Difference between revisions of "Ephedra trifurca"
Botany (Fortieth Parallel): 329. 1871.
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|elevation=500–2000 m | |elevation=500–2000 m | ||
|distribution=Ariz.;Calif.;N.Mex.;Tex.;Mexico in Baja California;Chihuahua;Coahuila;Sonora. | |distribution=Ariz.;Calif.;N.Mex.;Tex.;Mexico in Baja California;Chihuahua;Coahuila;Sonora. | ||
| − | |discussion=<p>The hybrid Ephedra × intermixta is discussed under E. torreyana.</p> | + | |discussion=<p>The hybrid <i>Ephedra</i> × intermixta is discussed under <i>E. torreyana</i>.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1871 | |publication year=1871 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V2/V2_18.xml |
|genus=Ephedra | |genus=Ephedra | ||
|species=Ephedra trifurca | |species=Ephedra trifurca | ||
Revision as of 16:46, 18 September 2019
Shrubs erect, 0.5–5 m. Bark gray, cracked and irregularly fissured. Branches alternate or whorled, rigid, angle of divergence about 30°. Twigs pale green, becoming yellow, then gray with age, glaucous, with numerous very fine longitudinal grooves; internodes 3–10 cm. Terminal buds spinelike, to 10 mm. Leaves in whorls of 3, 5–15 mm, connate to 1/2–3/4 their length; bases becoming gray and shredded with age; apex spinose. Pollen cones 1–several at node, obovoid, 6–10 mm, on short, scaly peduncles; bracts in 8–12 whorls of 3, reddish brown, obovate, slightly clawed, 3–4 × 2–3 mm, membranous; bracteoles nearly equaling bracts; sporangiophores 4–5 mm, exserted to 1/4 their length, with 4–5 short-stalked microsporangia. Seed cones 1–several at node, obovoid, 10–15 mm, on short, scaly peduncles (rarely sessile); bracts in 6–9 whorls of 3, circular, 8–12 × 8–12 mm, papery, translucent with reddish brown center and base, base clawed, margins entire. Seeds 1(–3), ellipsoid, 8–15 × 1.5–3 mm, light brown, smooth.
Phenology: Coning late winter–early spring.
Habitat: Dry rocky slopes to flat sandy areas
Elevation: 500–2000 m
Distribution
Ariz., Calif., N.Mex., Tex., Mexico in Baja California, Chihuahua, Coahuila, Sonora.
Discussion
The hybrid Ephedra × intermixta is discussed under E. torreyana.
Selected References
None.