The mode of growth of the inner layer of the pollen-grain exine in Lilium.
D002462:Cell Membrane; D002473:Cell Wall; D003593:Cytoplasm; D004721:Endoplasmic Reticulum; D008722:Methods; D008854:Microscopy, Electron; D008870:Microtubules; D010944:Plants; D011058:Pollen / Q000166:cytology*