432 



BOTANY 



FIG. 421. Platanus occidentalis. (After BAILEY.) 



which the parts of the flower are all separate and of equal number. In the Saxi- 

 fragacese (Ribes, Saxifraga, Philadelphus) (Fig. 420 A, E) and the Rosacese the 

 actinomorphic flowers show all gradations from strictly hypogynous forms with 

 free carpels to those with true inferior ovaries. In most of these forms the num- 

 ber of stamens is indefinite. 



3>C. 



FIG. 422. A-C, Fragaria Virginiana. D, Prunvs Cerasus. E, Spirsea sp. 

 F, G, Pyrus Mains. H, Rosa blanda, section of the flower-bud, enlarged, showing 

 the numerous free carpels enclosed in the urn-shaped receptacle. 



