ALDER BUCKTHORN 



307 



t Flowers small, greenish and inconspicuous ; [For (ft) 

 not Rosaceous. Sepals, petals and stamens see P' 309.] 

 equal in number ; ovary syncarpous. 

 Sepals, petals and stamens 5 each: the petals 

 very minute, on the inner margins of the 

 cup-like calyx-tube, each with a small stamen 

 opposite its base. 



Rhamnus Frangula, L. Alder Buckthorn (Fig. 122). 

 Small tree. 



Flowers hermaphrodite, whitish, in axillary cymose 

 tufts, or paired, or single. Protandrous, with exposed honey. 

 Stamens and petals 5 each. Pollen small, about 30 x 20 /JL, 

 white, smooth, rounded tetrahedral to ellipsoid with 



Fig. 122. Alder Buckthorn, Rhamnus Frangula. 1, flowering shoot; 

 2, flower; 3, the same in vertical section; 4, fruit; 5, seed. 2 and 3, 

 enlarged, p. 307 (Wo). 



202 



