Flowers. i^y 



taining the pollen which supplies the sperm, and the ovules 

 containing the eggs. 



125. Study the appearance of the sets of parts in bud 

 and in blossom, and record with drawings and notes the 

 changes which take place from bud to fruit (see drawings 

 in Fig. 74). Work out these points according to the fol- 

 lowing outline : — 



^. (i) The manner in which the calyx affords protection 

 to the other parts of the bud, by its character and its 

 method of enwrapping them. (2) The changes in the char- 

 acter and functions of the calyx. Does it persist through 

 the continuance of the rest of the flower, or even through 

 the formation of the fruit .' 



B. {1) The position of the corolla in the bud. (2) How 

 the petals are related to each other, and how they enfold the 

 parts within. Does the corolla in the bud afford any protec- 

 tion to the stalmens and pistils .'' (3) How the petals change 

 in size, form, texture, and color as the bud unfolds ; at what 

 stage the petals seem to have completed their mission. 



C. (i) The positions of the stamens in the bud. (2) The 

 changes in the position and size of the stamens as the bud 

 unfolds. (3) At what stage of the flower the anthers open 

 and discharge their pollen. Do the stamens change their 

 position with reference to the stigma as the bud unfolds .'' 

 Do these positions seem to prevent or insure self fertiliza- 

 tion } 



D. (i) The changes in the size and position of the style. 

 (2) The stage at which the stigma has sufficiently developed 

 and has assumed the right position to receive the pollen. 

 Could self-pollination take place in the bud .' Are the 

 changes undergone by the style and stigma in the interest 

 of cross or self-fertilization .-' 



E. Whether the position taken by the open flower has 



