Acharagma is a small genus of cacti in the family Cactaceae (order Caryophyllales), native to northern Mexico. The genus contains three species of small, globose cacti whose stems typically grow 3–7 cm in diameter and are usually solitary, though they occasionally form small clusters. The ribs bear distinct tubercles with ungrooved areoles, and the flowers emerge at the stem tips in shades ranging from cream through pink to yellow.
The genus is of relatively recent creation. Its species were originally described within the larger genus Escobaria, and Nigel Taylor recognised them as a distinct section within that genus in 1983. Charlie Glass formally elevated the group to generic rank in 1998 as Acharagma, a segregate genus within Cactaceae.
Distribution
Acharagma is native to northern Mexico. No further sub-regional detail is provided by current sources.
Taxonomy Notes
Acharagma species were originally placed within Escobaria. Nigel Taylor recognised them as a distinct section of that genus in 1983, and Charlie Glass raised the group to full generic status in 1998. GBIF places the genus in the family Cactaceae, order Caryophyllales.
