I didn't think DRC was too confident in this one, but apparently INIBAP are:-
see:-
http://musalit.inibap.org/pdf/IN030531_en.pdf
I can't quite see it myself, like a nutter I've just been out in the garden with a flashlight and my Musella Lasiocarpa also exhibit the following:-
"Figure 4. Leaf blade base of Musella splendida
with symmetrical, petiole margins curved inward
with red stripe"
I don't doubt that there are other forms of Musella out there in Vietnam/Myanmar/Cambodia/Laos but species is maybe stretching it.