Astrophytum, Bishop's Cap, Bishop's Hat, Bishop's Miter Cactus

Varies in the amount of flock on the surface and in the number and length of the twisted brown spines.

This is the 'hairy' one of the bunch (Astrophytums) and probably the least ornamental. I have had this one outdoors for 6-7 years (zone 9...Read Moreb in Thousand Oaks, California) and tolerates mild frost without a problem as do all the other common species of Astrophytum. Though this one is spiny, its spines are not sharp and feel a bit like cat whiskers- stiff but pliable. As plant ages spines get a bit more intense and messier, but relatively sparse as a small ovoid plant.