224 THE JOURNAL OF INDIAN BOTANY. 



Latipes senegalensis Euntli. — Uig. 325. Deeply grooved on 

 the upper surface. Margins pointed and with small stereome bundles. 

 Hairs spiDy and absent on the axes. Stomata more numerous on the 

 upper surface. Articulation tissue in the upper portion of the meso- 

 phyll. Veins provided with horse-shoe shaped sheaths incomplete 

 below. Veins vertically transcurrent. Mechanical tissue in the leaf 

 in the form of I-girders. Assimilatory tissue absent in the axis. 

 Mechanical tissue in the form of subepidermal stereome tube. Small 

 bundles embedded in stereome tube. Large bundles few in the 

 medullary tissue. Medullary tissue of very thick-walled cells filled 

 with granular contents. 



Elionurus Royleanus Nees.— Figs. 326, 327. Epidermal cells 

 on the upper surface vertically elongated and papillose. Surface not 

 grooved. Hairs unicellular, long and only on the upper surface. 

 Margins blunt and with small stereome bundles. Epidermal cells 

 forming articulation cells. Epidermal cells on the lower surface tabu- 

 lar and with angular thickenings on outer walls. Stomata only on 

 the upper surface. Palisade cells forming complete girders round 

 smaller veins. 'Veins provided with sheaths. Upper cells of sheaths 

 of vertically transcurrent veins forming aqueous cells. Larger veins 

 apposed to epidermis above and vertically transcurrent below by 

 stereome. Mechanical tissue in the leaf in the form of isolated sub- 

 epidermal girders on the lower side of some of the larger veins. 

 Assimilatory tissue absent in the axis. Mechanical tissue in the axis 

 forming a sub-epidermal stereome tube. Smaller bundles embedded in 

 stereome tube. Larger bundles few in medullary tissue. Medullary 

 tissue of thin-walled cells. 



Elionurus hirsutUS Man.— Figs. 328, 329, 330. Deeply groov- 

 ed on the upper surface. Lower surface furrowed below the larger 

 veins. Margins pointed and with large stereome bundles. Hairs 

 spiny, long and unicellular. Stomata more numerous on the lower 

 surface. Articulation tissue extending between two surfaces near the 

 margin and forming extensive tissue between the upper epidermis and 

 veins towards the margin. Palisade cells forming complete girders 

 round non-transcurrent smaller veins. Larger veins alternating with 

 smaller ones and situated in a higher plane. Larger veins near the 

 margin vertically transcurrent. Mechanical tissue in the leaf in the 

 form of I-girders towards the margin, of isolated sub-epidermal girders 

 on the lower surface and of stereome-ring iDside the sheath round 

 non-transcurrant smaller veins. Assimilatory tissue in the axis form- 

 ing a continuous ring of chlorenchyma. Smaller bundles with com- 

 plete sheaths and embedded in assimilatory tissue. Of the larger 

 bundles the peripheral ones embedded in stereome tube and inner 



