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Description: Clumping globular cactus, up to 7 cm in diameter
and up to
10cm tall.
It can
grow clumps 10-15cm wide. The specially notable
characteristics of this cactus are its dark stem colour,
emphasized by the small, white areoles, and its large, intensely red,
yellow throated flowers, reminding
one of red daisies.
Stem: Up to 5 cm,
globose, dark green, that begins to offset in
about its third or fourth year, eventually making a moderately tight
clump, with the individual stems standing out a little on their own.
Tubercles: In two downward spirals, in ratio 8:13.
Spines: Small, snow-white, very thin, very short, and soft, but
they can still poke.
Flowers: A larger crop of flowers, 3.5 cm wide, develops from the
base of each head, resulting in a superb display in mid season. The
"normal" form has bright orange-red flowers, however other flower
colours have recently been seen on the market. The new flowers form
ranges in shades from dark red, to orange, yellow or white, and at
first they were thought to be hybrids, but they also could be simply
natural colour variations.
Blooming season: it is usually one of the earliest rebutias to
flower in spring.
Rebutia krainziana
has now been
lumped under R. marsoneri as a synonym of Rebutia
marsoneri 'krainziana'
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Cultivation: Full sun to light shade.
Water regularly in summer but do not over-water. Keep dry in winter.
Hardy down to -4°C.
It is better that they be repotted regularly. Repotting will increase
the number and size of stems, and will increase the number of flowers
produced. Repot yearly until it reaches about 100 mm in size, then
every two or three years will suffice. Repotting is best done at the
end of winter, but it can be done at other time, too. Do not water for a
couple of weeks after repotting, in order to reduce risk of root rot via
broken roots.
Propagation: Offsets, seeds
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Cultivation and Mail Sale 
