griseb. 207, 211 



— ericetorum Linton 207, 230 



— Fuehsii Dnice 230 



— fusca 231 



— hircina 207, 219 



— incarnata 214, 230, 526 

 — ■ incarnata X latifolia 214 



— incarnata X maculata 214 



— kiraisUieusis Hayata 202 



— latifolia 210, 211, 230 

 — • dmiensis Rchb. f. 214 



— maculata 204 



— laxiflorus Lam. 203, 208 

 — • longicruris 536 



— maculata 211, 230 



— — alba 208 



■ — ■ maculata X Coeloglossum viride 

 220 



— mascula 212 



■ — militaris X Aceras anthropophora 

 232 



— Munbyana 221 



— O'Keliyi 230 



— praetermissa Driice 210, 211, 219, 

 230 



— purpurella Stephens. 230, 231 



— purpureus x Aceras anthropophora 

 232 



— simia 221 



— • spectabilis 202 

 — • tenthredinifera 208 

 — ■ Traunsteineri 214 

 Oreobolus 157 

 Oreocarya 266, 378 

 Oreocereus 278 



Oreocereus Celsianus (Lern.) Rice. 274 



Oreocnide 115 



Oreodapline foetens 384 



Oreomunea pterocarj)a 847 



Oreorchis 227 



Origanum vulgare 16, 381 



Ormosia 115, 116 



Ornithidium 226 



Ornithocephalus 226 



— • grandiflorus 231 



Ornithogalum 106 



— • divergens 197 



— • refractiim 197 



— umbellatum 197 

 Ornithopus 396 

 Orobanchaceae 430 

 Orobanche 430 



— cernua var. australiana 430 



— cumana II, 115 



— speciosa 438 

 Orobus tuberosus II, 92 

 Orthilia 76 

 Orthosiphon 381 

 Orthrosanthus 189 

 Orychophragmus violaceus 335 

 Oryza 166 



— sativa P. II, 110, 112 

 Oryzopsis 177, 179 

 Osbeckia 103, 109, 414 

 Osmanthus 429 



— bibracteatus 428 

 — • daibuensis 428 

 — • gamostromus 428 



— Matsudai 428 

 Osmelia 115 

 Osmunda cinnamomea 4 



— regalis 14 



var. spectabilis 4 



Osmundites II, 20 



— Kidstoni II, 20 

 Ostrya 120, 261 



— ■ japonica Sargent 260 



Oswahlia Rangel N. G. II, 218, 308 



— icarahyensis Rangel* II, 218 

 Oswaldina Rangel N. G. II, 218, 308 



— icarahyensis Rangel* II. 218 

 Otantliera 115 



Otocarpus 341 

 Otophylla 495 

 Otoxerus II. 218 



