I LOR A OF THE INDIAN DESERT. 47 



The general element can be neglected for our purpose, as it consists of 

 species which are either only Indian or show a wider distribution over the 

 Eastern and Western parts of the Old World, or comprise even certain 

 regions of the whole globe. 



What is left to form an estimate of the plant-geographical position of 

 the flora is the western element with 189 species, and the eastern (here 

 Indo-Malayan) element with 27 species. The eastern forms just 1/7 of the 

 western. These numbers indicate that the Indo-Malayan and western 

 botanical regions meet in the Western Rajputana desert. The ecological 

 conditions of the country are not such as to exclude Indo-Malayan 

 types entirely, but the western element is preponderant. This proves 

 that Drude was correct, when he drew the line of demarcation between 

 the Indo-Malayan flora and the Perso-Arabiau region from the Gulf of 

 Cambay northwards along the Aravallis. 



We have said that there are 17 endemic species. We mention their 

 names, as they are new to systematic botany : 



Farsetia macrantha, Blatt. and Hall. (Cruciferce). 

 Melhania magnifolia, Blatt. and Hall, {t^terculiaceoe) . 

 Zizyphus truncata, Blatt. and Hall. (Rhamnucece) . 

 Psoralia odorata, Blatt. and Hall. (Leguminosce). 

 Tephrosia multifiora, Blatt. and Hall. ( ?> ) 



Tephrosia petrosa, Blatt. and Hall. { }> ) 



lihj-nchosia rhombifolia, Blatt. and Hall. ( ,, ) 



Rhynchosia arenaria, Blatt. and Hall. ( >> ) 



Anogeissus rotundifolia, Blatt. and Hall. (CombretacecB). 

 Ammannia desertorum, Blatt. and Hall, (Lythraceoe). 

 Pulicaria rajputantB, Blatt. and Hall. (Compositce). 

 Glossocardia setosa, Blatt. and Hall. ( ,, ) 



Convolvulus densiflorus, Blatt. and Hall. (Convohulacece). 

 Convolvulus gracilis, Blatt. and Hall. ( •> ) 



>ai!rua pseudo-tomentosa, Blatt. and Hall. {Amurantaceoe). 

 Euphorbia jodhpurensis, Blatt. and Hall. (Euphorbiacece). 

 It is very likely that a better knowledge of the Cutch, Sind and Balu- 

 chistan floras will reduce the number of endemic species. 



(To be continued.') 



