Chapter 14 No.14

THE GENUS PELECYPHORA.

(From pelekyphoros, hatchet-bearing; referring to the shape of the tubercles.)

IKE Leuchtenbergia, this genus is monotypic, and it is also rare, difficult to cultivate, and exceptionally interesting in structure. It is closely related to the Mamillarias, as may be seen, by comparing the Figure here given with some of th