700 



Olinia radiata — Oxalis acetosella 



Olinia radiata 213 

 Olmedia maxima 308 

 Olpidium 555 



Olymposciadium Wolff* N. G. 68 

 Olyra 310 



— Hoehnei 310 

 Omphalea 254 



— Sargentii 247 

 Omphalocarpus 202 



Oncidium 301. 302. 303, 304. 321. 322 

 Onobrychis 61 



— saxatilis 61 



Onoclea struthiopteris 20, 33, 34 

 Ononis 56, 67 

 Onopordon tauricum 168 

 Onosma 78 

 Onychium N. A. 40 



— japonicum 34 

 Opegrapha N. A. 11 



— dolomitica Körb. 7 

 Ophioglossum N. A. 40 



— Aitchisonii 34 



— fibrosum 34 



— vulgatum 21 

 Ophiopogon 249 

 Ophrys 61 



— apifera 440 



— aranifera 440 



— fusca 61 



— lutea 61 

 Opiliaceae 326 

 Oplismenus 106 



Opuntia 102. 108. 277. 330. 350. 478 



— andicola 325 



— aoracantha 330 



— aurantiaca 330 



— camanchica 153 



— diademata 330 



— Dillenii 102, 178, 292 



— discata 102, 154 



— exaltata 102 



— floccosa 102 



— fulgida 102. 154 



— imbricata 599 



— keyensis 102 



— ovata 330 



— santarita 102 



— spinosior 154 



— sulphurea 330 



— tomentosa 599 



Opuntia tunicata 599 



— vivipara 102 



Orchidaceae 48, 101, 127, 228, 237, 249, 

 252, 256, 260, 261, 269, 270, 287, 298, 

 301, 302, 303, 310, 315, 317, 320, 358, 

 464 



Orchis 74 



— bifolia 440 



— flavescens 74 



— picta 55 



— Simia 440 

 Oreocarya 168 



— procera 168 

 Oreocereus 107 

 Oreodaphne foetens 54 

 Oreorchis 81, 82 

 Origanum virens 62 

 Orites 590 



Ormosia 306 

 Ornithoceplialus 297 

 Ornithogalum 55 



— unibellatuni 543 

 Oropetium tumaeum 229 

 Oroya 103 



Oryza sativa 492 

 Osbeckia 191 



— postpluvialis 191 

 Oscillaria 429 



— glaucescens 429 



— minima 429 

 Oscillatoria jenensis 525 

 Osmunda N. A. 40 



— bilinicata 23, ^4 



— Claytoniana 34 



— f. Mackiana Kikredge* 28 



— regalis 22, 34 

 Osteomeles 79 



Ostrya virginiana 141, 145 

 Ostrycarpus 190 

 Othomopsis 56 

 Otopappus 276 

 Otophylla 147 

 Ottoa 590 

 Ottonia 291 

 Ouratea 202 

 Ovularia 554 



— obliqua 554 

 Oxalidaceae 2^5, 290 

 Oxalis 204, 264, 329 



— acetosella 124 



