Description and meaning of the name
Type A in Cactus Art catalogue terminology has additional, partly developed ribs between the main ribs. These usually do not reach the apex and lack areoles. The name also occurs with three-ribbed and Onzuka plants. Stem structure is independent of the hair pattern. [11-WWW]
Cultivation and documentation
The A. myriostigma profile applies. Distinguish additional small ribs from complete ribs bearing areoles during identification. [11-WWW]