LYCOPERSICUM ESCULENTUM 



569 



- r / w \ 



G 



o 



■end 



Fig. 197. A, longisection through mature seed showing position of embryo; B, tran- 

 section of outer layer of mature seed coat showing sinuous walls and character of thickening ; 

 C-G, successive stages in development of seed coat showing resorption of outer and inner 

 zones, and development of wall thickenings of outer layer which form hairs : cot, cotyledons ; 

 end, endosperm ; hr, hairs or longitudinal bands produced from outer layer of seed coat ; 

 hy^, hypocotyl ; i /, inner layer of seed coat ; i 1, inner zone of parenchyma ; / h, thickened 

 longitudinal bands of wall ; w /, membranous layer of mature seed coat ; I, outer layer of 

 seed coat; z, outer zone of parenchyma; s c, seed coat. QB-G redrawn after Soueges, 

 Ann. ScL Nat.^ 



