Fig. 35.—Transverse section of a portion of the stem of Panicum Isachne. × 100
1. Epidermis; 2. sclerenchyma; 3. vascular bundle.
The stem of the grass Andropogon caricosus is oval in outline, the front being flat. The epidermal cells and those below and in contact with them are thick-walled. The sclerenchymatous ring though present is very narrow and not very conspicuous. It consists of one or two layers of cells connecting a few vascular bundles forming the outermost set. There is a series of vascular bundles inside the ring which surrounds a large area of the ground tissue. Two isolated bundles, one in front and another at the back of the ground tissue, are found. The cells of the ground tissue lying just inside the vascular bundles are all very much thickened. (See figs. 33 and 34.)
Fig. 36.—Transverse section of the stem of Eragrostis interrupta. × 25
Fig. 37.—Transverse section of the stem of Panicum flavidum. × 15