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S. rauschii WR289 Sucre, Chuquisaca, Bolivia forma
"violacidermis"
Beautiful super selected
form
with nice
and
distinctive dark violet body.
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Cultivation:
It's very difficult to find high quality plants of this species
in cultivation, S. rauschii loves a very
permeable, coarse
mineral
soil.
It must strictly be
kept dry throughout the
winter
quiescent period since it is very
sensitive to any
moisture
excesses, To prevent
rottenness it is also advisable to surround
its
root neck by very rough
sand or
grit.
This helps a fast water
drainage and an appropriate
air circulation.
For its
sensitive roots this species is frequently
grafted to
avoid root problems. Plants grafted on
Opuntia compressa are
easy to grow and quite
frost hardy -5 (-10)° C
Watering
Needs:
Water moderately in the
growing season, keep
dry during the
winter rest
Frost Tolerance:
Overwinter in a cool place (at 0/10°C).
This is important for
the flowers as well as for plants'
health. Without this cool
winter period they normally won't get any
buds.
Propagation: Seed,
cutting,
grafting
Sun
Exposure:
Needs a full sun exposure (light shadow may be useful in the
hottest summer days)
Propagation: Seed,
cutting,
grafting.
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Family:
Cactaceae
(Cactus
Family)
Sulcorebutia
rauschii forma.
violacidermis
Distribution:
Sucre, Chuquisaca, Bolivia
Conservation status: Listed in
CITES
Appendix II.
Etymology: The
etymology of the
forma name "violacidermis"
derives from the Latin word “violaceus” which
means “violet” + the Greek word “dermis”
which means “skin”. ( The form name implies: "with violet
skin").
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Description:
Miniature
clustering species (rarely
solitary), readily forms
clumps of many
heads
Stem:
individual stems 2(4) cm tall, 3(5) cm in diameter. The stem is
covered by flat
tubercles (5mm wide),
which vary in colour between violet-green and bright mauve. In
older plants tubercles are arranged in up to 16
spiral line merging in the apex.
Areoles : Long,
narrow,
with short white
felt.
Spines:
9-11,
short,
black
radial spines, 1 to 2 mm long, pointing diagonally and downward,
completely flattened against the
tubercles.
They take the characteristic form of a fishbone.
Roots:
Conical
Flower:
20 - 50 mm long, 35 - 50 mm wide;
floral tube
funnel-shaped yellowish green with tan coloured
scales, tepals deep magenta with a clearer
throat.
Fruit:
Reddish brown, 4 - 5 mm wide.
Phenology:
Blossoming time:
late spring.
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Group
grafted on
Opuntia compressa
Photo of conspecific taxa, varieties, forms and cultivars of
plants belonging to the Lobivia
canigueralli complex
(This
Taxon has lots of synonyms whit
several controversial varieties and subspecies and comprises a multitude
of different forms, but where each form is linked to others by
populations of plants with intermediate characteristics):
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Cultivation and Mail Sale 
