2o8 



BEES AND BEE-KEEPING. 



showing five anthers (a, B), nearly closing the mouth. 

 Upon splitting these two forms, the first will present 

 an enlargement in the centre of the corolla tube, 

 and here the anthers (a, A) take their position. The 

 second has an enlargement at the top, where the 

 anthers (a', B) are placed, while the centre of the 

 tube is destitute of any widening, but contains the 

 greenish stigma (/). It is clear that, if a bee, 

 probably a Humble, visits the first blossom (A), the 



Fig. 61.— Cross Sections of Dimorphic Flower (Primula vulgaris, 

 Common Primrose), Order Primulacece. 



A, Long-styled Flower— s, Stigma ; st, Style ; a, Anther ; o, Ovary ; pg, Pollen 

 Grains, more Magnified. B, Short-styled Form — a', Anther ; s', Stigma ; 

 stf, Style ; o', Ovary ; pg', Pollen Grains, more Magnified. 



long tongue, fully outstretched to get at the nectar, 

 will be coated with pollen upon the centre of its 

 length ; and should the bee now pass to the second 

 form, the carried pollen will be in the correct posi- 

 tion for fertilising the flower, while the tongue will 

 get coated at the root, for subsequently pollinating 

 the first form. Darwin, in a series of admirable ex- 

 periments, proved that, although seed might be pro- 

 duced artificially in the plant under consideration, by 



