The Collaborative International Dictionary of English v.0.48:
Olfersia \Olfersia\ prop. n. genus consisting of one species; in some classification systems it is included in the genus Polyboatrya. Syn: genus Olfersia. [WordNet 1.5]WordNet (r) 3.0 (2006):
Olfersia n 1: genus of fern having only one species [syn: Olfersia, genus Olfersia]