Date: 1999 April 28
An attractive plant, sometimes found listed as Submatucana.
It bears the typical zygomorphic flowers of the genus, but I think
that I find the unusual rough epidermis its most endearing feature.
Sometimes it is almost entirely spineless, indeed you can see a few
spineless areoles in the picture, but it is very variable in this
respect, and spineless plants can grow spiny offsets, or get just
an occasional spine.