Cyanthillium patulum (Dryand. ex Ait.) H. Rob.

Cyanthillium chinense (Lam.) Gleason, Bull. Torrey Club40:306. 1913.
Convza chinensis Lam. Encyc. 2: 83. 1786. Conyza patula Ait. Hort. Kew. 3: 184. 1789. Cenlratherum chinense Less. Linnaea 4: 320. 1829. Vernonia chinensis Less. Linnaea 6: 105, 674. 1831. Cacalia patula Kuntze, Rev. Gen. 324. 1891.
Stems erect, freely branched, 4-8 dm. high, glabrate or thinly pubescent; leaf-blades thin, spreading, broadly ovate, 6-10 cm. long, 3-7 cm. wide, acute, serrate, abruptly contracted at base into a petiole 2-3 cm. long, nearly glabrous above, thinly pubescent beneath; upper leaves smaller and narrower; heads peduncled in clusters of 2-5, or single at the end of long peduncles; involucre broadly campanulate to hemispheric, 6-7 mm. high; scales closely imbricate at base, erect or somewhat spreading at the apex, green with a scarious margin, 52