50 



es the flower in quest of nectar, which is secreted as in other 

 Leguminosae, it pushes forward into the space under the 

 arched keel, and by lifting from underneath dislodges its 

 apex; when first the stigma and then the anthers are brought 

 against some portion of the insect's b')dy and against the 

 same portion in succeeding blossoms, thus efi"ecting cross- 

 pollination. 



Red Clover. Trifolium pratense. The corolla consists 

 of the following parts: An upper larger petal known 

 as the standard, two lateral petals known as the 



FIG. 22. 

 Fig. 22. Ked clover {TrifoUum pratetiae). 1, Flower from beli/W ; 2, from above 

 after the removal of the standard; 3, the kee/ forced apart; 4 and 5, wing pe- 

 tals. 6, stamens and pistil emerging from keel; a, calyx, b, tube formed by the 

 union of filaments; d, the concave inner partof the wings; h. keel; i. style; 

 m. anthers. (After Hermann Mueller.) 



wings, and two lower petals resembling the keel of a boat, 

 which are united and are commonly known as the keel. The 

 ,keel contains the ten stamens, each stamen consisting of an 



