Liabum bourgeaui Hieron.

Coarse herb or weakly woody subshrub, 1-2 m tall, the upper internodes tightly felted-lanate, dull white to light brown, often streaked with brownish pilose hairs protruding from the lanate tomentum. Leaves opposite, pinnately veined with 2 prominent lateral veins arising from near the base, the upper leaf blades ovate to subdeltoid, acuminate above, obtuse to abruptly contracted below to a prominently winged petiole, the margin subentire to minutely denticulate, 10-20 cm long, 7-15 cm wide, ca. 11/2 times longer than wide, the upper surface glabrescent to obscurely arachnoid tomentose, the lower surface closely felted-lanate with occasional brownish hairs, usually near the prominent veins; petiole ca. 1/4 as long as the blade, the wing acuminate-tapering toward the stem. Inflores-cence a series of few-headed cymules compounded into an open, terminal, paniculate to corymbiform cyme, usually subtended by prominent and distinct lateral cymes arising in the axils of the upper leaves. Heads campanulate, radiate but inconspicuously so; involucral bracts numerous, conspicuously imbricate in several series, acicular to long-lanceolate, glabrous or sometimes arachnoid tomentose among the outermost bracts, the inner and longest bracts often weakly reddish-margined, ca. 8 mm long in mature heads; receptacle paleaceous with irregular subulate awns 2 mm long or less; ray florets in 1-2 series, fertile, the