Difference between revisions of "Ephedra antisyphilitica"
Sér. 6, Sci. Math., Seconde Pt. Sci. Nat. 5(2): 29. 1846.
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|name=Ephedra antisyphilitica var. brachycarpa | |name=Ephedra antisyphilitica var. brachycarpa | ||
|authority=Cory | |authority=Cory | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Ephedra occidentalis | |name=Ephedra occidentalis | ||
|authority=E. L. Reed | |authority=E. L. Reed | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Ephedra texana | |name=Ephedra texana | ||
| − | |authority= | + | |authority= |
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Ephedraceae;Ephedra;Ephedra antisyphilitica | |hierarchy=Ephedraceae;Ephedra;Ephedra antisyphilitica | ||
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name=Ephedra antisyphilitica | name=Ephedra antisyphilitica | ||
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|authority=Berlandier ex C. A. Meyer | |authority=Berlandier ex C. A. Meyer | ||
|rank=species | |rank=species | ||
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|publication year=1846 | |publication year=1846 | ||
|special status= | |special status= | ||
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|genus=Ephedra | |genus=Ephedra | ||
|species=Ephedra antisyphilitica | |species=Ephedra antisyphilitica | ||
Latest revision as of 21:24, 5 November 2020
Shrubs erect or spreading, 0.25–1 m. Bark gray, slightly cracked and irregularly fissured. Branches alternate or whorled, rigid, angle of divergence about 45°. Twigs green, becoming yellow-green with age, glaucous, not viscid, with numerous longitudinal grooves; internodes 2–5 cm. Terminal buds conic, 1–3 mm, apex obtuse. Leaves opposite, 1–3 mm, connate to 2/3–7/8 their length; bases thickened, brown, completely deciduous; apex obtuse. Pollen cones 1–2 at node, lance-ellipsoid, 5–8 mm, sessile to nearly sessile; bracts opposite, 5–8 pairs, pale green to red, obovate, 2–4 × 2–3 mm, membranous, connate at base; bracteoles slightly exceeding bracts; sporangiophores 4–5 mm, 1/2 exserted, with 4–6 sessile to very short-stalked (less than 1 mm) microsporangia. Seed cones 1–2 at node, ellipsoid, 6–12 mm, sessile to nearly sessile; bracts opposite, 4–6 pairs, ovate, 5–7 × 5–10 mm, connate to 1/8–7/8 their length, inner pairs becoming fleshy and red. Seeds 1(–2), ellipsoid, 6–9 × 2–4 mm, light brown to chestnut, smooth.
Phenology: Coning March–April.
Habitat: Arid soils and rocky slopes
Elevation: 100–1200 m
Distribution
Okla., Tex., Mexico in Nuevo León and San Luis Potosí.
Discussion
Mexican populations of Ephedra antisyphilitica are disjunct from those in Texas.
Selected References
None.