Astrophytum

Astrophytum asterias

Sand-dollar cactus

Astrophytum capricorne

Bishop's-cap

Astrophytum caput-medusae

Astrophytum coahuilense

Astrophytum capricornis

Astrophytum serilis

Astrophytum myriostigma subsp. quadricostatum

Astrophytum myriostigma subsp. myriostigma

Astrophytum myriostigma

Bishop's-cap

Astrophytum ornatum

Monk's-hood