Ephedra antisyphilitica

Berlandier ex C. A. Meyer

Sér. 6, Sci. Math., Seconde Pt. Sci. Nat. 5(2): 29. 1846.

Common names: Clap-weed popote tepopote
Synonyms: Ephedra antisyphilitica var. brachycarpa Cory Ephedra occidentalis E. L. Reed Ephedra texana
Treatment appears in FNA Volume 2.

Shrubs erect or spreading, 0.25–1 m. Bark gray, slightly cracked and irregularly fissured. Branches alternate or whorled, rigid, angle of divergence about 45°. Twigs green, becoming yellow-green with age, glaucous, not viscid, with numerous longitudinal grooves; internodes 2–5 cm. Terminal buds conic, 1–3 mm, apex obtuse. Leaves opposite, 1–3 mm, connate to 2/3–7/8 their length; bases thickened, brown, completely deciduous; apex obtuse. Pollen cones 1–2 at node, lance-ellipsoid, 5–8 mm, sessile to nearly sessile; bracts opposite, 5–8 pairs, pale green to red, obovate, 2–4 × 2–3 mm, membranous, connate at base; bracteoles slightly exceeding bracts; sporangiophores 4–5 mm, 1/2 exserted, with 4–6 sessile to very short-stalked (less than 1 mm) microsporangia. Seed-cones 1–2 at node, ellipsoid, 6–12 mm, sessile to nearly sessile; bracts opposite, 4–6 pairs, ovate, 5–7 × 5–10 mm, connate to 1/8–7/8 their length, inner pairs becoming fleshy and red. Seeds 1 (–2), ellipsoid, 6–9 × 2–4 mm, light-brown to chestnut, smooth.


Phenology: Coning March–April.
Habitat: Arid soils and rocky slopes
Elevation: 100–1200 m

Distribution

V2 551-distribution-map.gif

Okla., Tex., Mexico in Nuevo León and San Luis Potosí

Discussion

Mexican populations of Ephedra antisyphilitica are disjunct from those in Texas.

Selected References

None.

Lower Taxa

None.

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

... more about "Ephedra antisyphilitica"
Dennis Wm. Stevenson +
Berlandier ex C. A. Meyer +
fissured +
deciduous +
red +  and pale green +
ovate +  and obovate +
fleshy +  and membranous +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
whorled +  and alternate +
yellowish green;olive-green +
Clap-weed +, popote +  and tepopote +
sessile +  and nearly sessile +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
on short to long peduncle +, sessile +  and compound +
subtending +
Okla. +, Tex. +  and Mexico in Nuevo León and San Luis Potosí +
100–1200 m +
Arid soils and rocky slopes +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
ephemeral +
connate +
0;2/3-7/8 +
photosynthetic +
scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
short-stalked +  and sessile to very +
single-integumented +
Coning March–April. +
sessile +  and nearly sessile +
lance-ellipsoid +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
whorled +, opposite +  and overlapping +
fleshy +, papery +  and membranous +
ellipsoid;ovoid obovoid or nearly globose +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
smooth to scabrous +
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 antisyphilitica var. brachycarpa +, Ephedra occidentalis +  and Ephedra texana +
Ephedra antisyphilitica +
species +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not viscid +
yellow-green +  and green +
spreading +  and erect +