Ephedra pedunculata

Engelmann ex S. Watson

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

Common names: Clap-weed
Conservation concern
Treatment appears in FNA Volume 2.

Shrubs vinelike, trailing or clambering, 6–7 m. Bark gray, slightly cracked and fissured. Branches alternate (rarely whorled), lax, angle of divergence about 55°. Twigs gray-green, becoming green, then yellow-green with age, glaucous, with several moderately deep longitudinal grooves; internodes 1–8 cm. Terminal buds attenuate, 1–3 mm. Leaves opposite, 1–3 mm, connate to 2/3–7/8 their length; bases splitting at margins, persistent; apex obtuse. Pollen cones 1–2 at node, lanceoloid, 4–8 mm, sessile or on short to long, smooth peduncles; bracts opposite, 6–12 pairs, light yellow to reddish, obovate, 2–4 × 2–3 mm, membranous, free or slightly connate at base; bracteoles barely exceeding bracts; sporangiophores 3–5 mm, exserted to 1/2 their length, with 4–6 long-stalked (1–2 mm) microsporangia. Seed-cones 1–2 at node, ovoid, 6–10 mm, on short to long, smooth peduncles; bracts opposite, 3–6 pairs, 3–4 × 2–3 mm, ovate, connate to 1/8–7/8 their length, inner pairs becoming succulent and red when ripe. Seeds 2, ellipsoid, 4–10 × 2–4 mm, brown, smooth.


Phenology: Coning midwinter–early spring.
Habitat: Dry, sandy to rocky areas and slopes
Elevation: 100–1000 m

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.

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

... more about "Ephedra pedunculata"
Dennis Wm. Stevenson +
Engelmann ex S. Watson +
fissured +
persistent +
red +, light yellow +  and reddish +
connate +  and free +
ovate +  and obovate +
succulent +  and membranous +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
yellowish green;olive-green +
Clap-weed +
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 +
Tex. +  and n Mexico +
100–1000 m +
Dry, sandy to rocky areas and slopes +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 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 />) +
single-integumented +
on short to long +  and sessile +
lanceoloid +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Coning midwinter–early spring. +
ellipsoid +  and ovoid or obovoid +
whorled +, opposite +  and overlapping +
fleshy +, papery +  and membranous +
Proc. Amer. Acad. Arts +
ellipsoid;ovoid obovoid or nearly globose +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
smooth to scabrous +
ellipsoid +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Conservation concern +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Ephedra pedunculata +
species +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
yellow-green +, green +  and gray-green +
shrub +  and vinelike +
clambering +  and trailing +