Keywords: The Oak (Marshall Ward) Fig 23.jpg en Fig 23 ”A A small piece of the lower epidermis removed and highly magnified to show the stomata g; h minute hairs The guard-cells contain chlorophyll corpuscles whereas the ordinary epidermal cells do not B A stoma in vertical median section cut across its longer axis a intercellular space g guard-cell with chlorophyll corpuscles; s orifice of stoma 1892 The Oak A Popular Introduction to Forest-Botany H Marshall Ward PD-old-100 The Oak Marshall Ward |