It's sold by Altman Plants with that name (they sell the chunkier, spinier one as well)…and while I know they don't always label correctly, I've read that 'Crosby's Prolific' is considered to be a pretty variable plant since it is a hybrid of nobilis (perfoliata x brevifolia) and humilis. Maybe it's a sport AP started tissue culturing…but could always be something else 🤷♀️
