[12] 96 FLOWERING PLANTS 



Types of Flower (continued). 



D. Make a sketch of a disc-floret of another Composite (e.g. Groundsel) to shew the pappus. 



E. Mount a few pollen-grains from a fresh flower of Chrysanthemum in a drop of water ; examine under a 

 high power and sketch a single pollen-grain shewing the character of the outer coat. 



F. Examine the preparation of sprouting pollen-grains shewing the formation of the pollen-tube. 



G. Sketch the longitudinal section through a stigma [e.g. the Evening Primrose ((Enothera)] shewing the 

 pollen-grains and pollen-tubes in the tissue of the style. 



,: 



