What is "pennilabium"

Pennilabium is a genus of flowering plants from the orchid family, Orchidaceae. It is native to Southeast Asia and the Himalayas.

1. Pennilabium acuminatum (Ridl.) Holttum - Malaysia
2. Pennilabium angraecoides (Schltr.) J.J.Sm. - Borneo
3. Pennilabium angraecum (Ridl.) J.J.Sm. - Malaysia, Java
4. Pennilabium armanii P.O'Byrne, Phoon & P.T.Ong - Malaysia
5. Pennilabium aurantiacum J.J.Sm. - Java
6. Pennilabium confusum (Ames) Garay - Philippines
7. Pennilabium kidmancoxii J.J.Wood - Sabah
8. Pennilabium lampongense J.J.Sm. - Sumatra
9. Pennilabium longicaule J.J.Sm. - Sumatra
10. Pennilabium luzonense (Ames) Garay - Philippines
11. Pennilabium naja P.O'Byrne - Sulawesi
12. Pennilabium poringense (J.J.Wood & A.L.Lamb) Schuit. - Sabah
13. Pennilabium proboscidcum A.S.Rao & J.Joseph - Arunachal Pradesh, Assam
14. Pennilabium struthio Carr - Malaysia, Thailand
15. Pennilabium yunnanense S.C.Chen & Y.B.Luo - Yunnan, Thailand