Eupatorium houstonis Linnaeus, Systema Naturae, ed. 10, 2: 1204. 1759, orth. var.

RCN: 6054.

Lectotype (King & Robinson in Woodson & Schery in Ann. Missouri Bot. Gard. 62: 973. 1975): Herb. Clifford: 396, Eupatorium 6 (BM-000646954; iso- MW) .

Current name: Mikania houstoniana (L.) B.L. Rob. ( Asteraceae).

Note: Evidently an orthographic variant of E. houstonianum L. (1753), having the same Linnaean phrase name, and the same species number (i.e. “3”). Eupatorium houstonianum is absent from Syst. Nat., ed. 10.