THE
Journal of Indian Botanp,
Vol. II. OCTOBER, 1921. No. 10.
THE PHYSIOLOGICAL ANATOMY OF THE PLANTS OF THE INDIAN DESERT
BY
T. S. SABNIS, B.A., M.SC,
St. Xavier's College, Bombay.
{Continued from p. 227).
GRAMINEAE—(Contd.)
Pappophorura elegans Nees.--Figs. 351, 352. Grooves deeper on the lower surface. Margins pointed and with small stereome bundles. Hairs spiny, long and unicellular. Numerous long unicellular hairs on the axis. Stomata more numerous on the lower surface. Palisade cells forming arcs on sides of veins. Veins vertically trans-current and provided with complete bundle sheaths. Articulation tissue on the upper side of mesophyll, and extensive. Mechanical tissue in the leaf forming I-girders. Assimilatory tissue in the axis and palisade cells along smaller vascular bundles and chlorenchymatous between them. A continuous layer of sheath-cells on the inner side of the assimilatory tissue, Mechanical tissue in the axis in the form of a stereome tube supplemented by isolated sub-epidermal girders and I-girders. Webs formed by mixed small vascular bundles. Larger vascular bundles few and mostly apposed to the inner side of stereome tube. Medullary tissue of thin-walled cells.
Eragrostis interrupta Beam. — Figs. 353, 354, 355. Grooves on either surface not deep. Margins pointed and with small stereome bundles. Hairs spiny. Stomata more numerous on the upper surface. Articulation tissue in the upper half of the mesophyll. Palisade cells forming arcs on sides of veins. Veins vertically transcurrent. Smaller veins apposed to lower epidermis. Bundle-sheaths complete round smaller veins and in the form of arcs on sides of larger veins. Mechanical tissue in the leaf in the form of I-girders alternating with
