NATIVE WOODY PLANTS OF THE UNITED STATES 175 



Odostemon fremontii, see Herberts fremontii. 

 Odostemon haematocarpus, see Herberts haematocarpa. 

 Odosteman nervosus, see Berberis nervosa. 

 Odostemon nevinii, see Herberts nevinii. 

 Odostemon nutkanus, see Herberts aquifolium. 

 Odostemon pumilus, see Berberis pumila. 

 Odostemon repens, see Berberis repens. 

 Odostemon trifoliolatus, see Berberis trifoliolata. 

 Odostemon wilcoxii, see Berberis wilcoxii. 



Olneya tesota Gray. Desert ironwood. 



Range: 10, 11. 



Site: Dry, well-drained, sun. 

 Fruit: Legume, available August-September. 



A large shrub to small or large tree; flowers May-June; evergreen; some- 

 what spiny ; foliage rather dense ; 2,000 seeds per pound. 



Observations: Hooded orioles ; hummingbirds ; much used as roosts by Gambel 

 quail ; bighorn. 



The species is attacked by a mistletoe (Phoradendron calif ornicum) which 

 produces fruits attractive to many berry-eating birds. Of some value as a 

 forage for livestock. 



Oplopanax horridum (Small) Miquel. Devilsclub. 



Fatsia horrida (Small) B. and H., Echinopanax horridum Decne. and 

 Planch., Ricinophyllum horridum (Small) Nels. and MacBr. 

 Range : 1, 2, 4, 12, 13, 24. 

 Site: Dry, well-drained, moist, shade. 

 Fruit: Drupe, available July-October. 



A large, straggling, large-leafed, very thorny shrub ; flowers May-June. 

 Observations: Preferred food of Olympic wapiti. 



Opulaster alabamensis, see Physocarpus stellatus. 



Opulaster alternans, see Physocarpus alternans. 



Opulaster australis, see Physocarpus opulifolius. 



Opulaster bracteatus, see Physocarpus bracteatus. 



Opulaster capitatus, see Physocarpus capitatus. 



Opulaster glabratus, see Physocarpus glabratus. 



Opulaster intermedius, see Physocarpus stellatus and P. opulifolius. 



Opulaster monogynus, see Physocarpus monogynus. 



Opulaster opulifolius, see Physocarpus opulifolius. 



Opulaster pauciflorus, see Physocarpus malvaceus. 



Oreocallis davisiae, see Leucothoe davisiae. 



Osmanthus americanus (L.) Benth. and Hook. Devilwood. 



Amarolea americana (L.) Small. 

 Range: 29, 30. 



Site : Well-drained, moist, sun, shade. 

 Fruit : Drupe, available in September. 



Usually a large shrub to small tree or rarely a large tree ; evergreen ; often 

 occurs in sandy soil ; flowers March-April. 



Osmaronia cerasiformis (Torr. and Gray) Greene. Oso berry. 



Nuttallii cerasiformis Torr. and Gray. 

 Range : 1, 2, 4. 

 Site : Well-drained, shade. 

 Fruit: Drupe, available July-August. 



A small to large shrub; flowers March-April; fruit pulp bitter in some 

 regions, sweet in others, but not poisonous. 



Observations: Greedily eaten by many birds and mammals. Apparently of 

 little value as forage for livestock. 



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