BUTTERFLY-FLOWERS 



stigma. The anthers are covered all around with pollen and 

 are versatile, that is, they are attached by a middle point and 

 when touched oscillate easily up and down like the walking- 

 beam of an engine. In the bee-lily the anthers are fixed in 



Fig. 61. Canada Lily. Lilium canadense 

 A bee-lily 



one position. A third species of lily (Z. Martagon) is adapted 

 to hawk-moths. 



Lepidopterid, or butterfly and moth flowers, are not numer- 

 ous, and in the whole Alpine flora Mueller found but 33. 

 Besides the pinks and Hlies already mentioned, several red- 

 flowered species of Phlox (Fig. 63), a crimson heath {Erica 



131 



