Eriophyllum

Eriophyllum is a genus of flowering plants in the family Asteraceae, native to western North America. Commonly known as woolly sunflowers, species in this genus are annuals or short-lived perennials adapted to dry, sunny habitats ranging from coastal scrub to desert foothills. They are noted for woolly, gray-green leaves and stems and for their yellow, daisy-like flower heads, which typically have bright ray florets encircling a central cluster of disc florets.

Plants bloom in spring to early summer, with some species flowering later after warm rains. The size and habit vary by species, from low groundcovers to upright shrubs. The woolly hairs on leaves and stems help reduce water loss and reflect excess sunlight, contributing to drought tolerance. Flowers are attractive to bees and other pollinators.

Taxonomy and species: Eriophyllum contains several dozen species. Notable members include Eriophyllum lanatum, commonly called woolly sunflower or Oregon sunshine, and Eriophyllum staechadifolium, the thread-leaf woolly sunflower. The genus is mainly distributed across western North America, from British Columbia to California and into Baja California and the southwestern United States.

Cultivation and uses: Eriophyllum species are popular in native plant gardens and xeriscaping due to their drought tolerance and bright yellow flowers. They prefer well-drained soils and full sun; overwatering or heavy, poorly drained soils can cause problems. They can be propagated by seed; some species readily reseed in favorable climates.