BY WIND AND INSECTS. 



Again, as Mr. Darwin has pointed out, irregular 

 flowers appear to be almost always fertilised by 

 insects. 



Wind-fertilised flowers, moreover, generally have 

 the stigma more or less branched or hairy, which 

 evidently tends to increase its chance of catching the 

 pollen. 



Figs. I to 6, taken from Axell's work, illustrate 



F.u. A. Fig. 5. I'lu. 6. 



Fig. I. Stigma of the Alder. Fig. 2. — Of the Hop. Fig 3-— Of the Wheat ; which 

 are anemophilous. Fig. 4,— Of the Willow. Fig. 5.— Of the Flax. Fig. 6.— Of 

 Nuphar ; which are entomophilous. 



this difference. In the alder (Fig. i), the hop (Fig. 2), 

 and wheat (Fig. 3), the pollen is wind-borne, whence 

 they have been termed by Delpino " anemophilous ; " 

 while in the willow (Fig. 4), the flax (Fig. 5), and 

 nuphar, (the yellow water lily) (Fig. 6), it is carried 

 by insects, whence such plants have been termed 

 " entomophilous!' 



