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Asclepias cryptoceras is a species of milkweed known by the common names jewel milkweed, pallid milkweed, Humboldt Mountains milkweed, and cow-cabbage. It is native to the western United States, where it grows in many types of habitat, especially dry areas. This is a perennial herb growing low against the ground or drooping. It arises from a fleshy, woody rhizome-like root. The thick leaves are round to heart-shaped and arranged oppositely on the short stem. The inflorescence is a cluster of small flowers with centers of bright to dull pink hoods surrounded by pale-colored reflexed corollas. The fruit is a follicle held erect on a small stalk.
- Payson, Edwin (January 1916). "The Pollination of Asclepias cryptoceras". Botanical Gazette. The University of Chicago Press. 61 (1): 72–74. doi:10.1086/331718. JSTOR 2468759.
- Asclepias cryptoceras. Germplasm Resources Information Network (GRIN).
- Asclepias cryptoceras. Native American Ethnobotany. University of Michigan, Dearborn.
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