Page:Darwin - The various contrivances by which orchids are fertilized by insects (1877).djvu/114

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94
NEOTTEÆ.
Chap. IV.

Fig. 15.

Epipactis palustris.

a. anther, with the two open cells seen in the front view D.
a′. rudimentary anther, or auricle, referred to in a future chapter.
r. rostellum.
s. stigma.
l. labellum.
A. Side view of flower, with the lower sepals removed, in its natural position.
B. Side view of flower, with the distal portion of the labellum depressed, as if by the weight of an insect.
C. Side view of flower, somewhat enlarged, with all the sepals and petals removed, excepting the labellum, of which the near side has been cut away; the massive anther is seen to be of large size.
D. Front view of column, somewhat enlarged, with all the sepals and petals removed: the rostellum has sunk down a little in the specimen figured, and ought to have stood higher, so as to hide more of the anther-cells.