THE FLOWER 



19 



appear. Webb * has recently observed in Astilhe that the 

 order of succession of floral cycles is sepals, inner stamens, car- 

 pels, outer stamens, and petals. In this case there is an acro- 



Fio. 4. — Capsella Bursa-pastoris. Floral development: A, floral axis before appearance 

 of floral organs ; B, appearance of sepals ; 6', appearance of stamens ; carpels barely 

 distinguishable ; Z>, appearance of petals : 5, sepals ; m, stamens ; c, carpels ; p, petals 

 x 130. 



petal succession of certain cycles, followed by a basipetal succes- 

 sion of the remaining ones. The remarkable case of the flower 

 of the Primulaceae, noted by Pfeffer,f is also familiar, in 



* Webb, J. E. A Morphological Study of the Flower and Embryo of Spi- 

 raea. Bot. Gazette 33 : 451^60. figs. 37. 1902. For correction of names, see 

 Reader in Bot. Gazette 34 : 246. 1902. 



f Pfeffer, W. Zur Bliithenentwicklung der Primulaceen und Ampelideen. 

 Jahrb. Wiss. Bot. 8: 194-215. 1872. 



