Sonchus floridanus Linnaeus, Species Plantarum 2: 794. 1753.

"Habitat in Virginia, Canada." RCN: 5812.

Lectotype (designated here by Reveal): Herb. Linn. No. 949.13 (LINN) .

Current name: Lactuca floridana (L.) Gaertn. var. floridana ( Asteraceae).