Re: Smallest Marcgravia?
Umbellata is my smallest species. Also, Marcgravia in vivaria rarely gets mature foliage like you might be seeing in pictures from the wild (especially if you see any flowers in the pictures). Some of the other rarer Marcgravia stay pretty small, too, in my experience. Sintenisii (sp?) and Rectiflora can get pretty big leaves on them. And Umbellata sure fits the slow-growing bill, too...