NATIVE WOODY PLANTS OF THE UNITED STATES 
175 
Odostemon fremontii, see Berleris fremontii. 
Odostemon haematocarpus, see Berleris haematocarpa. 
Odosteman nervosus, see Berheris nervosa. 
Odostemon nevinii, see Berde7'is nevinii. 
Odostemon nutkanus, see Berberis aquifoUum. 
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. 
Kange : 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 Physocarptis stellatus. 
Opnlaster alternans, see Physocarpus alternans. 
Opulaster australis, see Physocarpus opuUfolius. 
Opulaster bracteatus, see Physocarpus bracteatus. 
Opulaster eapitatus, see Physocarpus capitatus. 
Opulaster glabratus, see Physocarpus glabratus. 
Opulaster intermedins, see Physocarpus stellatus and P. opuUfolius. 
Opulaster monogynus, see Physocarpus monogynus. 
Opulaster opulifolius, see Physocarpus opuUfolius. 
Opulaster paueiflorus, see Physocarpus malvaceus. 
Oreocallis davisiae, see Leucothoe davisiae. 
Osmanthus americanus (L.) Benth. and Hook. Devilwood. 
Araarolea 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. 
130186°— 39 12 
