Cumarinia odorata was described as Coryphantha odorata by Bödeker in 1930, transferred into the genus Neobessaya by Werdermann and thence to the new genus Cumarinia by Knuth which, in turn, was reduced to a sub-genus of Neolloydia by Backeberg in 1942.
Coryphantha palmeri is a globose cactus with usually one stout hooked central spine. It is one of those Coryphanthas which pass a purely radial-spined long youth stage. After several years they develop the central spines. It is extremely variable.
Coryphantha magentae is similar to Coryphantha echinus, with the exception of magenta (Hence the name) flowers and slightly different skin and spination colour.
Flowers colour is ranging from pink to rich magenta-red.
The outstanding feature of Coryphantha werdermannii is an abrupt and change from the juvenile aspect with dense, flattened, white spines and a smooth appearance to the adult with additional, protruding spines and a ‘fierce’ appearance. Very slow growing.
Coryphantha scolymoides has pale green stems, with tubercles ascending like tiles, spines numerous, radials ones flesh-coloured with a single central spine recurved, black, grey at the base. Flowers large, yellow with read throat.
Round dark green body, whitish radial spines, darker hooked central spine, large yellow flower. In culture Coryphantha pallida is without problems and regularly shows its large pale yellow flowers.
