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The vegetation of the Mojave and Colorado deserts:
Pinyon-Juniper Woodland

An open woodland composed of pinyon pines and junipers
occurs above 4,500 feet elevation where they can receive
over 10 inches of precipitation annually, some of it falling
as snow. These evergreen conifers were much more
widespread throughout southeastern California in the past
but have retreated to their mountain refuges as the climate
dried and warmed. This woodland is also a common vegetation
type in the mountains of the Great Basin. Shrubs
found in the understory include many from the Great
Basin such as sagebrush (Artemisia tridentata), bitterbrush
(Purshia tridentata), mountain mahogany (Cercocarpus
sp.), and Mormon tea (Ephedra viridis).
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Pinyon-Juniper Woodland
At higher elevations, particularly on north-facing slopes pinyon and juniper trees cling to shallow, rocky soil. . .
Structure-- Pinyon-juniper (PJN) Habitat
typically is an open woodland of low, round crowned, bushy trees (Lanner 1975) that are needle-leaved, evergreen, and . . .
Pinyon-Juniper Plant Use
The importance of resources available in the pinyon-juniper woodland to native peoples . . .
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