P40 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 neomericana. 
Robinia nana Ell. 
R. hispida nana (Ell.) Torr. and Gray. 
Range: 28, 29, 80. 
Site: Dry, well-drained, sun. 
Fruit: Legume. 
A small shrub; occurs in sandy and other soils; spiny or unarmed; usually 
little branched. 
Robinia neoméxicana Gray. New Mexican locust. 
Range: 9, 10, 11, 14. 
Site: Dry, well-drained, moist, sun. 
Fruit: Legume, available September—October. 
A smali 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. luzurians (Dieck) Rydb.) is a small tree oceurring 
within the range of the species. 
Stomach records: Gambel quail (?); mountain sheep, porcupine, black-tailed 
deer; Coeur d’Alene chipmunk. Obdservations: 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 jiarge shrub; spiny or unarmed. Possibly a hybrid between R. hispida and 
R. boyntonii. 
Robinia pseudoacacia L. Black locust. 
Range? 152.73, 4, 5,6, 7, 8,12; 15) a6 20h 1 22 2325s 26nd oto: 
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; seriously 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 
