250 



Ixora sp. 

 Tamarix sp, 

 Pongamia glabra. ' 

 Trewia nudiflora. 

 Terminalia Arjuna. 

 Ficus hispida. 

 F. glomerata. 

 Homonoia sp. 

 Salix tetrasperma. 



As indicating that the plants in these forests often find it 

 difficult to obtain their necessary supply of moisture, it is 

 noticeable that Anogeissus acuminata and Eugenia Heyneana, 

 which are common riparian species, are characterized by being 

 small-leaved species of their respective genera, small leaves 

 being as a rule very characteristic of xerophytes, while several 

 plants which occur in riparian tracts are also often found in 

 very dry localities, e.g. 



Anogeissus acuminata (occasionally), 



Vitex Ne^undo, 



Streblus asper, 



Acacia Catechu, 



Balanites Roxburghii, 



Capparis aphylla, 

 and others. 



An interesting and perhaps one of the most widely distri- 

 buted plant characteristic of dry river-beds is Rhabdia lycioides, 

 with its minute leaves and creeping, rooting branches which 

 enable it to withstand successfully the action of violent 

 floods. 



Distribution 226. The distribution of all im- 



of important portant Indian trees, so far as it is at present known, is given 



Species ^ n detail in Brandis' Indian Trees and in Gamble's Manual 



of Indian Timbers and will not be repeated here. The 



approximate 'limits of the distribution of Teak, Sal, Deodar, 



Sandal, Red Sanders and Caoutchouc have, however, been 



indicated in the map, Plate XXIII. 



The principal factors responsible for the distribution of the 

 chief types of forest have been given above, and in a few cases 

 the factors which appear to have a considerable influence 

 on the distribution of individual species have been incidentally 

 mentioned. In the present state of our knowledge it is impos- 

 sible to indicate, with any degree of certainty, the factors which 

 determine the distribution of many of our important species. 



