102 



eaten by the insect visitors. No other signs of nectar are to 

 be seen." 



"Sometimes one will fine a dead bumble bee in the Moc- 

 casin flower. It has gone in through the large opening of 

 the iabellum, lias been unable to escape the way it came, and 

 crawling upward, becomes imprisoned beneath the stigma, 

 where it finally dies." 



Greater Green Orchis {Hahenaria orhiculata). — Dr. 

 Gray gives the following account of the pollination in this 

 si)ecies: The three external parts of the perianth, the sepals, 

 are -much broader than the three internal, the petals. The 



FIG. 41. 



Fig. 41. Hawk moth iSv^vnix drwpiferarum) v/itii twopollinia, one attached 



to each eye from HaboimicKoMctJiata, as it comes from the flower. The long 



tougue partially uncoiled . The figure to the right shows the deflexed pollinia 



and the coiled tongue in the center. (AfterGray.) 



base of the long and narrow petal is turned downward and 

 hollowed out into a long tube, which is closed at the bottom 

 and open at the top. This is the spur or nectary, and con- 

 tains the nectar which is secreted in it. The single anther 

 and stigma are united and lie just beyond the opening of the 

 nectary. The anther cells open by a long chink, approach- 



