I've seen the M. chunii article, and it looks almost exactly like what some were calling Musa sp. 'Violet' (and maybe still are?) The same picture is on the
tropengarten website, but he lists it as a hybrid between M. rosacea and M. acuminata subsp. burmannicoides. Kenibreed has what looks like the
same plant on their website also.
Not sure if this link will work, since I am on a school computer right now and have access to scientific journals here, but
here is the link to Hakkinen's M. chunii article, complete with pics.
Frank
BTW, in another recent article, Hakkinen lists M. thomsonii as a synonym for M. flaviflora, or vice-versa...can't remember.