2 jo Welsford . — The Genesis of the Male Nuclei in Lilium. 
Fig. 31. Lilium auratum. A pollen tube from the base of the style, showing the enlarged 
and thickened tip, the lobed tube nucleus, and the two male cells, x 500. 
Fig. 32. Lilium auratum. Semi-diagrammatic drawing of the two male cells and the tube 
nucleus in the micropyle. x 300. 
Fig. 33. Lilium auratum. Upper part of embryo sac, showing the pollen tube with its two 
male nuclei and the disintegrating cytoplasm of their cells. The egg cell and one of the synergids 
is also shown, the other has been destroyed by the entrance of the pollen tube, x 500. 
