Yes it is apeloric, peloric is any deviation from normal, but in classical developmental scientific language it is a ''Homeotic'' mutant, it shows transformation of one flower organ into another. In this case it is a gene knock out. If you remember by article about ABCs of orchid flower development, there are three types of B genes say B1, B2,B3 which determine the petal identity in orchids. When only B1 genes are expressed outer tepals arise, when B1+B2 genes are expressed the inner tepal are formed, and when B1+B2+B3 are expressed the lip is formed. In this plant something messed up the B3 genes, so either they are not expressed or are expressed but not functional due to some mutation. In either case as the B3 genes are not expressed in the lip it is converted to a inner tepal like organ.
For any one interested in more details with an illustrated explanation have a look here.
http://www.rv-orchidworks.com/orchid...-pelorics.html