Keywords: The Oak (Marshall Ward) Fig 22.jpg en Fig 22 ”Sections across the leaf of oak A Slightly magnified and semi-diagrammatic to show the general arrangement of the principal vascular bundles as seen cut across m midrib e marginal veins; s lateral branches of midrib Other smaller veins scattered between B A highly magnified vertical section of part of the above at a place free from vascular bundles u upper epidermis with cuticle c; p palisade cells; ch chlorophyll corpuscles only drawn in a few cells; m spongy tissue of mesophyll; i s intercellular passages communicating with the stoma st in the lower epidermis l 1892 The Oak A Popular Introduction to Forest-Botany H Marshall Ward PD-old-100 The Oak Marshall Ward |