homotypic synonyms:
Echinocereus ctenoides (Engelm.) Rümpler;
heterotypic synonyms:
Echinocactus ctenoides Lemaire;
protologue: Proc. Amer. Acad. Arts 3: 279 (1856)
2 225801 Cereus ctenoides Engelm.
Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 42 () [P. Roetter]
Echinocereus ctenoides (Engelm.) Rümpler;
heterotypic synonyms:
Echinocactus ctenoides Lemaire;
protologue: Proc. Amer. Acad. Arts 3: 279 (1856)
2 225801 Cereus ctenoides Engelm.Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 42 () [P. Roetter]