LI*S?A*Y 



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.--Yigs. 351, 352. Grooves deeper 

 on the lower surface. Margins pointed and with small stereome 

 bundles. Hairs spiny, long and unicellular. Numerous long unicellu- 

 lar 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. Mech- 

 anical tissue in the leaf in the form of I-girders alternating with 



