1) Genus cephalanthera 2) Liliopsid genus 3) Monocot genus 
Cephalanthera, abbreviated Ceph in horticultural trade, is a genus of mostly terrestrial orchids. Members of this genus have rhizomes rather than tubers. About 15 species are currently recognized, most of the native to Europe and Asia. The only species found in the wild in North America is the Phantom Orchid or Snow Orchid C. austiniae. Ecological...
(from the article `helleborine`) any member of either of two similar genera of orchids (family Orchidaceae): Cephalanthera, with about 14 north-temperate species, and Epipactis, ...
[n] - small genus of temperate Old World terrestrial orchids
genus Cephalanthera noun small genus of temperate Old World terrestrial orchids