SOME WIND-POLLINATED FLOWERS 



69 



clinous and still others are both, but in any case the flowers are all 

 clustered on the l)ranches. 



All of the conifers are wind pollinated (Figs. 26 and 27). They 

 are all diclinous and most of them are mona^eious though a few are 

 dia'cious. Pollen is produced by coniferous trees extremely abun- 

 dantly. Great clouds of pollen sometimes arise from pine forests 



Fig. 26.— Red pine (Pinus resinosa). Staminate cones. (From The Flower 

 and the Bee, by John H. Lovell; copyright, 1918, by Charles Scribner's Sons. 

 By permission of author and publisher.) 



in such a way as to appear like smoke columns. Such immense 

 numbers of pollen grains settle down on foliage, branches, grass and 

 soil that the whole landscape is given a yellowish color. Such a 

 phenomenon is often spoken of as a "sulphur shower." The pollen 

 grains of pine are so well adapted to dissemination by the wind that 



