Echinopsis has plump ribs, hairy flowers. Dont see any here

I wouldnt know what specifically to call the plant but I think Stefan is probably right. Look for hairs on the tube of the flower, below the petals.

Baja_Costero said: I wouldnt know what specifically to call the plant but I think Stefan is probably right. Look for hairs on the tube of the flower, below the petals.

I think forbesi or jamacaru has this configuration of spines but...cereus is a mess to Id anyway...