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Home  /  Plants  /  Budburst Species  /  Asclepias asperula
Phenology Observation Sheet for Wildflowers and Herbs

COMMON NAME

Antelope-horns milkweed

SCIENTIFIC NAME

Asclepias asperula

ALSO KNOWN AS

Spider Milkweed

Plant family

Dogbane (Apocynaceae)

Plant group

Wildflowers and Herbs

A milkweed growing 2-3 feet with one to many hairy stems arising from a central crown. Stems of larger plants often lie on the ground.
4 reports
4+
OBSERVERS
4+
OBSERVATIONS
!

Identification hints

Leaf margins curl upwards making the leaves appear boat-shaped, or like a "V"
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Did you know?

This species is host not only to the monarch caterpillar, but also the dogbane tiger moth, the queen butterfly, and the unexpected cycnia.
DISTRIBUTION IN TH U.S.
Arizona , California , Colorado , Idaho , Kansas , Nebraska , New Mexico , Nevada , Oklahoma , Texas , Utah
HABITAT
This milkweed prefers the rocky or sandy soils of prairies, hillsides, and woodlands.
ATTRIBUTES
Leaves
Leaves can be whorled or alternate. Leaves are narrow and lance-shaped, 4-8 inches long by 1-3 inches wide.
Flowers
Tennis ball size clusters of white flowers, growing one per stem. Individual flowers have five pale green petals that curve upwards. Inside there are five white hoods tinged with a deep purple or maroon at the base.
Fruits
This plant's common name comes from the appearance of its seed pod, which curves as it grows and is said to resemble antelope horns.
Bloom Time
Blooming from April to August

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