158 ENTOMOPHILY [CH. 



By far the larger proportion of the true, gaily coloured 

 flowering plants, however, are pollinated by the agency 

 of insects, and here again we can recognise amidst the 

 endless diversity in details a number of features in 

 common shown by these entomophilous plants. 



Typically the flowers are large and conspicuously 

 coloured, not numerous and crowded, and emit charac- 

 teristic odours, and secrete honey, all of which characters 

 combine to render them attractive to insects, the hairy 

 bodies of which become dusted with the pollen-grains 

 often viscid and provided with special outgrowths to 

 promote adherence and carry them from flower to 

 flower. 



It is a remarkable fact, however, that entomophilous 

 flowers, and particularly those especially adapted for the 

 visits of insects, are usually hermaphrodite or pseudo- 

 hermaphrodite, and not diclinous and on separate plants, 

 though many of them exhibit intermediate conditions 

 which suggest that the sexes are becoming separate. 



In the following the flowers are pollinated by insects 

 (entomophily) : 



Willows Vaccinium Rubus 



Mistletoe Rhododendron Almond 



Barberry Arbutus Cotoneaster 



Maples Ling Elder 



Gorse Bittersweet Lonicera 



Broom Fig Erica 



Laburnum Clematis Azalea 



Pyrus Mahonia Bearberry 



Rosa Lime Lilac 



Hawthorn Whin Privet 



Ribes Robinia Daphne 



Viburnum Primus. 



In hermaphrodite (monoclinous) flowers there are 



