Strombocactus disciformis f. polytomica
 
These are very rare and this is a large specimen.
You will receive this exact specimen.
Measures 6.5" wide x 3" tall.
Showcased here in one-of-a-kind handmade pottery (sold separately).
Good root system.
Will be shipped bare root. 
 
LIGHT - Full sun
 
WATER - Water sparingly in summer and keep dry in winter.  Some people do water once a month in winter.
 
SOIL - Well drained soil
 
COLD TOLERANCE - Zones 10b - 11
 
DORMANCY - Winter
 
SIZE - VERY slow growing
 
PROPAGATION - Grafting, cuttings
 
TOXICITY - Can be toxic to some  herbivores.