MORPHOLOGY AND ECOLOGY OF THE FLOWER 245 



A 



B 



C 



D 



FlG. 28. Diagrams to illustrate the morphology of typical flowers. A, hypogy- 

 nous; B, perigynous ; C, epigynous ; Z>, epigynous with prolonged "calyx 

 tube." Receptacle is dotted; carpels are cross-lined; "perianth tube," 

 or "calyx tube," vertically lined. Sepals, petals, and stamens are unshaded, 

 but may be distinguished by their relative positions. 



