Fig. 60.—Transverse section of a leaf of Spinifex squarrosus. × 10
1. Vascular bundle; 2. sclerenchyma.
Fig. 61.—A portion of the transverse section of the leaf of Spinifex squarrosus. × 60
1. Sclerenchyma; 2. vascular bundle; 3. epidermis; 4. stomata.
The upper and the lower surfaces of the leaves of many grasses are more or less even, but in the case of a few grasses the upper surface consists of ridges and furrows, instead of being even. In the leaves of Panicum repens and Eragrostis Willdenoviana the upper surface is wavy and consists of shallow furrows and slightly raised ridges. But in the leaves of Aristida setacea and Panicum fluitans the furrows are deeper and the ridges are more prominent. In Aristida setacea the ridges are flat-topped and they are rounded with broad furrows in Panicum fluitans.
