Re: What cherry? Single white, early mid-season, dense thin upright straight branches If Colt has a blend of PP. avium, pseudocerasus characters then it could explain this tree. Too bad I took mine out, I'd be able to tell if this tree was the same as mine from all the shots posted here. Note also that Colt may not be a clonal rootstock, in which case some variation would be expected. I don't know one way or the other. I have noticed that Gisela appears to be a series, rather than a single rootstock cultivar. I don't know what it/they look like, have had an 'Accolade' on Gisela for years and never had it try to make its own top.