52 



DEVELOPMENT OF ROSE 



[CH. 



Here we should find a series of five humps, arising 

 in a ring round the apex, and rapidly overtopping the 

 depressed apex of the dome : these five humps are the 

 young petals conjoined into a common corolla. Just 



Fig. 16. Development of the perigynous flower of a Rose. A, the 

 sepals k are in an advanced stage and are being carried up on the calyx- 

 tube ; on the inner margins of the latter are appearing the young petals 

 c and the first series of stamens a, but the convex floral axis (true apex of 

 the flower) is still devoid of carpels. B, all parts further advanced, and 

 the young carpels g are developing. C, somewhat older stage, showing the 

 inward arching of the stamens a and petals c over the carpels g. D, 

 flower nearly complete, but still in bud ; the up-growth of the rim of the 

 calyx-tube, about the line a in previous figures, is now clearly raised 

 above the nearly complete carpels g, and carries with it the insertions of 

 the stamens a, petals c and sepals A-, but it does not close over above (P). 



inside and alternating with them there follow five smaller 

 humps, which will be the five stamens. These two whorls 

 of protuberances grow up together around the rest of the 



