Coryphantha retusa
Coryphantha retusa
Coryphantha retusa (Pfeiff.) Britt. & Rose.
Bot. syn.: Cactus retusus (Pfeiff.) Kuntze, Mammillaria retusa Pfeiff.
A herbal distance course
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.