Vernonia greggii A. Gray

Vernonia greggii A. Gray, Proc. Am. Acad. 17: 204. 1882
Vernonia Greggii Palmeri A. Gray, Proc. Am. Acad. 17: 204. 1882.
Stems erect, simple to the inflorescence, puberulent or glabrate; leaf-blades firm, oblonglanceolate to narrowly elliptic, 8-10 cm. long, 1.5-2.5 cm. wide, broadest at the middle and tapering regularly to each end, acute, serrulate, scabrously puberulent above, glabrous and black-dotted on the surface and puberulent on the veins beneath, sessile or short-petioled, the upper leaves gradually reduced ; inflorescence very loose and open, with few many-flowered heads on stout, subulately bracted peduncles 1-5 cm. long; involucre hemispheric to broadly campanulate, 8-10 mm. high; scales closely imbricate, appressed, glabrous, pulverulent, or slightly arachnoid-tomentose, the outer triangular-ovate, sharply acute, the inner elongate, a cuminate; achenes 4-5 mm. long, essentially glabrous, sparsely resinous in the furrows; pappus tawny, the bristles 7 mm. long, the scales linear, 1-2 mm. long.
Type locality: Northern Mexico. Distribution: Coahuila.