Difference between revisions of "Ephedra nevadensis"
Proc. Amer. Acad. Arts 14: 298. 1879.
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|common_names=Nevada ephedra | |common_names=Nevada ephedra | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Ephedra antisyphilitica | |name=Ephedra antisyphilitica | ||
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|publication title=Proc. Amer. Acad. Arts | |publication title=Proc. Amer. Acad. Arts | ||
|publication year=1879 | |publication year=1879 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_338.xml |
|genus=Ephedra | |genus=Ephedra | ||
|species=Ephedra nevadensis | |species=Ephedra nevadensis | ||
Latest revision as of 20:22, 5 November 2020
Shrubs erect, 0.25–1.5 m. Bark gray, fissured. Branches alternate or whorled, rigid, angle of divergence about 45°. Twigs pale green, becoming yellow with age, not viscid, glaucous, with numerous longitudinal grooves; internodes 1–6 cm. Terminal buds conic, 1–3 mm, apex obtuse. Leaves opposite (rarely in whorls of 3), 2–4(–8) mm, connate to 1/2–3/4 their length; bases thickened, brown, completely deciduous; apex obtuse. Pollen cones 1–several at node, ellipsoid, 4–8 mm, sessile or on short peduncles with 2 pairs of basal bracts; bracts opposite, 5–9 pairs, yellow to light brown, obovate, 3–4 × 2–3 mm, membranous; bracteoles slightly exceeding bracts; sporangiophores 3–5 mm, exserted to 1/4–1/2 their length, with 6–9 sessile to short-stalked (less than 1 mm) microsporangia. Seed cones 1–several at node, nearly globose, 5–11 mm, on long peduncles, with 1–2 pairs of basal bracts; bracts opposite, 3–5 pairs, nearly circular, 4–8 × 3–6 mm, herbaceous, with light brown to yellow-green center, occasionally pinkish tinged, margins entire. Seeds (1–)2, ellipsoid, 6–9 × 2–4 mm, brown, smooth. 2n = 14, 28.
Phenology: Coning late winter–midspring.
Habitat: Dry, rocky slopes and hills, rarely in sandy flat areas
Elevation: 700–1900 m
Distribution
Ariz., Calif., Nev., Oreg., Utah.
Discussion
Selected References
None.