Wyethia is a genus of flowering plants in the family Asteraceae, native to western North America. The genus comprises roughly a dozen species of perennial herbs commonly known as mule's ears, a name that refers to their large, lance-shaped or elliptic leaves. Plants are typically low-growing with stout stems, producing showy golden-yellow (occasionally white) ray florets surrounding a central disc — an appearance that closely resembles a miniature sunflower.
The genus was first described by the American botanist Thomas Nuttall in 1834, based on specimens collected in the western United States. It is named in honour of Nathaniel Jarvis Wyeth (1802–1856), an American merchant and explorer who led two overland expeditions to the Pacific Northwest in the 1830s and whose botanical collections aided early documentation of the region's flora.
Species in the genus occupy open, sunny habitats across the western United States, including grasslands, montane meadows, open woodland slopes, and sagebrush steppe, often at elevations ranging from foothills to subalpine zones. Several species, including Wyethia amplexicaulis and Wyethia mollis, are characteristic components of intermountain sagebrush communities. The genus was formerly broader, with certain members now placed in the segregate genera Agnorhiza, Scabrethia, and Vigethia.
Etymology
The genus name Wyethia honours Nathaniel Jarvis Wyeth (1802–1856), an American merchant and explorer known for leading the first private overland expeditions to the Oregon Territory. The common name "mule's ears" refers to the characteristically large, upright leaves of many species.
Distribution
Wyethia is endemic to western North America, with species distributed across the intermountain west and Pacific slope of the United States. Habitats include sagebrush steppe, montane meadows, grasslands, and open slopes, primarily from California and Oregon east to Wyoming and Utah.
Ecology
Mule's ears are conspicuous components of open western habitats. They are deep-rooted perennials that tolerate dry, rocky, or clay soils and are adapted to seasonal drought. Their showy composite flower heads attract a range of native pollinators including bees and butterflies. Several species are early-season bloomers, providing nectar when few other forbs are in flower.
Cultural Uses
Several Wyethia species were used by Indigenous peoples of the Great Basin and Pacific slope. Roots of some species were consumed as food (roasted or raw) and used medicinally by tribes including the Paiute, Shoshone, and Ohlone. Seeds were also collected and ground as a food source.
