Shrub 1.5-3.5 m tall; stems terete, striate, purplish, glabrous below to tomen-tose on younger branches. Leaves opposite; blades ovate to lance-ovate, acute to attenuate at the apex, rounded to somewhat cuneate at the base, the margins nearly entire on smaller leaves or dentate, crenate-serrate to sharply serrate with callous-tipped teeth, 3-13 cm long, 1.4-8 cm wide, the upper surface rugose, dark green, usually scabrous or glabrate, prominently 3-veined, the lower surface resin-dotted, pale green, scattered hirsute, denser on the veins; petioles 0.4-1.5 cm long, grooved, hirsute. Inflorescences of heads in terminal and axillary umbellate clusters on narrow branches; peduncles 0.2-2.5 cm long, tomentose. Heads radiate, campanulate, 6-13 mm wide (including rays), 8-10 mm tall; involucral bracts multiseriate, the bracts of the outer 2 or 3 series herbaceous or less often only herbaceous tipped, the outermost bracts lanceolate, 2.5-7.3 mm long, 1.1-3 mm wide, abaxially scabrous, adaxially resin-dotted, scattered hirsute, the intermediate bracts grading to broadly ovate, apically acute, the margins ciliate and often reddish-purple, scarious, the inner series narrower and longer, lance-ovate to oblong, the innermost bracts often bright yellow, 4.5-6.5 mm long, 1.7-2.2 mm wide; receptacle short conic, 1.2 mm tall, 1 mm wide, knobby; paleas scarious, lanceolate, with or without 2 short lateral lobes, folded and enclosing the disc achenes, 5-6.3 mm long, 1.5-2.5 mm wide; ray florets 4-7, pistillate, fertile, the ligules creamy-white to yellow, oblong, shallowly to deeply 2-3(-4)-lobed, gland dotted, 2.7-6 mm long, 1-3.2 mm wide, the tube 2-3 mm long, flared at the base, glabrous, the style branches bifid, revolute, acute; disc florets numerous, fertile, the corolla yellow, glabrous, the limb campanulate, the lobes 4-5, 1-1.6 mm long, the tube 1.7-2.5 mm long, flaring at the base, anthers exserted, yellow, the appendages narrowly ovate, sagittate at the base, the style branches recurved with obtuse tips. Ray achenes 1.2-2.3 mm long, 0.3-0.7 mm diam., narrowly turbinate, subterete to angular, black, sparsely antrorsely hirsute, with brownish hairs, carpopodium present, pappus setose, of 10-20 bristles 2.3-3.7 mm long; disc achenes like those of the ray florets but longer and more densely hirsute, 2-2.7 mm long, 0.5-0.8 mm diam., annulus 0.2-0.3 mm tall, pappus like that of the ray achene but longer, 2.5-4.3 mm long, occasionally purple at the base. Chro-mosome number n = 19, ca. 19
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