Ephedra aspera

Engelmann ex S. Watson

Proc. Amer. Acad. Arts 18: 157. 1883.

Common names: Boundary ephedra pitamoreal
Synonyms: Ephedra nevadensis var. aspera (Engelmann ex S. Watson) L. D. Benson Ephedra peninsularis I. M. Johnston Ephedra reedii Cory
Treatment appears in FNA Volume 2.

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 redbrown, 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 redbrown thickened center and base, margins entire. Seed 1, ellipsoid, 5–8 × 2–4 mm, light-brown to brown, smooth to slightly scabrous.


Phenology: Coning March–April.
Habitat: Dry rocky slopes, ravines, and fans
Elevation: 500–1800 m

Distribution

V2 514-distribution-map.gif

Ariz., Calif., N.Mex., Tex., n Mexico

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Ephedra aspera"
Dennis Wm. Stevenson +
Engelmann ex S. Watson +
fissured +
persistent +
yellow +  and redbrown +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
obovate +
membranous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
whorled +  and opposite +
yellowish green;olive-green +
Boundary ephedra +  and pitamoreal +
on short , scaly peduncles +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
on short to long peduncle +, sessile +  and compound +
subtending +
Ariz. +, Calif. +, N.Mex. +, Tex. +  and n Mexico +
500–1800 m +
Dry rocky slopes, ravines, and fans +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
ephemeral +
connate +
0;1/2-7/8 +
photosynthetic +
scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
sessile +  and short-stalked +
single-integumented +
Coning March–April. +
rarely +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
whorled +, opposite +  and overlapping +
fleshy +, papery +  and membranous +
Proc. Amer. Acad. Arts +
ellipsoid;ovoid obovoid or nearly globose +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
scabrous +  and smooth to slightly +
ellipsoid +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Ephedra nevadensis var. aspera +, Ephedra peninsularis +  and Ephedra reedii +
Ephedra aspera +
species +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not viscid +
yellow +, pale +  and dark green +