VII] 



PERIGYNY 



59 



In a large number of other cases, however, as in the 

 Strawberry, Cherry, Potentilla, Willow-herb, many Saxi- 

 frages, &c., the stamens and petals cannot be traced to any 



Fig. 18. Vertical sections of hypogynous, perigynous and epigynous 

 flowers. A, Barberry, showing trie hypogynous stamens, petals and sepals, 

 all free and separately inserted on the floral receptacle beneath the ovary. 

 .B, Spindle Tree, showing the perigynous insertion of the stamens and 

 petals on the base of the calyx outside the disc, and thus carried away 

 from the floral axis proper. (7, Rhamnus, showing perigyny even more 

 pronounced ; the stamens and petals are carried up on the throat of a 

 cup-like calyx-tube. D, Pear, showing the epigynous stamens, petals and 

 sepals, the insertions of which are not only carried up to a level above 

 that of the ovary, but the calyx-tube closes over and roofs in the latter 

 (Wo and E and P). 



distinct and separate insertions on the receptacle itself 

 below the gyncecium : they are inserted in a circle, or 

 circles, on the rim of a sort of saucer-like or cup-shaped 

 expansion, which is due to lateral up-growth of the 



