MORPHOLOGY OF HIGHER PLANTS. 



,Sti 



415 



FIG. 242. Cultivated strawberry (Pragaria chiMnsis): 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 sphere-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 Drown cells 

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

 grains; VII, style and stigma. After Winton. 



