Silphium connatum Linnaeus, Mantissa Plantarum Altera: 574. 1771.

"Habitat in America." RCN: 6648.

Neotype (Reveal in Jarvis & Turland in Taxon 47: 367. 1998): Herb. Linn. No. 1032.5 (LINN) .

Current name: Silphium perfoliatum L. var. connatum (L.) Cronquist ( Asteraceae).