In the stem of _Eriochloa polystachya_, all the vascular bundles are more or less peripheral in position leaving a wide area of parenchymatous cells in the centre. The outline of the stem in cross section is rotund or ovate-rotund with the front side somewhat flattened and straight. The epidermal cells alone are thickened. A well developed continuous ring of sclerenchyma is present and this is connected with the epidermal layer at short intervals by means of short sclerenchymatous bands. So the parenchymatous cells of the cortex lying outside the sclerenchymatous ring are divided into small isolated areas. There are three series of vascular bundles. [Illustration: Fig. 28.--Transverse section of a portion of the stem of Eriochloa polystachya. x 70 1. Epidermis; 2. sclerenchyma; 3. vascular bundle.] One series consists of small bundles lying inside the sclerenchyma ring at the base of each of the connecting bands. The second series is made up of large vascular bundles imbedded in the ring so as to bulge out inside the ring. The vascular bundles of the third series are found just away from the ring and separated from it by a few layers of parenchymatous cells. (See figs. 27 and 28.) [Illustration: Fig. 29.--Transverse section of the stem of Setaria glauca. x 15] [Illustration: Fig. 30.--Transverse section of a portion of the stem of Setaria glauca. x 50 1. Epidermis; 2. sclerenchyma; 3. vascular bundle.] Another stem in which the vascular bundles are more or less peripheral in position and enclosing a wide parenchyma is that of _Setaria glauca_. In the transverse section of the stem the outline is ovate, laterally compressed, obtusely keeled at the back and somewhat concave in the front. The sclerenchymatous band is narrow and continuous and very close to the epidermis, being separated from it only by two or three layers of thin-walled cells. The epidermal cells alone are thickened. As to the vascular bundles there are three sets. One set of bundles lying just outside the sclerenchymatous ring consists of small ones connecting the ring with the epidermis. Just inside the sclerenchymatous ring lies a series of bundles which are connected with it. Still inside, at some distance from the sclerenchymatous band, are seen vascular bundles forming a row and enclosing a large space of the ground tissue consisting of only parenchyma. (See figs. 29 and 30.) [Illustration: Fig. 31.--Transverse section of the stem of Panicum ramosum x 24] [Illustration: Fig. 32.--Transverse section of a portion of the stem of Panicum ramosum. x 75 1. Epidermis; 2. sclerenchyma; 3. vascular bundle.] [Illustration: Fig. 33.--Transverse section of the stem of Andropogon caricosus. x 25]