Asclepias uncialis, commonly known as wheel milkweed, is a small, herbaceous perennial native to the western United States. This species is a member of the Apocynaceae family, which also includes dogbanes and periwinkles. Wheel milkweed is notable for its compact growth habit and its role in supporting native insect populations, particularly pollinators. Physically, Asclepias uncialis is characterized by its low-growing stature, typically reaching heights of only 10 to 20 centimeters. The plant forms a basal rosette of leaves from which erect stems arise. The leaves are generally ovate to broadly elliptic, with smooth margins and a somewhat leathery texture. They are arranged oppositely along the stems, which are often reddish-brown and somewhat hairy. The flowers of wheel milkweed are borne in small, terminal clusters. Each individual flower is relatively small, with five reflexed petals and a prominent corona. The corolla lobes are typically a pale pink to purplish-pink, while the corona segments are a darker shade. The flowering period usually occurs in late spring to early summer. Following successful pollination, the plant produces slender, erect follicles that contain numerous seeds. These seeds are attached to silky white or tan floss, which aids in wind dispersal. The native range of Asclepias uncialis is primarily in the arid and semi-arid regions of the western United States, including states such as Colorado, Utah, Arizona, and New Mexico. It thrives in open, well-drained habitats, often found in sandy or gravelly soils, grasslands, sagebrush steppes, and open woodlands. It prefers full sun exposure and is well-adapted to dry conditions. Cultivation of wheel milkweed requires similar conditions: excellent drainage, full sun, and minimal supplemental watering once established. It is a resilient plant in its native environment, tolerating heat and drought. Asclepias uncialis plays an important ecological role as a host plant for the larvae of monarch butterflies and other milkweed-dependent insects. Like other milkweeds, it contains cardiac glycosides, which can make the insects toxic to predators, providing a defense mechanism. While not cultivated for ornamental purposes on a large scale, its unique form and delicate flowers can be appreciated in native plant gardens or xeriscapes where its specific habitat requirements can be met. Its economic, medicinal, or culinary uses are not well-established or documented. An interesting characteristic of Asclepias uncialis is its adaptation to arid environments, where its compact size and ability to store water in its root system help it survive. The specific morphology of its flowers, with the fused corona, is a key feature for attracting and facilitating pollination by specific insects, often bees and butterflies. The milky sap, characteristic of the genus Asclepias, is a defense mechanism against herbivores.