THE FLOWER AND THE BEE 



catchfly (S. nutans). Exotic moth-flowers are also common in 

 the nightshade family, as several cultivated species of tobacco, 



the long-flowered to- 

 bacco (Nicotiana longi- 

 flora), which has a green 

 tube 4 inches long, and 

 the similarly flowered 

 night-blooming tobacco 

 (N. noctiflora, Fig. 7-4a), 

 and the white flowers 

 of the Jamestown weed, 

 which are 3 inches long. 

 Two species of lilies are 

 pollinated by hawk- 

 moths, as Lilium candi- 

 dum and L. Martagon, 

 as are also several spe- 

 cies of gentians (Gen- 

 tiana verna and G. 

 bavarica), the vernal 

 crocus (Crocus vermis), 

 several kinds of the 

 sweet-scented Ga rden ia 

 and a number of or- 

 chids in the genus II a- 

 benaria. (Fig. 75.) 



Several years ago at 

 Cambridge, Mass., I 

 saw in bloom that re- 

 markable orchid from 

 Madagascar, Angrcscum sesquipedale, which bears large, snow- 

 white flowers with a slender green nectary of the astonishing 



I5i 



Fig. 73. Racemed Catchfly, 

 dichotoma 



Silene 



