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Asclepias species [Apocynaceae]

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Scientific Name Asclepias asperula USDA PLANTS Symbol
ASAS
Common Name Antelope Horns ITIS Taxonomic Serial No.
30247
Family Apocynaceae (Dogbane) SEINet
Reference
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Description Habitat: Open grassy areas.
Plant: Low-growing perennial 8 to 24 inches tall; may recline on the ground.
Leaves: Narrow lanceolate to linear-lanceolate leaves 2-1/2 to 6 inches long, often folded.
Inflorescence: Numerous flowers crowded in terminal spherical clusters; each about 1/2-inch across with five upward-curving, pale yellow-greenish corolla lobes (petals); dark purple hoods attached to anther head (gynostegium); horns included in hoods.
Bloom Period: March to May.
References: "Wildflowers of Central Texas" by Marshall Enquist, SEINet, and Jepson eFlora.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Asclepias oenotheroides USDA PLANTS Symbol
ASOE
Common Name Zizotes Milkweed ITIS Taxonomic Serial No.
30290
Family Apocynaceae (Dogbane) SEINet
Reference
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Description Habitat: Rocky or clayey soils in fields and thickets.
Plant: Low-growing perennial, single stems or branched from base; stems 2 to 18 inches long.
Leaves: Opposite, ovate to oblong-lanceolate, 1.6 to 4.7 inches long and 0.4 to 2.4 inches wide; on petioles 0.4 to 0.8 inches long; wavy edges and pale green surface with minute hairs especially beneath.
Inflorescence: Several flowers in clusters aring in the middle and upper stem nodes, corolla lobes are creamy white to yellowish green or pale yellow and bending backward near the stem tips.
Bloom Period: Year-round.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of Texas" by Michael Eason and SEINet.
BONAP Distribution Map

Texas Status:
Native

© Tom Lebsack 2022