ORCHIS— OXALIS 



341 



ORCHIS Orchis 



rotundifolia Small Roundleaf O. 

 spectabilis {Galeorchis spedabilis 



Cy) Showy Orchis 



Oregon Ash, Oregon Crab, etc. See 



Ash, Crab, etc. 

 OREODOXA 



regia Cy .... Roystonea regia 

 Organpipe Cactus 



Pachycereus marginatus 

 Oriental Arborvitae, Oriental 

 Bittersweet, etc. See Arbor- 

 vitae, Bittersweet, etc. 



ORIGANUM Marjoram 



majorana Sweet M. 



vulgare Wild M. 



ORMOSIA Ormosia 



monosperma . . . Necklacetree 



ORNITHIDIUM 



See ORCHID GENERA. 



ORNITHOCHILUS 



fuscus 

 ORNITHOGALUM 



Star-of-Bethlehem 



arabicum Arabian S. 



Narbonne S. 

 . Pyramid S. 

 . Common S. 



narbonense . 



— pyramidale 



umbellatum . 

 OROBUS 



lathyroides . . . Vicia oroboides 



niger Lathyrus niger 



vernus L. vernus 



Orobus Vetch . . Vicia oroboides 

 ORONTIUM .... Goldencltjb 



aquaticum .... Goldenclub 

 OROXYLUM 



East Indian Trumpetflower 



indicum .... East Indian T. 



ORTHOCARPUS 



purpurascens 

 ORYZA Rice 



sativa Rice 



Osage-orange . . Madura pomifera 

 Osier 



Clasping Purple O. Hort. var. of 

 Salix purpurea. 



Common O. . . . Salix viminalis 



Lambert Purple O. Hort. var. of 

 S. purpurea. 



Osier, continued 



Purple O Salix purpurea 



Weeping Purple O. OS', purpurea 

 pe7idula\ Cy) 



OSMANTHUS . . . Osmanthus 



aquifolium Holly O. 



delavayi Del a v ay O. 



fortunei Fortune O. 



fragrans Sweet O. 



Hort. var. of Osmanthus: 



Golden O. (0. aquifolium aureus\\ 

 0. a. aureomarginatus Cy) 



Silver O. (0. a. argenteus\', 0. a. 

 argenteomarginatus Cy) 



OSMUNDA 



cinnamomea . . .Cinnamon Fern 



claytoniana . . . Interrupted F. 



regalis Royal F. 



Hort. var. of O. regalis: 



Slender Royal Fern (gracilis) 



OSTERDAMIA 

 ^ japonica (Zoysia japonica Cy) 



Japanese Lawngrass 



matrella (Z. matrella Cy) 



Manila Grass 

 tenuifolia (Z. tenuifolia Cy) 



Mascarene G. 

 Ostrich Fern . . Pteretis nodulosa 



OSTRYA HOPHORNBEAM 



virginiana (virginica) American H. 

 Oswego Beebalm . Monarda didyma 

 Oswego-tea . . . Oswego Beebalm 

 Otaksa Hydrangea ( Hijdrangea opu- 



loides otaksa] Cy) 

 OTHAKE Ag . . . . POLYPTERIS 



OTHONNA Othonna 



crassifolia (0. capensis Ag) 



Little-pickles 



OUVIRANDRA Ag 



APONOGETON 



OvERCUP Oak . . . Quercus lyrata 



OXALIS OxALis 



acetosella . Common Woodsorrel 



albiflora O. variabilis 



bowiei Bowie Oxalis 



cernua Buttercup O. 



comiculata .... Creeping O. 

 — atropurpurea (tropaeoloides) 



Nasturtium O. 



