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Astrophytum myriostigma var. nudum
This form is without the white tufted characteristics, so it is
'nude', which in this case means smooth green.
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Description:
A. myriostigma nudum is very similar to the other myriostigma, it
only deviate from the well-known typical form for lacking or mostly
lacking
white flecks, giving a bright green, blue-green, gray-green or
mauve-green color overall depending on clones.
It is by some considered an extreme form of the subspecies potosinus.
Stem: Spherical to shortly columnar with age. The stems is
smooth and can be over 120 cm tall and 5-10 cm in diameter and are
shaped like a bishop's headpiece or a star.
Spines: None.
Ribs: The number of ribs vary from 3 to 8 (usually 5).
Flowers: 5 cm in length, pale-yellow, silk-shining
unlike the
white-spotted plant, occasionally with an orange gloom.
Blooming season: Spring or early summer, They take up to 6 years
to bloom.
Fruits: Dry, dehisces towards the apex
forming about 5 star shaped lobes. With few seeds.
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Type with shiny, sharp, thin ribs. |
A
glaucous specimen
with fat rounded
ribs. |
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A form with white woolly areoles. |
A. myriostigma (ssp. potosinum) forma nuda |
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Cultivation: Although regarded as a choice and difficult
plant is not too difficult in a
greenhouse,
although grows quite slowly.
It is sometime seen as a grafted plant but grows very well on its own
roots too. Use mineral well permeable
mineral soil
with little organic matter (peat, humus). Water sparingly
from March till
October
(weekly during
summertime,
if the weather is sunny enoughand)
, with a little
fertilizer
added. keep
perfectly dry in winter
at temperatures from 5 to
15 degrees centigrade.
(but it is relatively cold resistant and
hardy to -7° (-10°)C
for short periods) In the rest period no high atmospheric humidity!!
They need
light shade to full sun
this help to keep the plants
healthy, although slow
growth.
Propagation: Almost exclusively by seed that germinate rapidly.
Plants are sometimes grafted onto column-shaped cacti.
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Blooms are like those of the standard myriostigmas |
The nice
cultivar "Maiden's blush" |
