THE 



Sournal of Indian Botanp, 



Vol. II. JANUARY, 1921. Nos. 1 & 2. 



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 Vol, 7, £>. 287.) 



COMPOSITAE 



Vernonia cinerascens SchulL— Figs. 163, 164, 165, 166. Woody. 

 Mesophyll isobilateral. Stomata depressed. Clothing hairs two-armed. 

 Glandular hairs consisting of a spherical head and of a stalk-cell or of 

 a short stalk. Collenchyma not developed in cortex. Wood com- 

 posite. Medullary rays 1-3 seriate. Pith formed of lignified cells. 



Pegolettia senegalensis Cass.— Figs. 167, 168, 169, 170. 

 Herbaceous. Mesophyll composed of arm-palisade cells. Clothing 

 J hairs absent. Glandular hairs depressed, biseriate and spherical. 

 I Stomata elevated or depressed. Bundles of acicular crystals found near 

 j veins, in cortex and in pith. Collonchyma not doveloped in cortex. 

 Wood composite. Medullary rays uniseriate. Endodermis formed of 

 V, thin-walled cells. Pith consisting of thin-walled cells. 



Pulicaria angustifolia DC— Figs. 171, 172. Herbaceous. 



I Stomata elevated. Mesophyll consisting of arm-palisade cells. Clothing 



hairs in the form of flagellum trichomes. Glandular hairs depressed, 



biseriate and spherical. Collenchyma subepidermal. Wood composite 



L and deeply lobed on the inner side. Pith formed of thin-walled calls. 



Pulicaria rajputanae Blatt. and Hall— Figs. 173, 174, 175, 176, 



177. Woody. Stomata depressed. Mesophyll isobilateral. Secretory 



