Echinocactus clavus
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Echinocactus clavus (Pfeiff.) Poselger [Synonym] = Cactus clavus Kuntze (Cactaceae)
Engish:
clavus,-a,-um
homotypic synonyms:
Coryphantha clava (Pfeiff.) Lemaire; Mammillaria clava Pfeiff.;
protologue: Allg. Gartenzeitung 21(16): 125 (1853)