Mt. Davis Brickellbush

Perennials, 12–30 cm (caudices woody). Stems branched, pubescent. Leaves opposite; petioles 0–1 mm; blades 3-nerved from bases, deltate-ovate to lanceolate, 7–30 × 4–28 mm, bases mostly obtuse to sub-truncate, sometimes acuminate, margins serrate, apices acute, faces puberulent, gland-dotted. Heads borne singly or in corymbiform-paniculiform arrays. Peduncles 10–30 mm, puberulent. Involucres cylindric to campanulate, 8–12 mm. Phyllaries 12–15 in 3–5 series, greenish, often purple-tinged, 5–7-striate, unequal, margins scarious (apices acute); outer ovate to lance-ovate (puberulent, margins ciliate), inner narrowly lanceolate (glabrous). Florets 8–14; corollas pale green or yellow, 5.5–6.5 mm. Cypselae 4.5–5 mm, densely pubescent; pappi of 24–30 white, usually barbellate, sometimes subplumose, bristles. 2n = 18.

Brickellia parvula, the Mt. Davis brickellbush, is a North American species of flowering plants in the family Asteraceae. It is native to northeastern and north-central Mexico (Chihuahua) and the southwestern United States (southern New Mexico, southern Arizona, western Texas).

Brickellia parvula is a shrub up to 30 cm (12 inches) tall, growing from a woody caudex. It produces many small flower heads with yellow or green disc florets but no ray florets.