Gymnosperm Database
Link to jump to start of content Home Topics Bookstore Links Site Map Contact Us
search Google
the whole Web


Valid HTML 4.01 Transitional

Conservation status

Ephedra aspera

Engelmann ex Watson 1883

Common names

Boundary ephedra, pitamoreal (Stevenson 1993).

Taxonomic notes

Syn: Ephedra nevadensis Watson var. aspera (Engelmann ex Watson) Benson; E. peninsularis Johnston; E. reedii Cory (Stevenson 1993).


"Shrubs erect, 0.5-1.5 m. Bark gray, cracked and fissured. Branches opposite or whorled, rigid, angle of divergence about 30°. Twigs pale to dark green, becoming yellow with age, not viscid, slightly to strongly scabrous, with numerous longitudinal grooves; internodes 1-6 cm. Terminal buds conic, 1-2 mm, apex obtuse. Leaves opposite (rarely in whorls of 3), 1-3(-5) mm, connate to 1/2-7/8 their length; bases thickened, brown, shredding with age, ± persistent; apex obtuse. Pollen cones 2 (rarely 1 or whorled) at node, obovoid, 4-7 mm, sessile or rarely on short peduncles; bracts opposite, 6-10 pairs, yellow to red-brown, obovate, 3-4 × 2-3 mm, membranous; bracteoles slightly exceeding bracts; sporangiophores 4-5 mm, 1/2 exserted, with 4-6 sessile to short-stalked (less than 1 mm) microsporangia. Seed cones usually 2 at node, ovoid, 6-10 mm, sessile or on short, scaly peduncles; bracts opposite, 5-7 pairs, circular, 4-7 × 2-4 mm, membranous, with red-brown thickened center and base, margins entire. Seed 1, ellipsoid, 5-8 × 2-4 mm, light brown to brown, smooth to slightly scabrous. ... Coning March-April" (Stevenson 1993).

Distribution and Ecology

US: Arizona, California, New Mexico, Texas; Mexico (northern); 500-1800 m on dry rocky slopes, ravines, and fans (Stevenson 1993).

Big tree







See also

Last Modified 2012-11-23