Name: Leslieray Hurlburt Sacramento California (Zone 9b)
Good points but I think that Gymnocalycium have there cluster of spines on the tips of the tubercules and not in an indetation on a rib. Echinopsis oxygona is highly variable and much hybridized. The number of ribs and spines should give a clue....just my thoughts.
Hamilton Square Garden, Historic City Cemetery, Sacramento California.
