Asclepias macrotis Torr.  
Family: Apocynaceae
longhood milkweed,  more...
Asclepias macrotis image
Patrick Alexander  
Plant: suffrutescent perennial; 15-35 cm tall; stems numerous, ascending, slender, copiously branched, finely short pubescent in lines above the leaves; milky sap Leaves: opposite, sessile, the blades narrowly linear, 2-9 cm long, 0.5-1.5 mm broad, glabrous, the margins revolute INFLORESCENCE: UMBELS lateral at 1 to few of the upper nodes, ca. 2 cm broad, the peduncles 0.1-0.7 cm long Flowers: small; calyx lobes ca. 2 mm long; corolla green to purple-tipped outside, greenish inside, the lobes 4-5 mm long; hoods purple below, yellowish white on the sides, undulate and ciliate along the upper margin, broadly rounded at the base, erect-ascending and oblong in the lower portion, recurved-spreading near the middle to an attenuate apex, 4-5 mm long along the dorsal surface, the margins ca. 2 mm high and about as long as the gynostegium, the horns radially flat, attached near the base of the hoods, erect, exserted ca. 1 mm; anther wings 1-1.1 mm long; corpusculum 0.3 mm long, the pollinia 0.6-0.7 mm long Fruit: FOLLICLES erect on deflexed pedicels, 4-8 cm long Misc: Grasslands and open woodlands, mts; 1400-2050 m (4600-6800 ft); Jun-Aug REFERENCES: Sundell, Eric. 1994. Asclepiadaceae. J. Ariz. - Nev. Acad. Sci. Volume 27, 169-187.
Sundell 1993, Woodson 1954, Kearney and Peebles 1969
Duration: Perennial Nativity: Native Lifeform: Subshrub General: Low, suffrutescent perennials, 15-35 cm tall; stems numerous, ascending, slender, copiously branched, finely short-pubescent in the lines above the leaves, very slender and twiggy. Leaves: Opposite and sessile; blades narrowly linear, 2-9 cm long, 1 mm broad, glabrous, the margins revolute. Flowers: Small, yellow-green and brown-purple, in 2 cm umbels, those lateral in upper nodes, on peduncles 0.5 cm long; corolla green to purple-tipped outside, greenish inside, lobes 4-5 mm long; hoods purple below, yellowish white on the sides, undulate and ciliate along the upper margin, broadly rounded at the base, erect-ascending and oblong in the lower portion, recurved-spreading near the middle to an attenuate apex, 4-5 mm long along the dorsal surface, margins 2 mm high; horns radially flat, attached near the base; calyx lobes about 2 mm long. Fruits: Follicles erect on deflexed pedicels, 4-8 cm long. Ecology: Found in grasslands and in open woodlands from 4,500-7,000 ft (1372-2134 m); flowers May-October. Distribution: w OK, w TX, s CO, NM, se AZ, south into Coahuila, n MEX. Notes: A decumbent to ascending habit, dense, bushy growth, and opposite, sessile, linear leaves with revolute margins help to distinguish this species from other milkweeds. Ethnobotany: Unknown, but other species in this genus have uses. Etymology: Asclepias is named for the Greek god of healing Asklepios, while macrotis comes from the Greek makros or large, and the Greek ous, for ear. Synonyms: None Editor: SBuckley 2010, 2014, FSCoburn 2015, AHazelton 2015
Asclepias macrotis image
Patrick Alexander  
Asclepias macrotis image
Patrick Alexander  
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image
Asclepias macrotis image