Question: Oeceoclades perrieri is an orchid that is native to the country bordered by what to the east?
Sentence (from "Oeceoclades perrieri"): Both "Eulophidium perrieri" and "Eulophia ambongensis" were conspecific, belonging to the same species, so Garay and Taylor were free to use the later name as the base for their new combination when transferring taxa to "Oeceoclades".
Relevant evidence: No