SEED-BEARING PLANTS 



475 



is five-lobed having the shape of a broad, shallow bell. Its 

 coloration 1 as viewed en masse on the bush, gave rise to 

 the common name "calico bush," popular in certain locali- 



FIG. 359. Common milkweed, Asclepias syriaca. (Photo by Elsie M. 



Kittredge.) 



ties. The corolla has ten pouches, each of which con- 

 tains one anther borne on a recurved filament. When 

 an insect alights on the flower the anthers become loosened 



1 Coloration = color pattern. 



