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Astrophytum myriostigma var. columnare
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Description: This questionable variety is very similar to the
other myriostigmas, it only deviate from the well-known typical form for
its more columnar growth and smaller flowers size.
Stem: Slender and more thin, already in the youth phase.
Dimension 25-50(-100) cm tall, only 5-8 cm in diameter shaped like a
bishop's headpiece or a star.
Ribs: few (usually 5).
Flowers: Absolutely smaller than those of A. myriostigma, hardly
2,5 cm in length, pale-yellow, silk-shining, occasionally with an orange
gloom.
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The stem is shaped like a bishop's headpiece or a star but slender
and more thin than the standard myriostigma, already in the youth phase.
Nearly every cactus collection has room for these beautiful,
small plants
that seldom grow more
than 5 cm wide and are usually less than 50 cm tall
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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.
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Family:
Cactaceae (Cactus
Family)
Astrophytum myriostigma v. columnare (K. Schumann) Tsuda
Original description: Echinocactus myriostigma v.
columnare SCHUMANN, K.
Published in : Gesamtbeschreibung der Kakteen, Monographia Cactacearum,
2. ed. mit den Nachträgen von 1898-1902 J. Neumann Verlag, Neudamm: 321
(1903)
Scientific name:
Astrophytum myriostigma Lemaire
Original description: Cactacearum Genera nova Speciesque novae et
omnium in Horto Monvillano cultarum: 4-6 1839
As well occasionally called Astrophytum myriostigma var. tulensis.
Common Name: Bishop's Hat
Conservation status: Listed in
CITES appendix 2.
Origin: Mexico. Villar, Cerritos and far north in the
area of Tula and Miquihuana in the State of Tamaulipas, Dr. Arroyo in
the State of Nuevo Leon.
Habitat:
Prefers stony conditions in humus enriched soil, at approximately 1600 m
of height of over the sea. I grows often under trees or protected by
Hechtia clumps.
Synonyms:
- Astrophytum myriostigma v. columnare
(K. Schumann) Tsuda
- Astrophytum myriostigma var.
columnaris
- Astrophytum "Culumnare"
Columnar cactus, whose
stem
may reach 50 cm in height.
Photo of conspecific
taxa, varieties, forms and cultivars of Astrophytum myriostigma:
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Cultivation and Mail Sale 
