As classified in WFO snapshot
June 2025
latest classification for this taxon
variety
Echinocactus sessiliflorus var. tetracanthus
(Lem.) Monv. ex Lem.
This variety name was first published in Cact. Gen. Sp. Nov.: 88. 1839.
This variety name has been reclassified since this snapshot. Its current preferred usage is a synonym .