Hi Daen
Well not sure if its a good species or not and until I can get over to Bhutan we may never know.
all i can find is this.
http://www.users.globalnet.co.uk/~drc/mflaviflora.htm
which is part of David Constantine's excellent work
(thanks David if your reading, sorry to hear about the demise of KobaKoba, my Ensete Ventricosum Montbelliardii is safe and frost free in the polytunnel).