Panicum.] clvii. gramineje (Stapf). 649 
divisions of the panicle forming loosely 3-2- 
spiculate racemes, contracted on their branchlets ; 
lower floret 6 ; ligules distinctly ciliate ... ... 70. P. hygrocTiaris. 
Perennial, with readily disintegrating rhizomes ; 
panicles up to over 1 ft. long, abundantly divided ; 
ligules a very short minutely ciliolate rim or 
sometimes obscure. 
Spikelets oblong when closed, somewhat plump, 
shortly and acutely acuminate, loosely arranged 
on the long slender branches of the panicle ; 
lower floret $ ... ... ... ... ... 71. P. Swynner- 
tonii. 
Spikelets lanceolate when closed, with a slender 
acute acumen, in short 3-2-spiculate racemes 
appressed to the branchlets bearing them, these 
again contracted on their mother branches 
which assume a whip-like appearance ; lower 
floret barren, with or more often without a 
valvule 72. P. longi- W- 
jubatum. 
X. Pectinate. 
Spikelets If— 2 lin. long ; lower glume with 3-4 nerves and 
as many teeth, | the length of the spikelet ; lower y 
valve 7-nerved and minutely 3-toothed 73. P. pectinatum. 
Spikelets f-1 lin. long ; lower glume 3-nerved and 3- 
toothed, ^ the length of the spikelet ; lower valve with 
5-7 nerves and as many teeth 74. P. pectinellum. 
1 
XI. Monticol^e. 
Lower glume very much shorter than the spikelet. 
Panicle more or less flexuous to flaccid, the divisions of 
the primary branches contracted. 
Spikelets with a tuft of fine long hairs from the acute 
tip of the upper glume, 1-1 £ lin 75. P. acrotricbum. 
Spikelets glabrous, to over 1 1 lin. long ... ... 76. P. monticolum. 
Panicle ultimately stiff, widely open and loose ; spikelets 
glabrous, 1| lin. long 77. P. calvum. 
Lower glume as long or almost as long as the spikelet. 
Spikelets lanceolate, slightly oblique in profile, in 
panicles up to 6 in. long ; glumes quite equal and as 
long as the spikelet, faintly nerved : leaf-blades 
2-6 in. by 7-11 lin. ... " ... 78. P. subobliquum . 
Spikelets oblong to ovate-oblong, symmetrical in profile, 
in long-exserted widely open or sometimes con- 
tracted panicles 2-3 in. by 2 to over 3 in. ; lower 
glume about § the length of the spikelet, like the 
upper and the lower valve prominently nerved from 
the base upwards ; leaf-blades up to 3 in. by 2 lin. 79. P, Hochstetteri. 
XII. PuSILLiE. 
Annual ; culms very weak ; blades soft ; spikelets 1 lin. 
long ; lower glume f the length of the spikelet or 
almost as long ... 80. P. pusillum. 
