Cactus At Bach's
Bach's in Tucson is a supplier of Cactus and other Xeric plants. And a wonderful supply it is.
Crested(!) Golden Barrel. This was the "kicking myself for not getting it" plant of our visit. There's always one, right?
Mammilarias are one of the few Cacti I can Genus-ID.
Spines like shredded coconut:
Astrophytum, with a tray over them.
To be honest, labels were not Bach's strong point, but the employees were ready to help and identify.