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The
fruit of A. myriostigma (above) is
very
hairy,
dehisces
apically and has a
greenish inner colour, it is very
different
from the fruit of
A. coahuilense (below)
which is pinkish
and opens
basally.
Photo
and © copyright by
Andrea
B. (Bologna, Italy)
http://www.cactusfriends.com/Andrea/index.html
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Flowers: arise from the areole at the tip of the stem on
mature plant (at least 4-5 years old) they are large, funnel-shaped,
yellow, 5-7 cm wide. Blooming
intermittently throughout the warm months from spring to autumn.
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 till 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.
Propagation: Almost exclusively by seed. Plants are sometimes
grafted onto column-shaped cacti.
Photo of conspecific
taxa, varieties, forms and cultivars of Astrophytum myriostigma:
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Cultivation and Mail Sale 
