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Wy ON 
YL a) 
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v 
Fig. 36.—Viola calearata, L. 
A.—Front view of flower, from Piz Umbrail, nat, size. z 
B.— Ditto, lateral view (July 16, 1875). 
C.—Front view of flower, from Albula, nat. size. 
D —Lip of ditto. with its spur (August 2, 1876), ; 
E —Front view of the mouth in A (x 84). ‘ 
F.—Section of A, after removal of the greater part of the corolla (x 84). | 
a. anthers; c¢, rf ae of the connectives ; h’, pollen-collecting hairs; h?, hairs which in 
species of Viola fertilised by hees aid the bee in clinging to the flower, here preserved as a function- —_ 
less hereditary character ; k, stigma; J, lip on the under side of the entrance to the cavity of the 
stigma (st); sd, honey receptacle ; si, filaments ; ov, ovary. 
