Ephedra nevadensis |
Ephedra coryi |
|
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Nevada Ephedra, Nevada jointfir, Nevada Mormon tea |
Cory's Ephedra, Cory's jointfir |
|
Habit | Shrubs erect, 0.25–1.5 m. | Shrubs rhizomatous, forming clumps, erect, 0.25–1.5 m, 3–5 m diam. |
Bark | gray, fissured. |
red-brown, cracked and irregularly fissured. |
Branches | alternate or whorled, rigid, angle of divergence about 45°. |
alternate or whorled, becoming rigid, angle of divergence about 25°. |
Twigs | pale green, becoming yellow with age, not viscid, glaucous, with numerous longitudinal grooves; internodes 1–6 cm. |
bright green, becoming yellow-green with age, not viscid, ridges between longitudinal grooves papillate, slightly scabrous; internodes 2–5 cm. |
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. |
opposite, 2–5 mm, connate to 1/2–3/4 their length; bases thickened, brown, persistent, becoming hard, enlarged, and black; apex acute. |
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. |
2–several at node, obovoid, 4–6 mm, on very short, scaly peduncles (rarely sessile); bracts opposite, 5–9 pairs, light yellow, ovate, 2–4 × 2–3 mm, membranous, slightly connate at base; bracteoles slightly exceeding bracts; sporangiophores 2–4 mm, 1/4 exserted, with 5–7 sessile to short-stalked (less than 1 mm) microsporangia. |
Seed(s) | 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. |
cones 2–several at node, obovoid to nearly globose, 7–15 mm, on smooth peduncles, 5–25 mm, with 1 pair of basal and 1 pair of nearly terminal bracts, at least in early cones; bracts opposite, 3–4 pairs, ovate to circular, 5–8 × 5–12 mm, inner pairs becoming fleshy (at least centrally) and orange at maturity. |
Terminal | buds conic, 1–3 mm, apex obtuse. |
buds conic, 1–3 mm. |
2n | = 14, 28. |
|
Ephedra nevadensis |
Ephedra coryi |
|
Phenology | Coning late winter–midspring. | Coning March–April. |
Habitat | Dry, rocky slopes and hills, rarely in sandy flat areas | Sandy, semiarid areas |
Elevation | 700–1900 m (2300–6200 ft) | 500–2300 m (1600–7500 ft) |
Distribution |
AZ; CA; NV; OR; UT
|
NM; TX |
Discussion | In New Mexico Ephedra coryi occurs only in an isolated population in the San Andreas Mountains and represents the shorter extreme (5–10 mm) in the range of peduncle length. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Ephedraceae > Ephedra | Ephedraceae > Ephedra |
Sibling taxa | ||
Synonyms | E. antisyphilitica, E. antisyphilitica var. pedunculata, E. nevadensis var. paucibracteata | |
Name authority | S. Watson: Proc. Amer. Acad. Arts 14: 298. (1879) | E. L. Reed: Bull. Torrey Bot. Club 63: 351. (1936) |
Web links |