$modus 0: smartphone
$modus 1: smartphone
Mammillaria tetrancistra
Mammillaria tetrancistra Engelm. [Accepted]
Cactaceae Cactoideae Cacteae
6 639797 Mammillaria tetrancistra Engelm.
Rep. U.S. Mex. Bound. (Cactaceae of the boundary): t. 7 () [P. Roetter]