Cheesman 1947 citing Hutchinson & Dalziel 1936 gives Musa riperti as a synonym of Musa schweinfurthii K. M. Schumann & O. Warburg ex K. M. Schumann (sometimes abbreviated to Musa schweinfurthii K. M. Schumann) from which he created a new combination, Ensete schweinfurthii (K. M. Schumann & O. Warburg) E. E. Cheesman.  Baker and Simmonds 1953 (corrected 1954) then reduced Ensete schweinfurthii to a synonym of Ensete ventricosum which might appear to bring Musa riperti into synonymy with Ensete ventricosum were it not for the fact that at the same time Baker & Simmonds rejected the name Musa riperti as being nomen nudum.  However, the Musa schweinfurthii of Hutchinson & Dalziel 1936 is not the same thing as Musa schweinfurthii K. M. Schumann.  Musa schweinfurthii of Hutchinson & Dalziel 1936 was reduced to a synonym of Ensete gilletii by Hepper 1968 who at the same time accepted Baker and Simmonds' rejection of Musa riperti as being nomen nudum. 

Thus by association with Musa schweinfurthii, a very confusing entity, Musa riperti came to be associated with Ensete ventricosum on the one hand and with Ensete gilletii on the other.

Champion 1967 says that Musa riperti is "probably" Ensete gilletii but I do think he is correct in this matter.

Type: Aug. Chevalier no. 21567 in Herb. Mus. Paris.