NATIVE WOODY PLANTS OF THE UNITED STATES 175 
Odostemon fremontii, see Berberis fremontii. 
Odostemon haematocarpus, see Berberis haematocarpa. 
Odosteman nervosus, see Berberis nervosa. 
Odostemon nevinii, see Berberis nevinii. 
Odostemon nutkanus, see Berberis aquifolium. 
Odostemon pumilus, see Berberis pumila. 
Odostemon repens, see Berberis repens. 
Odostemon trifoliolatus, see Berberis trifoliolata. 
Odostemon wilcoxii, see Berberis wilcozvii. 
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 californicum) 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., EHchincpanaxz horridwm 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 paucifiorus, see Physocarpus malvaceus. 
Oreccallis davisiae, see Leucothoé 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. 
33772°—38——12 
