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Asclepias asperula   (Decne. ) Woods.  subsp. capricornu  (Woods. ) Woods.
Mitchell County, Kansas
Height: 4-12 inches
Family: Apocynaceae - Dogbane Family
Flowering Period:   April, May, June
Also Called: Antelope horns.
Stems: Decumbent to ascending, few to many, 6 to 24 inches long, radiating from crown, simple to sparingly branched, glabrous or minutely pubescent.
Leaves: Mostly alternate, simple, short-stalked, firm, ascending to spreading, lanceolate, 1.5 to 8 inches long, .5 to 1.25 inch wide, nearly glabrous or sparsely pubescent; margins entire; tips pointed.
Inflorescences: Umbels, solitary, sessile or short-stalked, subtended by 1-3 leaves, 9-34-flowered, terminal.
Flowers: 5-parted, 1/4 to 1/2 inch tall, on stout stalks 3/5 to 1 inch long; calyx lobes lanceolate to ovate, green to purple-tinged, minutely hairy; corolla lobes elliptic-lanceolate, pale yellowish green, glabrous, curved upward; hoods club-shaped, purplish; tips incurved, usually greenish cream; horns absent.
Fruits: Pods, spindle-shaped, 1.5 to 5 inches long, 1/2 to 1 inch wide, minutely hairy, erect on downward-curved stalks; seeds egg-shaped, tufted with light tan hairs at tips.
Habitat: Dry rocky or sandy prairie uplands.
Distribution: Principally central 1/3 of Kansas.
Uses: The Navajo used this plant to treat bites from rabid animals.
Comments: The fruits resemble the horns of antelope as they elongate and begin to curve. Spider antelopehorn will ooze a milky fluid when injured. Formerly treated as Asclepiadaceae - Milkweed Family.
 Resembles Spider milkweed Asclepias viridis.

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