Hall’s Mule-ears

Agnorhiza elata, commonly known as Hall’s Mule-ears, is a perennial herbaceous plant native to the southwestern United States, particularly found in regions of Arizona and New Mexico. This species typically inhabits open, dry areas such as grasslands and rocky slopes, thriving in well-drained soils. Hall’s Mule-ears can reach a height of 30 to 90 centimeters (about 12 to 36 inches) and exhibits a clumping growth habit, with its stems emerging from a basal rosette of leaves. The plant is characterized by its erect, unbranched stems that support the inflorescence.

The leaves of Agnorhiza elata are distinctive, being large and broad, with a lanceolate to ovate shape, often measuring up to 30 centimeters (approximately 12 inches) in length. The upper surface of the leaves is typically glabrous, while the undersides may have a slightly hairy texture. The flowering period occurs in late spring to early summer, during which the plant produces bright yellow, daisy-like flowers that are arranged in a loose cluster at the top of the stem. Each flower head consists of numerous ray florets surrounding a central disk, attracting various pollinators, including bees and butterflies. The fruit of Hall’s Mule-ears is a small achene, which aids in seed dispersal by wind.

Ecologically, Agnorhiza elata plays a role in supporting local pollinator populations and contributes to the overall biodiversity of its native habitat. The plant is adapted to withstand periods of drought, exhibiting xerophytic characteristics that allow it to conserve water. Additionally, its robust root system helps stabilize soil, preventing erosion in its native range. While not widely cultivated, Hall’s Mule-ears can be appreciated in native plant gardens and is of interest for its role in local ecosystems.