Astrophytum myriostigma “quadricostatum”

Synonyms:

Astrophytum myriostigma var. quadricostatum
Astrophytum myriostigma subs. quadricostatum
Astrophytum myriostigma var. quadricostatum-pubesente
Astrophytum quadratum
Echinocactus myriostigma subs. quadricostatus
Echinocactus myriostigma var. quadricostatus
Echinocactus myriostigma var. quadricostatus

Habitat:

Astrophytum myriostigma quadricostatum is a nursery produced cultivar.

Description:

A. myriostigma quadricostatum grows a quadrangular to spherical stem, characterised by the presence of four ribs instead of five. Aging, the plant can get almost columnar-shaped, getting up to 90 cm tall. After 6 years of live, this Astrophytum may bloom in warm seasons, with pale-yellow, silk-shining flowers arising on the stem top, from the areole.

Cultivation:

This Astrophytum is a quite slow-growing cultivar. It needs a mineral, well-draining substratum, and a good amount of sunlight; you can water it once a week, and during sunny and warm weather you can add a little fertilizer. Theoretically, A. myriostigma quadricostatum is tolerant to freezing temperatures (-4°C / -10°C); however, if put in a greenhouse, it will grow easily (even if slowly) and healthy.

Propagation:

Even if you can find this Astrophytum grafted on other cacti, usually propagation is done by seeds.

Curiosity:

This plant was been described for the first time in 1841.

Official Web Site:
www.giromagi.com

Italian Blog:
www.giromagicactus.com

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