240 MISC. PUBLICATION 303, U. S. DEPT. OF AGRICULTURE 



Robinia kelseyi Cowell. 



Range: 27. 



Site : Well-drained, sun. 



Fruit : Legume. 



A small to large, spreading, spiny shrub ; flowers May-June ; 80,640 seeds per 

 pound. 



Robinia longiloba Ashe. 



Range: 27, 28. 



Site : Dry, well-drained, sun. 



Fruit : Legume. 



A small shrub ; flowers in May ; spiny or unarmed ; seldom produces fruit, 

 propagates extensively by suckering, but never forms extensive thickets. Pos- 

 sibly a hybrid between R. boyntonii and R. grandiflora. 



Robinia luxurians, see Robinia, neomexicana. 



Robinia nana Ell. 



R. hispida nana (Ell.) Torr. and Gray. 

 Range: 28, 29, 30. 

 Site : Dry, well-drained, sun. 

 Fruit : Legume. 



A small shrub ; occurs in sandy and other soils ; spiny or unarmed ; usually 

 little branched. 



Robinia neomexicana Gray. New Mexican locust. 



Range: 9, 10, 11, 14. 

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

 Fruit : Legume, available September-October. 



A small to large, spiny shrub ; thicket forming on drier, rockier slopes ; hardy 

 as far northward as New England ; in cultivation in the Eastern States and 

 western Europe; 21,800 seeds per pound. 



Var. luxurians Dieck, (R. luxurians (Dieck) Rydb.) is a small tree occurring 

 within the range of the species. 



Stomach records: Gambel quail (?) ; mountain sheep, porcupine, black-tailed 

 deer; Coeur d'Alene chipmunk. Observations: Porcupine, mule deer. An im- 

 portant goat browse ; somewhat cropped by horses and cattle without harmful 

 effects. 



Robinia pallida Ashe. 

 Range: 27. 



Site: Well-drained, sun. 

 Fruit : Legume. 

 More commonly a small, or sometimes a large shrub ; reproduces by suckers. 



Robinia pedunculata Ashe. 



Range: 27. 



Site: Dry, well-drained, sun. 



Fruit : Legume. 



A large shrub ; spiny or unarmed. Possibly a hybrid between R. hispida and 

 R. boyntonii. 



Robinia pseudoacacia L. Black locust. 



Range : 1, 2, 3, 4, 5, 6, 7, 8, 12, 15, 16, 20, 21, 22, 23, 25, 26, 27, 28, 29. 

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

 Fruit : Legume, available September-April. 



A large, short-lived tree ; somewhat tolerant of alkali ; much attacked by locust 

 borer, but apparently the greater the growth rate the less borer trouble ; wood of 

 importance commercially, particularly for fence posts ; root system extremely 

 shallow ; easily transplanted when young ; makes its best growth on fertile soil ; 

 on very poor soils makes poor growth and does not reach large size ; rapid grow- 

 ing on good soils, slow growing on poor soils ; seriovisly injured by fungi ; not 

 resistant to fire; coppices freely; 20,000-26,000 seeds per pound. Range much 

 extended by cultivation ; original range not clear. 



Var. rectissima Raber, the shipmast locust, is a tree to 100 feet, occurring on 

 the richer soils of the northern and western parts of Long Island, and locally in 

 New York and Massachusetts. The trunk is columnar, very straight and yields 

 a wood which is harder and more durable than that of the species. It is longer 

 lived than the species, produces almost no seed, and propagation is by root 

 cuttings and root sprouts. May possibly be more resistant to the attacks of the 



