272 THE JOURNAL OF INDIAN BOTANY. 



isolated sub-epiderinal girders on the upper side. Assimilatory tissue 

 of arcs of palisade cells on the outer side of smaller vascular 

 bundles and chlorenchyrnatous between them. Mechanical tissue 

 farming a stereome tube supplemented by isolated sub-epidermal 

 girders and I-girders. Webs formed by strips of stereome bundles. 

 Smaller vascular bundles with arcs of palisade cells and of sheath- 

 cells on the leptome side and with the hadrome portion embedded in 

 stereome tube. Larger bundles numerous in the medullary tissue. 

 Medullary tissue formed of thin-walled cells. 



Eragrostis pilosa Beauv. — Fig. 356. Grooves not deep, Margins 

 pointed and with small stereome bundles. Hairs spiny and more 

 numerous on the lower surface. Stomata only on the lower side. 

 Articulation tissue confined to the plane of epidermis and formed of 

 long horizontal strands. Palisade tissue forming arcs on sides of veins. 

 Veins vertically transcurrent. Bundle-sheaths complete round smaller 

 veins. Mechanical tissue in the leaf forming I-girders and in the 

 axis forming stereome tube supplemented by isolated sub-epidermal 

 girders. Assimilatory tissue in the axis chlorenchyrnatous. Smaller 

 vascular bundles embedded in stereome tube. Larger bundles in the 

 medullary tissue, few and enclosed in rings of stereome. Medullary 

 tissue of thick-walled cells towards the periphery and of thin-walled 

 cells towards the centre. 



Desmostachya bispinata Stapf.— (Eragrostis cynosu- 

 roides Beauv.) — Figs. 357, 358. Grooves not deep. Hair3 spiny. 

 Stomata more numerous on the upper surface. Articulation tissue 

 extending between two surfaces. Palisade tissue forming arcs on 

 sides of veins. Veins with arcs of complete girders of sheath-cells. 

 Veins vertically transcurrent. Mechanical tissue in the leaf forming 

 I-girders and in the axis forming isolated sub-epidermal girders alter- 

 nating with I-girders. Assimilatory tissue chlorenchyrnatous. Larger 

 vascular bundles with arcs of stereome on the outer side. Medullary 

 tissue of thin-walled cells. 



Oropetium Thomaeum Trin — Fig. 359.— Grooves deep and 

 alternating on two surfaces. Margins pointed and with small stereo- 

 me bundles. Clothing hairs unicellular. Club-shaped glandular 

 hairs on the upper surface. Stomata more numerous on lower sur- 

 face. Articulation tissue in the upper half of mesophyll and not 

 extensive. Bundle-sheaths horse-shoe shaped and incomplete on the 

 lower side. Palisade tissue forming arcs on sides of veins. Veins 

 apposed to lower epidermis and vertically transcurrent above by 

 stereome bundles. Mechanical tissue in the leaf forming isolated sub- 

 epidermal girders on the upper side above the veins. 



