THE 



Journal of Indian Botan-p. 



Vol. II. JUNE, 1921. Nos. 4 & 5. 



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. 73.) 





SCROPHULARIACEAE. 



Anticharis linearis Hochst— Fig. 245 (Axis only). Epi- 

 dermal cells tabular. Cuticle smooth. Guard-cells elevated. Trie- 

 homes straight and smooth-walled. Cells of the outermost layer of 

 cortex showing collenchymatous differentiation. Pericycle forming 

 a loose ring of groups of bast fibres. Wood-ring broad. Vessels small 

 and arranged in incomplete long rows. Interfascicular wood pro- 

 senchyma extensive and formed of cells with thick walls and with 

 small lumen. Medullary rays uniseriate and numerous. Pith of 

 thin-walled cells. 



Schweinfurthia sphaerocarpa Braun.— Figs. 246, 247. Epi- 

 dermal cells of the leaf and axis tabular. Large conical unicellular 

 knobbed hair-like structures intercalated amongst ordinary epidermal 

 cells. Cuticle striated. Trichomes curved and with walls covered 

 with cuticular knobs. Mesophyll bifacial. Guard-cells elevated. 

 Stomata on both the surfaces. Cells of the outermost layer of 

 cortex showing collenchymatous differentiation. Pericycle in the 

 form of isolated bast fibres. Wood-ring narrow. Vessels large and 

 arranged in complete rows. Medullary rays absent. Interfascicular 

 wood prosenchyma little developed and composed of cells with thin 

 walls and large lumen. Pith of thin-walled cells. 



Structure of the Leaf.— The epidermis in S. sphaerocarpa (fig. 246) 

 consists on both sides of tabular cells with the outer walls greatly 



CM 



