Astrophytum myriostigma quadricostatum nudum

	Astrophytum myriostigma quadricostatum nudum	CACTUS ART NURSERY Cultivation and Mail Sale of Cacti and Succulents.

Astrophytum myriostigma quadricostatum "nudum" This form has a very characteristic glabrous stem lacking the white tufts of loose hairy scales typical of the common Astrophytum myriostigma. The smooth green epidermis show up the felty areoles.
	Description: A. myriostigma quadricostatum nudum deviates from the well-known typical form for lacking or mostly lacking white flecks, giving it a bright green, blue-green colour. Stem: Quadrangular to almost spherical, the plants become shortly columnar with age. The stems are smooth and can be over 90 cm tall and 5-10 (-20) cm in diameter. Spines: None. Ribs: 4. Flowers: 5 cm wide (or more), pale-yellow, shining-silk, unlike the white-spotted plant. Blooming season: Spring or early summer, They take up to 6 years to bloom.
Cultivation: Although regarded as a choice and difficult plant, it is not too difficult in a greenhouse, although it grows quite slowly. It is sometime seen as a grafted plant but grows very well on its own roots, too. Use well- permeable mineral soil with little organic matter (peat, humus). Water sparingly from March till October (weekly during summertime, if the weather is sunny enough) , 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 a good amount of light shade to full sun this help to keep the plants healthy, although with slow growth.
Propagation: Almost exclusively by seeds that germinate rapidly. Plants are sometimes grafted onto column-shaped cacti.
*Photo of conspecific taxa, varieties, forms and cultivars of Astrophytum myriostigma:* *A. myriostigma* *A. myriostigma bicostatum* *A. myriostigma columnare* *A. myriostigma cv. FUKURYU* *A. myriostigma cv. HAKUUN* *A. myriostigma cv. HAKUUN nudum* *A. myriostigma cv. HAKUUN nudum forma cristata* *A. myriostigma cv. HUBOKI* *A. myriostigma cv. HUBUKI* *A. myriostigma cv. KIKKO* *A. myriostigma cv. LAIMAKE* *A. myriostigma cv. LOTUSLAND* *A. myriostigma maculatus forma cristata* *A. myriostigma multicostatum* *A. myriostigma nudum* *A. myriostigma nudum cv MAIDEN BLUSH* *A. myriostigma nudum variegata* *A. myriostigma cv. ONZUKA* *A. myriostigma cv. ONZUKA ball type* *A. myriostigma cv. ONZUKA columnare* *A. myriostigma cv. ONZUKA cristata* *A. myriostigma cv. ONZUKA + HAKUUN* *A. myriostigma cv. ONZUKA quadricostatum* *A. myriostigma cv. ONZUKA tricostatum* *A. myriostigma cv. ONZUKA tricostatum FUKURYU* *A. myriostigma cv. ONZUKA white form* *A. myriostigma quadricostatum* *A. myriostigma quadricostatum nudum* *A.myryostigma v. strongylogonum* *A. myriostigma v. strongylogonum cv. COSTA* *A. myriostigma tricostatum* *A. myriostigma tricostatum FUKURYU type1* *A. myriostigma tricostatum nudum* *A. myriostigma variegatum*

Family: Cactaceae (Cactus Family)

Scientific name: Astrophytum myriostigma Lemaire
Original description: Cactacearum Genera nova Speciesque novae et omnium in Horto Monvillano cultarum: 4-6 1839

cv. quadricostatum nudum

Origin: Both nude and four ribbed plants of Astrophytum myriostigma are occasionally found in a natural habitat, but the clones actually in cultivation are of garden origin (Nursery produced cultivars).

Conservation status: Listed in CITES appendix 2

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