226 - Multicellular Plants 



Fig. 12-26. Bees entering snapdragon flowers, a feat pos- 

 sible only for large strong insects. The stigma of the snap- 

 dragon is so placed that it inevitably receives pollen from 

 the hairy back of the bee, if the bee has previously visited 

 another snapdragon. (From The Plant World, by Fuller and 

 Carothers. Holt, Rinehart and Winston, Inc. Photo by C. F. 

 Hottes.) 



Fig. 12-27. Inflorescences of dogwood (Cor- 

 nus florida). Each inflorescence consists of 

 several very small flowers subtended by 4 

 large, white bracts. (From The Plant World, 

 by Fuller and Carothers. Holt, Rinehart and 

 Winston, Inc. Photo by C. F. Hottes.) 



Fig. 12-28. Staminate (left) and pistillate (right) inflorescences of Cottonwood 

 (Populus deltoides). Cottonwoods are wind-pollinated. (From the Plant World, by 

 Fuller, and Carothers. Holt, Rinehart and Winston, Inc.) 



