298 



STANDARDIZED PLANT NAMES 



Oleaster Rus- 

 sian-olive: Elaeagnus angustifolia 

 Oleaster Pear . Pyrus elaeagrifolia 



Olive Olea 



Common O O. europaea 



For cultivated varieties of Olive, see 

 American Pomological Society's List of 

 Fruits, in Appendix. 



False-olive 



Elaeodendron ; E. orientale 

 Russian-olive 



Elaeagnus angustifolia 

 Spurge-olive 



Cneorum; C. tricoccum 

 Olive Daphne . . Daphne oleoides 

 Oliveleaf Willow 



Salix cinerea oleifolia 

 Olympic 'Aubrietia, Olympic Col- 

 umbine, etc. See Aubrietia, 

 Columbine, etc. 

 OMPHALODES .... Navelseed 

 cornifolia (cappadocica) 



Dogwood N 

 linifolia {Cynoglossum linifolium) 

 Flaxleaf N. 



vema Venusbutton 



Hort. var. of Omphalodes: 

 White Venusbutton (0. vema 

 alba^ Cy) 

 ONCIDIODA 



See ORCHID GENERA. 



ONCIDIUM 



See ORCHID GENERA. 



One-flower Hawthorn 



Crataegus uniflora 



One-leaf Locust (Rohinia pseudo- 

 acacia monophijlla'\ Cy) 



Onion Allium ; A. cepa 



Chive .... A. schoenoprasum 



Garlic A. sativum 



Leek A. pomim 



Nodding O A. cerauum 



Sea-onion . . Urginea; U. scilla 

 Shallot . . Allium ascalonicum 

 Welsh O A. fistulosum 



ONOCLEA 



sensibilis . . . Sensitive Fern 

 struthiopteris . Pteretis nodulosa 



ONOPORDON {ONOPORDUM Ag) 



Cottonthistle 



tauricum Taurus C. 



BOLD-face=approved scientific names. 



Ontario Lobelia . . Lobelia kalmi 



ONYCHIUM Clawfern 



japonicum .... Japanese C. 



OPHIOGLOSSUM . Adderstongue 

 vulgatum Common A. 



OPHIOPOGON . . . Snakebeard 



jaburan Jaburan 



japonicus . Japanese Snakebeard 



Hort. vap. of Ophiopogon: 

 GoLDSTRiPE Jaburan (0. jaburan 

 aureus variegatus Cy) 



Opium Poppy . Papaver somniferum 



OPLISMENUS 



compositus (0. hirtellus Cy; Pani- 

 cum variegatum) . Basket Grass 



Often miscalled O. hirtellus, a species not 

 in cultivation. 



OPUL ASTER Ag PHYSOpARPUS 

 OPUNTIA Prjcklypear 



arbor escens . . . . O. imbricata 



arenaria .... Sand Cactus 



basilaris .... Beavertail C 



bigelovi 



brasiliensis 



compressa . Common Pricklypear 



emoryi 



engelmanni 



ficus-indica 



fragilis 



imbricata (arborescens) 



Walkingstick Cactus 



leptocaulis | 



leucotricha . . Aaronsbeard C. 



mesacantha 



microdasys 



monacantha O. vulgaris 



phaeacantha 



polyacantha 



robusta 



subulata (Pereskia subulala) 



tomentosa 



tuna 



vulgaris {monacantha) 

 Orach 



Garden O. . . Atriplex hortensis 

 Orange Citrus sinensis 



Cherry-orange Citropsis species 



Hardy O Citrus trifoliata 



King O C. nobilis 



IT Allc^synonyms or unapproved names. 



