SEEDS. 



117 



PLATE XLIX. 



FIG. 59. Powdered Cacao Seeds (x240). 



a, Starch grains 



ae, Outer layer of endosperm. 



ai, Inner layer of endosperm. 



al, Aleurone grains. 



co, Cotyledon. 



cp, Pigment cells containing cocoa-red. 



cr, Crystals of fat. 



ec, Epidermis of cotyledon, surface view. 



e'c', Epidermis of cotyledon, profile. 



end, Inner epidermis of pericarp. 



gr, Crystals of fat. 



I, Bast from fibro-vascular bundles. 



ox, Calcium oxalate crystals. 



p, Pluricellular hairs. 



pa, pi, Parenchyma of seed-coat. 



pa, Cells of radicle. 



sc, Sclerenchymatous layer of seed- coat, surface view. 



B'C', Sclerenchymatous layer of seed-coat, in profile. 



te, Outer epidermis of seed-coat to which the inner epidermis of the 



pericarp (end) is adhering. 

 ti, Inner epidermis of seed-coat. 

 tr, v, Vessels, etc., from fibro-vascular bundle. 



