HAMAMELIS 



289 



FIG. 129. Hamamelis. A, transverse section of a midrib from about the middle 

 of the leaf-blade, showing an arch-shaped collateral vascular bundle situated 

 near the upper or ventral epidermis and a stele with a central pith (7 1 ) 

 near the center of the section. Ep, ventral epidermis; coll, collenchyma; 

 P, palisade cells; St, stereome or sclerenchymatous fibers; H) tracheae or 

 vessels; L, leptome; T, pith; Co, calcium oxalate; A, colorless tissue; 

 D, dorsal epidermis. B, transverse section of a thin mestome strand of leaf 

 blade; Ep, ventral epidermis; Coll, collenchyma; P, palisade tissue; St, 

 stereome; PS, parenchyma sheath; N, loose mesophyll or pneumatic tissue. 

 C, transverse sections of leaf-blade; Ep, ventral epidermis; D, dorsal epi- 



