Data provided by the participants of the Consortium of California Herbaria

View additional distribution information on the Jepson eflora

Juniperus osteosperma (Utah Juniper; syn. J. utahensis) is a shrub or small tree reaching 3-6 meter (rarely to 9 meter) tall. It is native to the southwestern United States, in Utah, Nevada, Arizona, western New Mexico, western Colorado, Wyoming, southern Montana, southern Idaho and eastern California. It grows at moderate altitudes of 1,300-2,600 meter, on dry soils, often together with Pinus monophylla. The shoots are fairly thick compared to most junipers, 1.5-2 millimeter diameter. The leaves are arranged in opposite decussate pairs or whorls of three; the adult leaves are scale-like, 1-2 millimeter long (to 5 millimeter on lead shoots) and 1-1.5 millimeter broad. The juvenile leaves (on young seedlings only) are needle-like, 5-10 millimeter long. The cones are berry-like, 8-13 millimeter in diameter, blue-brown with a whitish waxy bloom, and contain a single seed (rarely two); they are mature in about 18 months. The male cones are 2-4 millimeter long, and shed their pollen in early spring. It is largely monoecious with both sexes on the same plant, but around 10% of plants are dioecious, producing cones of only one sex.

Plant type

Tree

Size

10 - 26 ft Tall

Form

Upright

Growth rate

Slow

Calscape icon
Color

Yellow

Flowering season

Spring

Sun

Full Sun, Partial Shade

Water

Low, Moderate

Soil description

Prefers sandy or loamy soils. Does not grow well in clay soils.

Propagation

For propagating by seed: 3 mos. warm (diurnal fluctuation from 68° to 86°F; and 3 mos. cold stratification (USDA Forest Service 1974).

Sunset Zones

1, 2*, 3*, 4, 5, 6, 7*, 8, 9, 10, 11, 12, 14*, 15, 16*, 18*, 19*, 20*, 21*, 22, 23, 24

Plant communities

Pinyon-Juniper Woodland

Caterpillars
Butterflies

Butterflies and moths supported

2 confirmed and 15 likely

Confirmed Likely

Olive Hairstreak

Callophrys gryneus

Sequoia Sphinx Moth

Sphinx sequoiae

Abagrotis mirabilis

The Brown Elfin

Callophrys augustinus