138 THE STORY OF THE PLANTS. 



like the surface of a table. An immense family 

 of plants has very small flowers arranged in such 

 an order ; they are known as umbellates, and 



FIG. 32. Clusters of flowers. I, spike of mercury, green, wind- 

 fertilised ; II, panicle of a grass (brome), green, wind-fertilised ; 

 III, head of Dutch clover, the upper flowers unvisited as yet 

 by insects ; the lower fertilised, and turning down to make 

 room for their neighbours. 



they include hemlock, fool's parsley, cow-parsnip, 

 carrot, chervil, celery, angelica, and samphire. 

 In other families the same form of cluster is seen 



