Flaveria bidentis (L.) Kuntze

Flaveria bidentis (L.) Kuntze, Rev. Gen. 3: 148. 1898
Ethulia bidentis L. Mant. 110. 1767.
Eupatorium chilense Molina, Sagg. Chile 142. 1782.
Milleria chiloensis Juss. Gen. 187, as synonym. 1789.
Flaveria chilensis Juss.; J. F. Gmel. Syst. Nat. 2: 1269. 1791.
Milleria Contrayerba Cav. Ic. 1: 2. 1791.
Yermifuga corymbosa R. & P. Svst. Fl. Per. 216. 1798.
Flaveria Contrayerba Pers. Syn. PI. 2: 489. 1807.
Flaveria capitala Juss.; Smith, in Rees, Cycl. 14: Flaveria no. 1. 1810.
Flaveria bonariensis DC. Prodr. 5: 635. 1836.
A dichotomously branched herb; stem 3-10 dm. high, sometimes tinged with red, glabrous or sparingly villous on the obtuse angles and the nodes; leaves slightly connate, lanceolate-elliptic, 3-ribbed, serrate, 3-8 cm. long, glabrous; cymes 2-2.5 cm. broad, with scorpioid branches; heads 2-9-flowered ; involucral bracts 3 with 1 or 2 small calyculate ones, the principal ones 4 mm. long, oblanceolate, obtuse; ligule yellow, 1 mm. long, narrow, upright, acute; disk-corollas 1-8, 2-3 mm. long; achenes 2 mm. long, that of the ray-flower slightly larger.
Type locality: "India?"
Distribution: Alabama, Georgia, and Florida; Mexico; South America.