Perennials, 100-200 cm (bases woody). Stems branched, stipitate-glandular. Leaves alternate; petioles 20-35 mm; blades 3-nerved from bases, deltate-ovate or rhombic-ovate, 20-140 × 10-100 mm, bases truncate to cordate, margins irregularly dentate, apices acute, faces gland-dotted or glandular-pubescent. Heads in paniculiform arrays. Peduncles 3-18 mm, stipitate-glandular. Involucres cylindric to campanulate, 7.5-8.5 mm. Phyllaries 22-26 in 5-6 series, greenish, often purple-tinged, 3-4-striate, unequal, margins narrowly scarious (apices obtuse to acute); outer ovate to lanceolate (glandular-hirtellous, shorter than inner), inner linear-lanceolate (glabrous). Florets 15-24; corollas pale yellow-green or greenish white, 5-6.5 mm. Cypselae 2-3 mm, strigose; pappi of 30-35 white, barbellulate bristles. 2n = 18. Flowering Aug-Oct. Near streams, canyon bottoms; 1100-1800 m; Ariz., N.Mex.; Mexico.

Plant: Perennial forb to 1.5 m; herbage glandular sticky, fragrant Leaves: leaves alternate, triangular, toothed, petiolate, 3-8 cm long