Flaveria angustifolia (Cav.) Pers.

Flaveria angustifolia (Cav.) Pers. Syn. PI. 2: 489. 1807
Millcria angustifolia Cav. Ic. 3: 12. 1794.
Flaveria iniegrifolia Moc. & Sesse; DC. Prodr. 5: 635, as synonym. 1836. Flaveria radicans Moc. & Sesse; DC. Prodr. 5: 635, as synonym. 1836. Flaveria elata Klatt, Leopoldina 23: 146. 1887.
A dichotomously branched herb; stem 3-10 dm. high, glabrous below, puberulent on the upper part; leaves linear to linear-lanceolate, 3-1 1 cm. long, 2-4 cm. wide, entire or minutely denticulate, glabrous; inflorescence umbellate-corymbiform, nearly naked; heads densely glomerate, 4-9-flowered; involucral bracts usually 3, rarely more, 4 mm. long, the calyculate ones conspicuous, unequal; ray-flower 1 or sometimes wanting; ligule 2 mm. long, 1 mm. wide; disk-flowers 3-5, sometimes 6-8; corollas about 3 mm. long; tube slightly villous, about as long as the funnelform throat ; aehenes nearly 2 mm. long.
Type locality: "Nova Hispania" [Mexico]. Distribution: Oaxaca and Puebla.