MORPHOLOGY OF HIGHER PLANTS. 



415 







FlG. 242. Cultivated strawberry (Fragaria chilo'ensis}: I, Compound fruit showing 

 fleshy receptacle bearing the achenes in deep depressions; II, isolated achene; III, achene 

 showing style (Sty), stigma (Sti) and connecting bundle (B); IV, achene in transverse 

 section, pericarp (F), testa (S),raphe (R), endosperm (E) and embryo (Em); V, receptacle 

 in surface view showing epidermis (Ep), with hair (h), and stoma (sto) ; hypoderm (hy) 

 and sphero-crystals (k) ; VI, achene in transverse section showing pericarp (F) consisting 

 of epicarp (epi), mesocarp (mes), spiral vessels (sp), crystal layer (k), outer endocarp (If) 

 with longitudinally extended fibers and inner endocarp (qf) with transversely extended 

 fibers; testa (S) consisting of epidermis (ep) with reticulated cells, elongated brown cells 

 (br), hyaline layer or nucellus (N) and endosperm (E) consisting of a single layer of aleurone 

 grains; VII, style and stigma. After Winton. 



