Page 47 – Aerating tissues in leaves
Fig. 40 . Aerating tissues in leaves. Transverse section of the basal (i.e., non-chlorophyllaceous) region of a fully differentiated leaf to show an early stage in the formation of an aerating canal (in eross section). The intercellular spaces have arisen schisongenetically and the stellate cells of the canal are just beginning to take shape. X200.