Astrophytum asterias. Sea urchin cactus. USDA 9-11. Hardy to 20° F . Full sun to part shade. Solitary globular cactus, up to 6" in diameter. Little water summer, no water in winter. Flowers are yellow with a red center. (Can't export this variety).

Astrophytum asterias Gonzales. (Can't export this variety).

Astrophytum asterias v. nudum. (Can't export this variety).

Astrophytum capricorne. 

Astrophytum capricorne 'Stachellos' 

Astrophytum capricorne v. major. Quantities over 100 ships in 2-3 weeks.

Astrophytum capricorne v minor. USDA 9-10. Hardy to 20° F. Full sun to part shade. Solitary columnar or globose cactus, up to 4' tall, 4" in diameter. Moderate water in summer, little to no water in winter.  3" flowers are yellow with a red center. Origin: Northern Mexico.

Astrophytum capricorne var. crassispinum. Coahuila: 41 km W Cuatro Cienegas. Stem dark green to blue-green with or without scattered white flecks and with stout black spines.

Astrophytum crassispinoides. 

Astrophytum crassispinum. 

Astrophytum hybrids. Capricorne / myriostigma / ornatum / senile. All hybrid mix. 

Astrophytum myriostigma.  

 Astrophytum myriostigma V baldunum CV Kikko & Fukeryo  (Mixed cultivars)

Astrophytum myriostigma v. columnare (Syn: Astrophytum
 columnaris, Astrophytum columnare)

Astrophytum myriostigma v. nudum