Skip to main content

Juniperus monosperma - oneseed juniper

Scientific Family
Cupressaceae
Synonyms
Juniperus occidentalis var. gymnocarpa, Sabina monosperma
Other common names
one-seed juniper
Plant type
Trees
Riparian
No

Plant Description

Origin
Native
Similar species
Juniperus pinchotii, Juniperus erythrocarpa

Nearly always multi-trunked and more shrub-like than other junipers with open round crown and limbs well-hidden by lower branches. Crown rounded.

Multi-stemmed shrub or tree; male and female cones on separate plants. Bark fibrous, exfoliating in strips. Branchlets erect. Leaves scale-like, <1/8 inch, undersides have conspicuous glands. Seed cones reddish-blue to brownish-blue, juicy.

Height
25 feet
Width
8 feet

Habitat

Habitat description

Found on dry hills, plains, and plateaus, often mixed with ponderosa and pinyon pines and other juniper species. More common north of Prescott, Arizona.

Plant Community
Montane Conifer Forest
Pinyon Juniper Woodlands
Low elevation
3000
High elevation
7000

Leaves

Leaf color
Green to dark green
Leaf type
Scales
Leaf shape
Other
Leaf margin
Other
Leaf attachment
Opposite
Leaf hairs
None
Spines
No
Leaf Drop
Evergreen

Scale-like leaves and whip leaves; scale-like leaves small, compact, keeled, taper to a point, to 1/16 inch long, tight and crowded on the twig in opposite pairs resulting in a slightly square twig, with elongate glands, most without white secretions.

Flowers

Flower shape
Other
Tubular
No

Gymnosperm, no flowers; pollen shedding February to April.

Flower clusters
None

Fruit

Fruit color
Reddish-blue to brownish-blue
Fruit type
Cone or cone-like

Pea-size berry-like round cones to 1/4 inch in diameter, usually maturing in 1 year. Reddish-blue at maturity and covered with a bluish waxy substance. 1 to 2 seeds per cone. Stays soft and juicy at maturity.

Bark/Branches

Bark color
Gray to brown
Bark texture
Shreddy or peeling

Scaly with very irregular furrows and exfoliating ridges. Peeling, shreddy and fibrous. Trunk to 1 foot in diameter. Reddish-brown twigs moderately stout and somewhat angular.