FLOURS. 



39 



PLATE XVI. 



Fig. 26. Buckwheat Flour. 



a, Starch grains. 



a', Abnormal grains. 



ap, Aleurone layer. 



CO, Cotyledon. 



e, e', Outer epidermis of pericarp. 



en, Inner epidermis. 



ga, Masses of starch. 



h, Hypoderma. 



m, Middle layers of pericarp. 



t, t', Middle seed-coat. 



te, t'e', Exterior seed-coat. 



ti, Inner seed-coat. 



tr, Vessels. 



X 240.) 



