ANDROPOGONE/E 



200 



Andropogon Schoenanthus, L. Var caesius. 



(Cymbopogon casius, Stapf.) 



This is a perennial grass with stout or slender, erect stems 

 rising from a woody base, leafy upward, simple or branched. 



The leaf-sheath is smooth and glabrous. The ligule is an oblong- 

 ovate membrane. Nodes are glabrous. 



The leaf-blade is long, narrow or broad, narrowly iinear- 

 lanceolate, finely acuminate, glaucous especially beneath, thinly 

 coriaceous, glabrous on both the surfaces, base rounded or cordate 

 and amplexicaul, 6 to 10 inches by V^ to V?, inch. 



The panicle is elongate, leafy, narrow, dense or interrupted, 

 compound or decompound, I to 2 feet long; bracts are lanceolate, 

 spathiform, finely acuminate, glabrous varying in length from I to 

 I Y 2 inches, and with hyaline margins ; the proper bracts are as long 

 as the spikes or longer. 



Fig. 164. — Andropogon Schoenanthus. 



I. A sessile and two pedicelled spikelets; 2, 3, 4 and 5 the hist, sec 

 and fourth glume of the sessile spikelet, respectively ; 6. ovary : 7, 8 ; 

 glumes of the pedicelled spikelets in order. 



ond, third 



iul 9. the 



The spikes are unequal, % to % inch long, one 3- to 4-jointed and 

 the other 4- to 6-jointed ; the joints and pedicels are narrowly 

 clavate, half as long as the sessile spikelets, tips dilated and 

 toothed, margins villously ciliate, with long hairs. 



The spikelets are binate, one sessile and the other pedicelled. 



The sessile spikelets in the upper part of the spike are bisexual, 

 lanceolate, % inch long and those in the lower part of the spike 

 are shorter, obtuse, male. The callus is short and bearded. 

 There are four glumes. The first glume is ovate or obovate-oblotiK. 

 dorsally flat or nearly so, with a deep narrow-longitudinal median 

 furrow usually below the middle and answering to a ridge on the 

 ventral face, obtuse or 2-toothed at the apex, margined above the 

 middle, with a hyaline narrow finely denticulate wing, 2-nerved 

 or nerveless. The second glume is lanceolate, cymbiform, acute or 

 acuminate, 3-nerved, margins hyaline, ciliate, as long as the first 

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