Perennials or subshrubs, (20-)30-60(-80) cm (woody crowns and woody rhizomes). Stems erect (brittle), minutely puberulent. Leaves opposite; petioles 10-25 mm; blades triangular to lanceolate-ovate or ovate, 2-5(-7) × 1.5-3.5(-4.5) cm, bases truncate to shallowly cordate, margins dentate to serrate-dentate, abaxial faces sparsely hispidulous to glabrate, eglandular. Heads clustered. Peduncles 4-15 mm, puberulent. Involucres 4-5 mm. Phyllaries: apices acute, abaxial faces granular-puberulent. Corollas white, glabrous. Cypselae finely strigose-hispidulous. Flowering (Jul-)Aug-Oct. Pine, pine-oak, juniper, and pinyon-juniper woodlands, rocks along streams, slopes, ridges, washes; 1400-2700(-2900) m.
Cultural Significance: Navajo's used a cold infusion of this plant for headache and fever.
Santa Catalina Mountains
Location: Upper Green Mountain Trail saddle
8/20/15
