BUMBLEBEE-FLOWERS 



linated by bumblebees, are funnel-formed. The gentians bloom 

 at the close of autumn and are very abundant in the Alps, 

 where they display broad expanses of blue color. The closed 



Fig. 42. Jewel weed. Impatiens bijiora 

 A bumblebee-flower 



gentian never opens, and on a cold morning the temperature 

 within the corolla-chamber is often several degrees above that 

 of the outside atmosphere. The fringe on the edge of the co- 

 rolla of the fringed gentian prevents the ingress of small injuri- 

 ous insects. (Fig. 43.) 



83 



