THE FLOWER 



appear. Webb * has recently observed in Astilbe 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- 



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

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

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

 i 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 : 451-460. figs. 27. 1902. For correction of names, see 

 REHDER in Bot. Gazette 34 : 246. 1902. 



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

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



