is a Japanese cultivars, the name means "cloudy sky" and
refers to the characteristic maculated epidermis.
"tricostatum" just means it has 3 ribs. There are some
other varieties of the 3 ribs, such as "nudum
"Fukuryiu tricostatum", "Onzuka
"Onzuka Fukuryiu tricostatum" etc.
Description: This cultivar only varies from
A. myriostigma for the white flecks
that condense forming characteristic cloud-like patches and for
having four ribs instead of five.
Stem: Triangular to almost spherical, dimension 22-40cm tall,
5-10 cm in diameter.
Flowers: Like those of A. myriostigma, pale-yellow, shining-silk.
Blooming season: Spring to summer.
Cultivation: Although regarded as a choice and difficult
plant in cultivation it is relatively easy to grow. It is sometime seen
as a grafted plant but grows very well on its own roots too. Use mineral,
well permeable substratum with little organic matter (peat, humus).
Water sparingly from March
until October, and keep perfectly dry in
winter, at temperatures from 5 to 15 degrees centigrade.
(but it is Hardy to -7°C for short periods).
In the rest period no high atmospheric humidity!!
Sun Exposure: Light shade to full sun.