146 M ISC. PUBLICATION 303, U. S. DBPT. OF AGRICULTURE 



Juglans cinerea L. Butternut. 



Range : 18, 19, 21, 22, 23, 24, 25, 26, 27, 28. 

 Site : Well-drained, sun. 

 Fruit: Nut, available September-November. 



A large monoecious tree; root system deep with a deep taproot, but rather 

 widespreading; rapid growing, especially when young; short lived; foliage 

 much injured by defoliating insects ; very susceptible to fire damage ; wind-firm, 

 but easily storm damaged ; ordinarily occurs on rich soils but will grow on some- 

 what poorer and drier soils than J. nigra; wood somewhat used commercially ; 

 heartwood durable; propagation is by seed stratified in the fall and sown in 

 spring; 16-40 seeds per pound, germination 80 percent; somewhat difficult to 

 transplant; sugar may be produced from this species as in sugar maple. 



Observations: White-tailed deer, cottontail rabbit, red squirrel, and other 

 squirrels. 



Juglans glabra, see Carya glabra. 



Juglans hindsii Jeps. Hinds walnut. 



J. californica hindsii Jeps. 



Range: 1, 3, 4. 



Site : Well-drained, sun. 



Fruit: Nut. 

 A large tree ; not resistant to walnut yellows ; 30 seeds per pound. 



Juglans major (Torr.) Heller. Arizona walnut. 



J. rupestris major Torr. 

 Range: 11, 16, 17. 

 Site: Well-drained, sun. 

 Fruit: Nut 



A small or large shrub to large tree ; taproot much developed, especially in 

 early stages ; at first rapid growing, later slower ; long-lived ; wood very durable 

 in contact with soil ; fruit borne abundantly every 2 or 3 years ; 45 seeds per 

 pound, germination 30-50 percent ; occurs in many kinds of soil. 

 Observations: Much eaten by squirrels and other rodents. 



Juglans myristicaeformis, see Carya myristicaeformis. 



Juglans nigra L. Black walnut. 



Range : 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30. 



Site: Well-drained, sun, sjbade. 



Fruit: Nut, available October-November. 



A large monoecious tree ; root system deep, widespreading ; will not grow on 

 dry or poor soils ; rapid growing, especially when young ; long-lived ; wind-firm ; 

 fire resistant ; foliage much attacked by caterpillars ; wood injured by borers ; 

 generally free from fungus attacks ; wood of great commercial value, very dur- 

 able ; begins bearing at 10 to 15 years of age ; propagation is by seeds stratified 

 and sown in spring ; about 25 seeds per pound, germination 90-95 percent ; much 

 cultivated. 



Observations: White-tailed deer, red squirrel, and other squirrels. Not pal- 

 atable to cattle. 



Juglans ovata, see Carya ovata. 



Juglans rupestris Engelm. Texas walnut. 



J. wMppleana Torr. 



Range : 11, 14, 16, 17, 19, 20, 29. 

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

 Fruit: Nut. 



A small to large shrub to small or rarely a large tree ; seedlings with a deep- 

 growing taproot, fairly rapid growing ; occurs commonly on limestone soils ; 

 may often form thickets; often branched to the base; fruit generally borne 

 in abundance every 2 or 3 years ; 75 seeds per pound. What was formerly 

 considered merely a western form of this species is here treated as J. major, 

 although it is often given only varietal rank and intermediate forms exist. 

 Observations: Rock squirrel; favorite food of Huachuca squirrel. 



Juglans whippleana, see Juglans rupestris. 



Juniperus spp. Junipers. 



Evergreen, commonly dioecious, or rarely monoecious trees or shrubs; fruit 



a berrylike cone maturing in 1 to 3 seasons. Some forms are of value commer- 



