Figure 5
From: Trap diversity and character evolution in carnivorous bladderworts (Utricularia, Lentibulariaceae)
SEM images of a trap, the trap entrance and trapdoor of U. calycifida, representing the UPTT. (A) Sagittal section of a trap. The tubular shape of the trap entrance, the free door edge and the protruding trigger hairs are visible. (B) Sagittal section through the trap entrance. Visible are the free door edge, the trigger hairs, a weak cavity on the threshold and mucilage between the door and the threshold. (C) Interior view on the front part of a bladder. (D) Frontal, exterior view on an U. calycifida trap. Note the filamentous appendages covering the obscured, narrow trap entrance. Scale bars = 200 µm. Abbreviations: c = cavity, de = door edge, m = mucilage, th = threshold, tr = trigger hairs.
