HYDROCHARITACEJE. 171 



further particulars regarding these two Himalayan pines see 

 Gamble's "Manual of Indian Timbers" and Brandis' "Forest 

 Flora of N.-W. and Central India." 



The following non-indigenous conifers are met with in gardens 

 -within the area of the Upper Gangetic Plain : 



THUYA ORIENTALIS, L. A small evergreen tree of China and Japan, 

 and sometimes known as the Chinese Arbor -Vitce. 



'CupRESSUS SEMPER, VIRENS, L. A tall evergreen tree, indigenous in 

 Persia, Syria and Asia Minor. Cypress. Vern. Sards (Hind.) 

 Largely cultivated in the plains of N.-W. India, especially the fas- 

 tigiate variety. 



JTTNTPERUS MACROPODA, Boiss. Himalayan Pencil Cedar. A small 

 or medium sized tree of the inner dry ranges of the Western Himala- 

 ya, ascending to 14,000 ft. in Ladak, and found as low down as 

 5,000 ft. on the Indus. It has been cultivated in the Saharanpur 

 Garden, where it appears to thrive. Vern. Dliup. 



ARAUCARIA CUNNINGHAMII Ait. A tall handsome evergreen tree, 

 introduced from Queensland. There used tc be a fine specimen of 

 this tree in the Saharanpur Garden. 



ARAUCARIA BIDWILLI, Hook. The Bunya-Bunya pine of N.-E. 

 Australia. This tree also thrives at Saharanpur and in other 

 gardens of North- West India. 



(Belonging to the allied and remarkable family of CycadacecB some 

 mention should be made of Gycas revoluta, Thunb., a Japanese 

 species introduced into India, and often grown in gardens within 

 the area of the Upper Gangetic Plain. It is a small palm-like 

 evergreen tree with linear pinnately divided leaves arranged in 

 terminal crowns. 



CLASS m. 



MONOCOTYLEDONS. 



CVI. HYDROCHARITACE-ffiJ. 



Aquatic usually submerged herbs. Leaves undivided, usually 

 narrow and ribbon-like, rarely with a distinct lamina. Flowers 

 regular, monoecious or dioecious, rarely - sexual, enclosed in an 



