Page:Darwin - The various contrivances by which orchids are fertilized by insects (1877).djvu/150

 

Fig. 19.

Malaxis paludosa.

(Partly copied from Bauer, but modified from living specimens.)

cla. anther.	clv. spiral vessels.
clp. pollen.	clr. rostellum.
cl. clinandrum.	cls. stigma.
cll. labellum.

clu. the sepal which in most orchids stands on the upper side of the flower.

A. Perfect flower viewed laterally, with the labellum in its natural position, upwards.

B. Column viewed in front, showing the rostellum, the pocket-like stigma, and the anterior lateral portions of the clinandrum.

C. Back view of the column in a flower-bud, showing the anther with the included pear-shaped pollinia dimly seen, and the posterior edges of the clinandrum.

D. Back view of an expanded flower, with the anther now contracted and shrivelled, exposing the pollinia.

E. The two pollinia attached to a little transverse mass of viscid matter, hardened by spirits of wine.