Difference between revisions of "Ephedra nevadensis"
Proc. Amer. Acad. Arts 14: 298. 1879.
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|name=Ephedra antisyphilitica | |name=Ephedra antisyphilitica | ||
|authority=S. Watson | |authority=S. Watson | ||
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|publication_title= | |publication_title= | ||
|publication_place=1871, | |publication_place=1871, | ||
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|name=Ephedra antisyphilitica var. pedunculata | |name=Ephedra antisyphilitica var. pedunculata | ||
|authority=S. Watson | |authority=S. Watson | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Ephedra nevadensis var. paucibracteata | |name=Ephedra nevadensis var. paucibracteata | ||
|authority=Stapf | |authority=Stapf | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Ephedraceae;Ephedra;Ephedra nevadensis | |hierarchy=Ephedraceae;Ephedra;Ephedra nevadensis | ||
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name=Ephedra nevadensis | name=Ephedra nevadensis | ||
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|authority=S. Watson | |authority=S. Watson | ||
|rank=species | |rank=species | ||
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|publication year=1879 | |publication year=1879 | ||
|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/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V2/V2_338.xml |
|genus=Ephedra | |genus=Ephedra | ||
|species=Ephedra nevadensis | |species=Ephedra nevadensis | ||
Revision as of 19:47, 16 December 2019
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.