Ambrosia trifida Linnaeus, Species Plantarum 2: 987. 1753.

"Habitat in Virginia, Canada." RCN: 7157.

Lectotype (Reveal in Jarvis & Turland in Taxon 47: 351. 1998): Herb. Linn. No. 1114.1 (LINN) .

Current name: Ambrosia trifida L. ( Asteraceae).