Ephedra trifurca |
Ephedra coryi |
|
---|---|---|
long leafed Ephedra, longleaf Ephedra, longleaf jointfir, Mexican-tea |
Cory's Ephedra, Cory's jointfir |
|
Habit | Shrubs erect, 0.5–5 m. Bark gray, cracked and irregularly fissured. | Shrubs rhizomatous, forming clumps, erect, 0.25–1.5 m, 3–5 m diam. |
Bark | red-brown, cracked and irregularly fissured. |
|
Branches | alternate or whorled, rigid, angle of divergence about 30°. |
alternate or whorled, becoming rigid, angle of divergence about 25°. |
Twigs | pale green, becoming yellow, then gray with age, glaucous, with numerous very fine longitudinal grooves; internodes 3–10 cm. |
bright green, becoming yellow-green with age, not viscid, ridges between longitudinal grooves papillate, slightly scabrous; internodes 2–5 cm. |
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. |
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, 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. |
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, 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. |
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 spinelike, to 10 mm. |
buds conic, 1–3 mm. |
Ephedra trifurca |
Ephedra coryi |
|
Phenology | Coning late winter–early spring. | Coning March–April. |
Habitat | Dry rocky slopes to flat sandy areas | Sandy, semiarid areas |
Elevation | 500–2000 m (1600–6600 ft) | 500–2300 m (1600–7500 ft) |
Distribution |
AZ; CA; NM; TX; Mexico in Baja California; Chihuahua; Coahuila; Sonora
|
NM; TX |
Discussion | The hybrid Ephedra × intermixta is discussed under E. torreyana. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Ephedraceae > Ephedra | Ephedraceae > Ephedra |
Sibling taxa | ||
Name authority | Torrey ex S. Watson: Botany (Fortieth Parallel): 329. (1871) | E. L. Reed: Bull. Torrey Bot. Club 63: 351. (1936) |
Web links |