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.
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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.

"/2-7/8" is not declared as a valid unit of measurement for this property.

... 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 +
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 +
light-brown +  and brown +
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 +