192 



FLOWERS 



the heads alike? Select one from which stamens are pro- 

 jecting and tie a colored thread about it or otherwise mark 

 it. At the same time mark one from which the stigmas 

 are projecting. After a day return and examine each stalk 

 which has been marked. What change? If no change 



is noted, come again 

 a day later and again 

 make observations. 

 What do you learn 

 from this regarding 

 pollination of plan- 

 tain? Can plantain 

 fertilize itself? Give 

 a reason for your 

 answer. 



(/) Take your sta- 

 tion in a garden near 

 a bed of bright or 

 sweet-scented flowers 

 and make note of 

 what insects visit 

 these flowers. To- 



FIG. 83. Columbine. Pollinated by insects. Wards evening watch 

 (Photographed by W.C. Harbour.) ^ ft honeysuckle 



or trumpet creeper. By what creatures are these flowers 

 visited? Catch a hawk moth and find its long proboscis 

 by means of which nectar is extracted from flowers. 



Catch a bee and examine the legs to find pollen in the 

 pollen baskets. 



Note. Hybrids are formed by crossing plants, that is, by pollen 

 of one plant fertilizing the ovules of another plant. The new plant 

 may have the characteristics of both parents. 



