146 MISC. PUBLICATION 308, U. S. DEPT. OF AGRICULTURE 
Juglans cinerea L. Butternut. 
Range: 18, 19, 21, 22, 28, 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 grew on some- 
what poorer and drier soils than J. 2igra; wood somewhat used commercially: 
heartwood durable; propagation is by seed stratified in the fall and sown in 
spring; 16-40 seeds per pound, germination SQ percent: somewhat difficult to 
transplant; sugar may be produced from this species as in sugar maple. 
Observations: White-tailed deer, cottoniail rabbit, red squirrel, and other 
squirrels. 
Juglans glabra, see Carye glabra. 
Jugians hindsii Jeps. Hinds walnut. 
J. californica hindsit Jeps. 
Range: 1, 3, 4 
Site: Welldraimed, sun. 
Fruit: Nui. 
A large tree; not resistant to walnut yellows; 30 seeds per pound. 
Juglans major (Torr.) Heller. Arizona walnut. 
J. rupesiris mejor Torr. 
Range: 11, 16, 17. 
Site: Well-drained, sun. 
Frait: 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; 49 seeds per 
pound, germination 30-50 percent: eccurs In many Kinds of soil. 
Observations: Much eaten by squirrels and other redenis, 
Juglans myristicaeformis, see Carya myristicacformis. 
Jugians nigra L. Black walnut. 
Range: 18, 19, 20, 21, 22, 28, 24, 25, 26, 27, 28, 29, 30. 
Site: Welltirained, sun. shade. 
Fruit: Nut, available October-November. 
A large monoecious tree; reoet system deep, widespreading; will not grow on 
dry or poor sells: rapid growing, especially when young; leng-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 te 15 years of age: propagaiion 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 eatile. 
~ z iy a 
Juglans ovata, see Carve ovata. 
uglans rupestris Engeim. Texas walnut, 
J. whippieause, Torr. 
Range: 11, 14, 16, 17, 18, 20, 2. 
Site: Dry, welliireined, moist. sun. 
Froit: Nuit. 
A small to large shrub to small or rarely a large tree: seedlings with a deen- 
growing taproot, fairly rapid growing: occurs commonly en limestone sols; 
may often form thickets; eften 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, cammonly diececious, or rarely monoecious trees or shrubs; fruit 
a berrylike cone maturing in 1 te 83 seasons. Some forms are of vaive commer 
