194 



:\I()NA(IIANTIir.S YIRIDLS. 



ClIAl'. VII. 



C. fiaccaftim. In other respects there is no important 

 difference. The antennie are of greater length ; their 

 tips for abont one-twentieth of their length are 

 roughened by cells produced into papillai. 



Fisr. 30. 



CAIASUTLM TRIDENrATlM. 



a. anther. 



pd. pedicel of pollinium. 



a«. antennas. 



/. labellum. 



A. Side view of flower in its natural 



po.sition, with two of the sepals 

 cut off. 



B. Front view of column, in position 



reverse of fisr. A. 



The pedicel of the pollinium is articulated as before 

 by a hinge to the disc ; it can move freely only in one 

 direction owing to one end of the disc being upturned, 

 and this restricted power of movement apparently 

 comes into phiy when the pollinium is carried by an 

 insect to the female flower. The disc is, as in the other 

 species, of large size, tind the end which when ejected 

 first strikes any object, is much more viscid than the 

 rest of tlto surface. This latter surface is drenched 

 with a milky fluid, which, when exposed to the air. 

 rapidly turns brown, and sets into a cheesy consistence. 

 The upper surface of the disc consists of strong mem- 



