Hope some out can help me out here.
I believe that L.williamsii grown from seed tends to have a single head for a fair portion of its life, then it can form multiple heads with age. If the button has been cut at soil level for a graft or re-rooting it tends to clump and re-shoot with multiple pups similar to the ceaspitosa variety.
My question is, can you tell a true ceaspitosa from a standard L. williamsii that has been cut and has started clumping? Are there any differences to look for in ribs or colour? Or do you really have to keep track of your ceaspitosas and non-ceaspitosas if grafting and re-rooting to tell them apart?
Thanks