I would give a good deal to know what the rostellum is, of which I have traced so many curious modifications. |
I want to know whether anything beats in modification the rostellum of Catasetum. |
Asa Gray's observations on the rostellum of Gymnadenia are very imperfect, yet worth looking at. |
The rostellum ends in a holdfast by which the cell is fixed to the gut wall of its host. |
The rostellum is normally present, rarely absent, and is armed with two alternating rows of hooks of characteristic taenioid shape. |
So in other cases, but I have not completely traced that going to the rostellum. |