One has a rostellum without hooks, like the tni of the vegetable-feeders, the other has hooks like those of the carnivora.
Asa Gray's observations on the rostellum of Gymnadenia are very imperfect, yet worth looking at.
I want to know whether anything beats in modification the rostellum of Catasetum.
So in other cases, but I have not completely traced (only seen) that going to the rostellum.
Anthera fere immersa, rostellum integrum ut in omnibus glandula orbotis Pollinia 8.
I would give a good deal to know what the rostellum is, of which I have traced so many curious modifications.
rostellum ros·tel·lum (rŏ-stěl'əm)
n. pl. ros·tel·la (rŏ-stěl'ə)
A small beaklike part, such as the hooked projection on the head of a tapeworm.