LEAVES. 



69 



PLATE XXVIII. 



e.z. 



FIG. 38. Powdered Henbane Leaves (x 240). 



ccr, Crystal cells. 



cr, Crystals of calcium oxalate. 



ei, Lower epidermis. 



es, Upper epidermis. 



ffv, Portion of fibrovascular bundle of midrib. 



ip, Scar of fallen hair. 



m, Spongy parenchyma. 



pa, p'a', Palisade cells. 



pg, Glandular hairs. 



pt, Simple hairs. 



st, Stomata. 



tf, Cortical parenchyma of midrib, 



~tn Tracheids and vessels. 



