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.
Revision as of 00:29, 30 July 2020 by imported>Volume Importer
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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."/3-7/8" 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 +
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 +