42 THE JOUENAL OF INDIAN BOTANY. 



are not found in either of the species. Veins are embedded and are 

 provided with sheaths of thickened green cells. The bundles are 

 accompanied by arcs of collenchyma on the lower side, protecting 

 the phloem of the veins. Hairy covering on the leaf and axis con- 

 sists of densely placed clothing hairs. The hairs are unicellular, two- 

 armed with their thin walls bearing knobs incurstated w :i "h carbonate 

 of lime, fig. 4. The hairs are appressed, filled with air and white ; 

 and protect the plants from insolation by reflecting the rays of light. 

 Glandular hairs do not occur in either of the species. 



Structure of the axis. 



Epidermis is composed mostly of vertically tabular cells with 

 outer and inner walls greatly thickened and-cuticluarised, much more 

 so in F. macrantha. Lateral walls are thin and undulate. 



Primary cortex is characterised by assimilatory tissue composed 

 of short palisade cells in F. jacquemontii (fig. 6) and of palisade tissue 

 on the outer side and chlorencyma on the inner side in F. macrantha 

 (fig. 8). Sclerencymatous pericycle is represented in F. jacquemontii 

 (fig. 6) by a few scattered bast fibres, and in F. macrantha by numer- 

 ous closely placed groups of bast fibres, (fig. 8.) The wood in F. 

 jacquemontii (fig. 6) is quite composite and has vessels uniformly 

 distributed in incomplete rows, the vessels being more numerous and 

 larger in the lower half. In F. macrantha (fig. 8) the vascular ring 

 is undulate and is composed of very small xylem bundles connected 

 by narrow strands of interfascicular wood prosenchyma formed of 

 thick walled cells having small lumina. There are large groups of 

 wood parenchyma enclosing the lower portions of the xylem bundles- 

 Medullary rays do not occur in either of the species. 



The pith is composed of thin-walled cells. 



Capparidaceae. 



Cleome papillosa Steud. Figs. 10, 11, 12, 17, 18. Herbaceous. 

 Epidermal cells with outer walls strongly papillose. Guard cells in 

 the plane of the surrounding cells. Mesopbyll composed of palisade 

 tissue on the adaxial side and of arm-palisade tissue on the abaxial 

 side. Veins not provided with bundle sheaths. Internal glands 

 absent. Glandular hairs multicellular and capitate. Outer walls of 

 the epidermal cells of the axis superficially granulated. Assimilatory 

 tissue in the axis formed of chlorophyll containing parenchyma. 

 Pericycle consisting of long, thin groups of stone cells. Wood 

 composite. Soft bast occuring in groups. Pith formed of thick- 

 walled cells. 



{To be continued.) 



