HOLE : SOME INDIAN GRASSES AND THEIR CECOLOGY. 



71 



Saccharum sponta- 

 neum (Indian form). 



Saccharum 

 arundinaoeum. 



Saccharum Munja. 



Saccharum Griffithii- 



Hairs of joint overtop Hairs of joint overtop Hairs of joint overtop Hairs of joint overtop 

 joint by 2 to 3 times joint by less than to joint by once to joint by once_ to 



length of joint 



Glume I sessile spike- 

 let coriaceous in 

 basal third. Not 

 villous dorsally. 



Glume II sessile spike- 

 let coriaceous in 

 basal third. Not 

 villous dorsally. 



Glume III of sessile 

 spikelet not villous 

 dorsally. 



Glume IV muticous 



Pale ciiiate. 



Glumes I and II pedi- 

 celled spikelet not 

 villous dorsally. 



Spikelet 1 flowered. 

 No additiona 1 

 glumes inside III 

 and IV. 



1£ times 

 length. 



joint's ! twice length of joint. 



Glume I sessile spike- Glume I sessile spike- 



let chartaceous. 



Dorsally sparsely 

 villous. Villi over- 

 topping glume by 

 about 1^ glume's 

 length. 



Glume II sessile 

 spikelet chartaceous. 

 Not villous dorsally. 



let chartaceous 

 Dorsally densely 

 villous (in basal .J — 

 f). Villi overtop- 

 ping by about 

 glume's length (1 — 

 lj glume's length). 



Glume II of 

 spikelet 

 ceous. Not 

 dorsally. 



sessile 

 charta- 

 villous 



Glume III of 

 spikelet not villous 

 dorsally. 



Mucro of glume IV 

 003-005 in. Not 

 exserted beyond 

 apex of spikelet. 



Pale ciiiate. 



Glumes I and II pedi- 

 celled spikelet dor- 

 sally villous. Villi 

 overtopping spikelet 

 by 1 — 1 i times spike- 

 let's length. 



Spikelet sometimes 

 2—3 flowered with 

 1—2 additional pale- 

 ate, hyaline, mucro- 

 nate glumes inside 

 III and IV. 



Glume III of sessile 

 spikelet not villous 

 dorsally. 



Mucro of glume IV 

 very short to 0'05 in. 

 Not exserted beyond 

 apex of spikelet. 



Pale ciiiate. 



Glumes I and II pedi- 

 celled spikelet dor- 

 sally villous. Villi 

 overtopping spikelet 

 by about spibelet's 

 length (I— 1-| length 

 of spikelet). 



Saccharum Narenga. 



Erianthus Eavennm 

 (Indian form). 



Spikelet 1 flowered. 

 No additional glumes 

 inside III aud IV. 



twice length of joint 



Glume I sessile'spike- 

 let chartaceous. 



Dorsally densely 

 villous (in basal 

 §). Villi not 



overtopping glume, 

 or overtopping by 

 less than -£ glume's 

 length. 



Glume II sessile 

 spikelet charti- 



ceons. Dorsally vil- 

 lous (in basal £ to 

 f). Villi not 



overtopping or over- 

 topping by less than 

 5 glume's length. 



Glume III of sessile 

 spikelet sometimes 

 sparsely villous dor- 

 sally. 



Mucro of glume IV 

 very short to O'OG in. 

 Not exserted beyond 

 apex of spikelet. 



Pale ciiiate. 



Glumes I and II peli- 

 celled spikelet dor- 

 sally villous (in 

 basal J to §). 

 Villi not overtop- 

 ping or overtopping 

 by less than -1- spiko- 

 let's length. 



Spikelet 1 flowered. 

 No additional glumes 

 inside III and IV. 



Hairs of joint overtop 

 joint by less than 

 joint's length. 



Glume I sessile spike- 

 let coriaceous. Vil- 

 lous or not villous 

 dorsally. Villi not 

 overtopping the 



glume. 



Glume II 

 spikelet coriaceous. 

 Villous or not vil- 

 lous dorsally. Villi 

 not overtopping the 

 glume. 



Glume III of 



spikelet not villous 

 dorsally. 



Glume IV muticous. 



Pale ciiiate. 



Glumes I and II pedi- 

 celled spikelet vil- 

 lous or not villous 

 dorsally. Villi not 

 overtopping spikelet 



Spikelet 1 flowered. 

 No additional 



glumes inside III 

 and IV. 



Hairs of joint overtop 

 joint by twico length 

 of joint. 



Glume I sessile spike- 

 let chartaceous. 

 Villous or not vil- 

 lous dorsally. Villi 

 not overtopping 

 glume or overtopping 

 by less than i glume's 

 length. 



Glume II sessile spike- 

 let chartaceous. Vil- 

 lous or not villous 

 dorsally. Villi not 

 overtopping glume 

 or overtopping by 

 les3 than j glume's 

 length. 



Glume III of sessilo 

 spikelet not villous 

 dorsally. 



Mucro of glume IV 

 01 to 0-23 in. long. 

 Clearly exserted 

 from spikelet. 



Pale glabrous. 



Glumes I and II pedi- 

 celled spikelet vil- 

 lous dorsally. Villi 

 not overtopping or 

 overtopping by less 

 than $ spikelet' s 

 length. 



Spikelet 1 flowered. 

 No additional glumes 

 inside III and IV. 



C. — Biological and GEcological Notes. 



52. The comparatively narrow, hard, glau- Habitat" 

 cous leaves of this species show marked xerophilous adaptations and although the plant 

 attains its maximum development on moist sand, it can exist in stations which are typically 

 xerophilous. 



Scattered individuals are thus often found on the shingle banks where Aristida is 

 dominant and on dry sand with the xerophilous form of S. spontaneum, but in such local- 

 ities the plants are more or less stunted and of inferior dimensions. 



f 71 1 



