Juniperus deppeana
Juniperus deppeana is a small to medium-sized tree reaching in height. It is native to central and northern Mexico and the southwestern United States.
Description
The tree reaches, rarely, in height. The bark is usually very distinctive, unlike other junipers, hard, dark gray-brown, cracked into small square plates superficially resembling alligator skin; it is however sometimes like other junipers, with stringy vertical fissuring. The shoots are in diameter. On juvenile specimens, the leaves are needle-like and long. The leaves are arranged in opposite decussate pairs or whorls of three; in adulthood they are scale-like, long and 1–1.5 mm broad. The cones are berrylike, wide, green when young and maturing to orange-brown with a whitish waxy bloom,. These contain 2–6 seeds, which mature in about 18 months. The male cones are long, and shed their pollen in spring. The species is largely dioecious, producing cones of only one sex on each tree, but occasional trees are monoecious.Taxonomy
There are five varieties, not accepted as distinct by all authorities:- Juniperus deppeana var. deppeana. Throughout the range of the species. Foliage dull gray-green with a transparent or yellowish resin spot on each leaf; cones diameter.
- Juniperus deppeana var. pachyphlaea. Arizona, New Mexico, northernmost Mexico. Foliage strongly glaucous with a white resin spot on each leaf; cones 7–12 mm diameter.
- Juniperus deppeana var. robusta. Northwestern Mexico. Cones larger, diameter.
- Juniperus deppeana var. sperryi. Western Texas, very rare. Bark furrowed, not square-cracked, branchlets pendulous; possibly a hybrid with J. flaccida.
- Juniperus deppeana var. zacatecensis. Zacatecas. Cones large, 10–15 mm diameter.