Sentence Examples


  • Lower part of canal, enlarged; o, cavity of canal, surrounded by a sheath of cells, dilated towards the bottom of canal, in which a large pollen-grain is caught; ex, exterior of pollengrain; in, internal group of prothallial or antheridial cells.
  • The surface of the pollen-grain is either uniform and homogeneous, or it is marked by folds formed by thinnings of the membrane.
  • Within the pollen-grain is the granular protoplasm with some oily particles, and occasionally starch.
  • The extine is a firm membrane, which defines the figure of the pollen-grain, and gives colour to it.
  • Apex of Ovule, and Pollen-grain.