NATIVE WOODY PLANTS OF THE UNITED STATES 145 
Ingenhouzia triloba, see Thurberia triloba. 
Inodes texana, see Sabal texana. 
Ioxylon pomiferum, see Maclura pomifera. 
Isocoma acradenius, see Aplopappus acradenius. 
Isocoma scopulorum, see Aplopappus scopulorum. 
Isomeris arborea Nutt. Bladderpod. 
Range: 5, 10. 
Site: Dry, sun. 
Fruit: Capsule. 
A small shrub; flowers February—May ; usually occurs on alkaline soils ; some- 
times herbaceous. 
Itea virginica L. Sweetspire. 
Range: 25, 28, 29. 
Site: Well-drained, moist, sun, shade. 
Fruit: Capsule. 
A large shrub; flowers May—June; usually occurs along the Coast; propaga- 
tion is by seed sown under glass in spring. 
Jamesia americana Torr. and Gray. Cliffbush. 
J. americana californica Jeps., Hdwinia americana (Torr. and Gray) Heller, 
EH. californica Small. 
Range: 4, 10, 11, 12, 13, 14. 
Site: Dry, well-drained, moist, sun. 
Fruit: Capsule. 
A small shrub; flowers May—July; commonly occurs on stream banks; in 
cultivation. 
Janusia gracilis Gray. 
Range: 10, 11, 16, 17. 
Site: Dry, sun. 
Fruit: Samara. 
A vine. 
Jatropha cardiophylla (Torr.) Muell. 
Range: 10. 
Site: Dry, sun. 
Fruit: Capsule. 
A small shrub. 
Jatropha carthaginensis, see Manihot carthaginensis. 
Jatropha multifida L. 
Range: 17. 
Site: Dry, well-drained, sun. 
Fruit: Capsule. 
A large shrub to small tree. 
Jatropha spathulata (Orteg.) Muell. Sangre de drago. 
Mozinna spathulata Orteg. 
Range: 11. 
Site: Dry, Well-drained, sun. 
Fruit: Capsule. 
A small to large shrub; stems flexible and tough. 
Juglans spp. Walnuts. 
Most species are commonly attacked by fungi and insects but none is very 
seriously damaged. 
Stomach records (in addition to specific records): Four species of birds; 
Arizona gray squirrel, walnut rock squirrel. Observations: Two species of 
birds. 
Juglans californica Wats. California walnut. 
Range: 3, 5, 10. 
_ Site: Well-drained, moist, sun. 
Fruit: Nut. 
A large shrub; resistant to walnut yellows; 30 seeds per pound. 
Observations: California mule deer. 
