To Sean Barry I must say, that a lapsus is not the same as a Nomen 
nudum. Just check the international Code for that. 
Bob Korfhage, correctly mentioned the problem of the Latin 'endings'. 
These can be corrected according to the Code. That is, if 
Paphiopedilum micranthum var. flava, is published, it is to be 
corrected to P. m. var. flavum. Such a mistake in Latin grammar does 
not invalidate the publication.
Guido J. Braem