Pineneedle Milkweed (Asclepias linaria)
Alternative Names
Pine-needle Milkweed, Needle-leaf Milkweed, Threadleaf Milkweed, and Pineleaf Milkweed
Description of Pineneedle Milkweed (Asclepias linaria)
Pineneedle Milkweed (Asclepias linaria), a member of the Apocynaceae (Dogbane Family), is a herbaceous perennial to subshrub that grows from 2 to 5 feet tall and has white, pink, or green flowers that bloom throughout the growing season, roughly March to October. The leaves are simple, opposite, entire, needle-like in shape, and 1.25 to 3 inches in length and 0.02 to 0.16 inches in width. This plant grows in zones 9-11 and likes open areas with full sun to partial shade that have well-drained soil. More information about Pineneedle Milkweed can be found on this blog post.
Hosted Species
Monarch Butterfly (Danaus plexippus)

Queen Butterfly (Danaus gilippus)

Range of Pineneedle Milkweed (Asclepias linaria) in the United States and Canada
Habitat
Pineneedle Milkweed grows on rocky slopes between the elevations of 1,500 ft. and 6,000 ft. in the southwestern United States. This plant can live in conditions that have full sun to partial shade with well-drained soil.
Interesting Facts
The genus name, Asclepias, is the Greek name for the God of Medicine and the species name, linaria, is Latin for linear, referring to the leaves. This milkweed is endemic to the desert areas of the American Southwest.
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