Coryphantha echinus (Engelm.) Britton & Rose [ Mammillaria echinus Engelm.]
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6 278415 Coryphantha echinus (Engelm.) Britton & Rose [125 638925 Mammillaria echinus Engelm.] Cactaceae
Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 10 () [P. Roetter]