410 graminEjE. [Panicum. 



Panicle without awns or bristles. 



Spikelets clustered or in short spikes along the branches . . . 11. P. nodosum. 



Spikelets not clustered, 2 lines long Ichnanthus. 



Spikelets distinct, all pedicellate, | to H lines long. 

 Leaves rather narrow, tapering or rounded at the base. 

 Stem creeping at the base, then simple and ascending. 



Panicle little branched. Outer glume short and round . 12. P. repens. 

 Stem scrambling, branched. Panicle much branched. 



Outer glume f as long as the others 13. P. sarmentosum. 



(See also Isachne australis.) 

 Leaves broad, cordate at the base. 



Leaves lauceolate, 4 to 10 in. long 14. P. montanum. 



Leaves ovate-lanceolate, 2 in. long 15. P. ovalifolium. 



Leaves ovate, £ to near 1 in. long. Spikelets minute . . Isachne pulchella. 



1. P. barbatum, Kunth, Enum. i. 84. Stems decumbent, habit and 

 foliage of P. sanguinale. Spikes 2 only, or very rarely 3, more rigid than in 

 that species, and often 3 to 5 in. long. Spikelets 1£ to 2 lines long, in pairs, 

 one sessile, the other on a pedicel as long as the spikelet. Lowest glume 

 very minute and thin, the 2 next nearly equal, both empty and prominently 

 5-, 7-, or even 9 -nerved, thickly covered with long spreading hairs in the 

 pedicellate spikelet, much less hairy in the sessile one. — P. heteranthum, Nees, 

 PI. Meyen. 174. 



In the sands of the Happy Valley, Wright ; also on the continent near Amoy, Ranee. 

 Only seen besides from the Indian Peninsula. 



2. P. sanguinale, Linn.; Kunth, Enum. i. 82. An annual with stems 

 1 to 2 ft. long, more or less spreading or creeping at the base, then ascending 

 or erect. Leaves flat, narrow, more or less hairy. Panicle consisting of 3 to 

 10 or 12 simple slender branches, 2 to 4 in. long, and all usually spreading 

 from nearly the same point so as to appear digitate. Spikelets in pairs along 

 one side of these branches, one sessile, the other pedicellate, each about 1 line 

 long. Lowest glume very minute, almost microscopic, the second concave, 

 about half the length of the third, which is nearly flat and 5 -nerved, both 

 glabrous, or more or less ciliate on the edges, and empty. 



Rice-fields, very abundant, Hance and others. One of the commonest weeds in all tropical 

 and warm regions. 



3. P. commutatum, Nees in Linncea, vii. 274. Very near the P. san- 

 guinale, of which it may be only a variety. Stems less creeping, usually 

 forming a perennial stock, with a dense tuft of the remains of old leaves, and 

 frequently woolly-hairy. Leaves narrow. Spikes slender and less spreading 

 than in P. sanguinale. Spikelets all pedicellate, the second glume but little 

 shorter than the third, the latter prominently 5 -nerved, and both usually 

 ciliate or hairy. 



On hills on the south of the island, Wilford. Occurs in various parts of India, in South 

 Africa, and in Brazil. 



4. P. distachyum, Linn. ; Kunth, Enum. i. 91. Stems decumbent or 

 creeping and rooting at the lower nodes, ascending to a foot or rather more. 

 Leaves flat, often hairy. Spikes 2 or 3, sessile, distant and alternate, in a 

 simple panicle, each one 1 to near 2 in. long. Spikelets sessile and alternate, 

 in 2 rows merging into 1, all on one side, each one \\ to 2 lines long. Outer 



