Ageratina croatii R.M.King & H.Rob.

Coarse herbs or subshrubs to 1 m high, with few branches; stems yellowish-brown, terete, somewhat densely puberulous above. Leaves opposite; blades papyraceous, ovate, mostly 5-8 cm long and 1.5-4.0 cm wide, the base short-cuneate to rounded, trinervate, the margins closely doubly serrate, the apex narrowly acuminate, the upper and lower surfaces with puberulence mostly on the veins, the secondary veins few, strongly ascending; petioles slender, 10-25 mm long. Inflorescence somewhat lax, broadly corymbose-paniculate, the ultimate branches 1.5-5.0 mm long, densely puberulous. Heads ca. 4 mm high with 10-15 florets; involucral bracts ca. 15, eximbricate, in 2 series, linear-lanceolate, 3.5-4.0 mm long and 0.4-0.5 mm wide, bicostate, the tips short-acute with a short fringe of marginal hairs, nonscarious, the lateral margins narrowly scarious, the outer surface sparsely puberulous; corolla white?, ca. 2.3 mm long, the tube narrow, ca.