General: Singleleaf Pinyon Pine (Pinus monophylla) is a coniferous (cone-bearing) tree with round needles that radiate in all directions from the twigs. The cones are egg-shaped and 2- to 3-inches long. This species can be recognized by the single, round needle (other pines have bundles of needles).
In Nevada, Singleleaf Pinyon Pine is a common component of the montane vegetation in all mountain ranges the Upper Sonoran (Pinyon-Juniper Woodland) life zone. This is the only pinyon around Las Vegas. To the east in Zion and the Grand Canyon, the Two-needle Pinyon Pine (Pinus edulis) is the common pinyon.
Typical habitat in the Sheep Range.
Family: Pine (Pinaceae).
Other Names: Pinus californiarum.
Plant Form: Short, spreading tree with a rounded crown.
Height: To 35 feet.
Trunk: To 1.5 feet diameter.
Note the single, undivided needles.
Bark: Smooth when young, aging to dark brown, furrowed into scaly ridges.
Branches: Many long, twisting branches giving the tree a rounded appearance.
Needles: Bundles of 1; 1 to 2-inches long; light green to gray-green, slightly curved towards branch.
Cones: Erect; 1 to 5 inches; oval; green, aging to light brown or reddish-brown. Scales thick, blunt.
Young female cone.
Seeds: Two seeds per scale. Hard shell surrounds “pine nut.”