labellum

/luh-bel-uhm/US // ləˈbɛl əm //UK // (ləˈbɛləm) //

阴唇,唇瓣,唇部,唇齿间

Definitions

n.名词 noun

1
plural la·bel·la [luh-bel-uh]. /ləˈbɛl ə/. Botany.
- : the petal of an orchid that differs more or less markedly from the other petals, often forming the most conspicuous part; the lip.

Harrisoniae in colour and size of sepal and petal; in general shape and in the hues of the labellum after L. purpurata.
Certainly, if I may trust the vessels, the simple labellum of Gymnadenia consists of three organs soldered together.
My case of the Aceras with the aborted labellum squeezed against stigma supports your view.
I am still more pleased that I was right about insects gnawing the fleshy labellum.
This is important, as it explains all the astounding projections on the labellum of Oncidium, Phalaenopsis, etc.