NATIVE WOODY PLANTS OF THE UNITED STATES 239 



Ribes wolfii Rothr. Rothrock currant. 



R. mogollonicum Greene. 

 Range: 13, 14. 



Site: Well-drained, moist, sun. 

 Fruit : Berry, available iu August. 

 A small to large shrub. Fairly good cattle browse iu Utah. 



Ricinella vaseyi (Coult.) Coult. and Fish. 

 Adelia vaseyi Coult. 

 Range: 17. 

 Site: Dry, sun. 

 Fruit: Capsule. 

 A small to large dioecious shrub ; sometimes spiny ; leaves few. 



Ricinophyllum horridum, see Oplopanax horridum. 



Ricinus communis L. Castor-bean. 



Range : 3, 5, 10, 17, 20, 30. 

 Site: Well-drained, sun. 



Fruit : Capsule, available August-September. 



A large shrub or rarely a small tree; probably introduced from Africa, but 

 more or less naturalized in the regions indicated ; herbaceous, and not escaping 

 northwards. 



Stomach records: Bobwhite, mourning dove. 



Riddelia cooperi, see Psilostrophe cooperi. 



Robinia spp. Locusts. 



Stomach records (in addition to specific records) : Seven species of birds 

 including ruffed grouse, bobwhite, western quail, and mourning dove. 



Robinia boyntonii Ashe. 

 R. hispida rosea Hort. 

 Range: 27. 



Site: Well-drained, sun. 

 Fruit: Legume. 



A large shrub or rarely a large tree ; flowers May-June ; probably does not 

 produce fruit ; very handsome when in flower. 



Robinia elliottii (Chapm.) Ashe. 

 R. hispida elliottii Chapm. 

 Range: 28, 29, 30. 

 Site : Dry, well-drained, sun. 

 Fruit: Legume. 

 A large, spiny shrub ; flowers May- June ; occurs on sandy and other soils. 



Robinia fertilis Ashe. 

 Range: 27. 



Site: Well-drained, sun. 

 Fruit : Legume. 

 A small to large, stoloniferous shrub ; fruit freely produced ; spiny or unarmed. 



Robinia grandiflora Ashe. 

 Range: 27. 



Site: Well-'drained, sun. 

 Fruit: Legume, available in July. 



A small to large shrub ; flowers April-May ; rarely spiny ; easily propagated by 

 root suckers which are extensively produced; occurs in sandy and other soils. 

 Robinia hartwigii Koehne. 



R. viscosa hartivigii (Koehne) Ashe. 

 Range : 27, 28, 

 Site: Well-drained, sun. 

 Fruit: Legume. 

 A large, spiny shrub ; flowers in June. 



Robinia hispida L. Rose-acacia. 



Range : 25, 27, 28. 



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



Fruit : Legume, available in September. 



A small to large, stoloniferous shrub ; spiny, or more commonly unarmed ; 

 foliage not dense ; tolerant of arid conditions ; commonly produces little fruit ; 

 propagates extensively by suckering. 



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