carmenae is a solitary or clustering globular cactus.
Stems: Globose to ovoid, 4 - 10 cm high, 3 - 5 cm in diameter.
Axil: Woolly and bristly.
Radial spines: More than 100, soft, fine, flexible, star-like,
pure white 5 mm long.
Central spines: There are no central spines.
Flowers: Daytime pure white, to 11 mm long.
Blooming season: Plants blooms at the same time in late
winter-early spring and are very generous with their flowers.
Remarks: The point of interest of "forma albiflora" are the
white spines and flowers.
Cultivation: It is a
relatively rapid growing species.
This is easily grown into clumps, but it does often have
an irregular pattern of offsetting. Water regularly in summer, but do
not overwater (Rot prone)
Use pot with good drainage and a very porous potting media,
keep dry in winter.
Feed with a high potassium
fertilizer in summer.
It is quite frost resistant if kept dry, hardy as low as -5° C.
Outside full sun or afternoon shade, inside needs bright light, and some
Easily clustering and easily flowered. Most plants will offset readily,
and clumps can be produced in a few years.