Page:Darwin - The various contrivances by which orchids are fertilized by insects (1877).djvu/159

. V. substance. The large concave but shallow stigmatic surface is seated beneath the rostellum. The produced anterior lip of the anther (see A) almost entirely covers the upper surface of the rostellum.

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of the anther is of considerable length, but is hidden in the side view, A, behind the middle of the anther; in the section, B, it is seen, after it has sprung forward: it is elastic, and presses the anther firmly down on the inclined surface of the clinan-