64 



INDIAN FOREST MEMOIRS. 



Glume II. 



Glume III. 



Glume IV. 



Pale. 



Pedicelled 

 Spikelet. 



Lodioules. 



Anthers. 



Stigmas. 



Field 

 Characters. 



Anatomy. 



Scabrid dorsally on keels. 



Margin infiexed, sparsely ciliate above. 



Apex minutely bi-dentate to entire. 



Subequal to I. Lanceolate, chartaceous, keeled. With one strong central nerve and 

 usually 2 4 more or less distinct, but fainter, additional nerves. 



Glabrous dorsally or minutely pubescent towards apex, scabrid dorsally on keel — 

 margins incurved, ciliate above. 



Apex usually shortly mucronate. 



Oblong-lanceolate, hyaline-membranous, a little shorter than II, 1 — 3 nerved. 



Margins incurved, ciliate. 



Apex acute or short mucronate. 



Broad lanceolate to elliptic. Shorter than or subequal II. 



Hyaline, 1 — 3 nerved. Mucronate. Ciliate. 



Mucro short to 0-05 in. long, but not exserted beyond the apex of the spikelet. 



Ovate, hyaline, ciliate, from ^ to f IV. 



Similar, but glumes I and II are both dorsally long villous and usually with 3 — 5 

 strong nerves and occasionally two additional fainter nerves. 



Two, cuneate, glabrous, 0-02 in. long. 



Three, pale yellow to purple, 0-08 to 0-10 in. long. 



Yellow, often tinted with purple, 0-04 in. to 0-06 in. long. 



The glaucous narrow leaves, awnless spikelets and smooth leaf -sheaths at once distin- 

 guish this species from Erianthus Ravennm, with which it is sometimes confused in the 

 field. 



The striking contrast, as regards colour, afforded by the glaucous leaves of S. Munja 

 and the dark green leaves of S. Narenga, suggested that there might be considerable ana- 

 tomical differences in the leaves of these species. Examination, however, showed that 

 there were no anatomical differences which would account for this contrast, the glaucous 

 colour of the leaves of S. Munja being due to a superficial waxy deposit which is especially 

 copious on the under-surface. The general structure of the leaf and the disposition of the 

 chlorenchyma in these two species is similar and resembles that of Imyerata described 

 below. Tbfe chlorenchyma is arranged in more or less complete rings around the vascular 

 bundles and is mainly disposed near the lower epidermis, the chlorenchyma strips flanking 

 the larger nerves, alone, reaching the upper epidermis, while a band, 4 — 6 cells wide, of 

 colourless bulliform cells is situated over the smaller nerves and the chlorenchyma which 

 surrounds them. 



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