Asclepias asperula is a species of milkweed native to southwestern United States and northern Mexico. It is also known as antelope horns, green-flowered milkweed, and spider antelope horns. It is a perennial plant growing to 0.6-2 m (1 -2 feet) tall, with clustered greenish-yellow flowers with maroon highlights. It blooms from April through June, and favors moist, sandy or rocky soil.

Milkweeds are the primary food for Monarch caterpillars.

External links

• Native Plant Information Network

Gentianales