1818 CLIII. GRAMINE-Sl. [Panicum. 



Sebieb III. Paspaloldeae.-^SjiaeZfis $eigiie or very shortly pedicellate, in 1 or 2 rows, 

 very rarely in pairs, along the short simple alternate often distant spikes or spike-like branches of 

 the panicle, rarely reduced to a single terminal spike. ! ;• •■ 



Spikes eifect, distant or single. Spikelets usually sessile. Spike single, 

 terminal. Spikelets glabrous, singly distant or the lowest in pairs. 



Fruiting glume glabrous, rugose 11. F. rarum. 



Fruiting glume densely and softly pubescent 39. P. marginatum. 



Spikes several, distant. Spikelets with long silvery-silky hairs. 



Spikelets truncate, singly distant • 12. P. argenteum. 



Spikelets ovoid, often approximate 13. P. holosericeum. 



Spikelets several, distant- Spikelets glabrous, in 2 close rows. 



Spikelets oblique, 1 to li line long in 2 close regular rows, 2nd 

 glume broad gibbous, 3rd glume flatter, with a palea in its axil . 14. P. flavidum. 



Spikelets nearly straight, 1 to IJ line long, the rows not always 

 regular and sometimes very few in the spike, 2nd and 3rd glumes 

 nearly equal, both empty 15. P. gracile. 



Spikelets obtuse, in 2 irregular rows. Outer glume nearly as long as 



others 16. P.jubUlorum. 



Spikes usually approximate, erect or at length spreading. Spikelets • 

 not so closely sessile and freqijently subtended by hairs or bristles. 



Spikelets about 1 line long, frequently in pairs. A palea in the 3rd 

 glume. Fruiting glume obtuse, rarely tipped with a minute point 17. P. prostratum,. 



Spikelets scarcely | line long, 3rd glume male or neuter, 4th glume 

 obtuse, margin's incurved 18. P. 'mutievm. 



Spikelets nearly 2 lines long, in 2 rows A broad palea in tbe 3rd 

 glume. Fruiting glume obtuse, with an awn-like point . . . . 19. P. helopus. 



Spikelets nearly 2 lines long, in 2 rows. A broad palea in the 3rd f^:" 



glume, which is ciliate with long hairs. Fruiting glume obtuse 

 with a short point 20. P. Gilesii: 



Spikelets nearly 2 lines long, in 2 rows. 3rd glume empty . Fruit- 

 ing glume obtuse.without any point. Leaves hairy . ... . i 21. P. piligerum, 

 (See also the first four species of the Paniculatte). 

 Spikes distant^, at length spreading or reflexed. Spikelets alternate 

 along the rhachis but aot close and appearing almost uniseriate. 



Leaves glabrous. Spikelets near together on a flattened rhachis . . 22, P. distachyum. 



Leaves glabrous. Spikes reflexed, the rhachis flattened, ending in 

 an awn-like point, and a rigid awn-like bristle under the lowest 

 spikelet 28. P. reversiim. 



Sebies IV. TBcllinocllloaB.— Spikelets sessile and crowded in 3 or i rows or, irregularly 

 along the simple alternate usually secund spikes or spikelet branehei of the pani<;le. Glumes 

 sometivies awned. 



Spikelets about 1 line long, never awned, densely crowded in 4 rows 

 along the rhachis, without hairs or bristles . . .' ii. P. eolonum. 



Spikelets IJ to 2 lines long, acuminate or awned, crowded aiid 

 clustered along the rhachis, usually intermixed with rigid hairs or 

 bristles . , - ' 2S. P. crut-galli. 



Sebies V. MyviroiHem.— Spikelets not silky, crowded and clustered in a dense eantinuout 

 or rarely interrupted cylindrical spikelike panicie. 



Spikelets ovoid, obtuse, i to J line long , . 26. P. myosuroides. 



Spikelets acuminate, curved. 1 to IJ line long or rather more . . . 27. p. iniicum. 

 Spikelets acuminate, 2 to 3 lines long. Fruiting glume thin . . 28. P. myurus. 



Series VI. PanloulatS> — Panicle-branches usually more or less divided. Spikelets all 

 pedicellate {except sometimes thejiret four species.) 



Panicle-branches scarcely divided. Spikelets few, rarely more numerous, 



scarcely under 3 lines long, ^o male flowers. 

 Spikelets nearly or sometimes quite sessile. (Species approaching 

 the Paipaloidice). 



Spikelets 2 to 2 J line long, mostly distant along the branches . . 29. P. foliosum. 



Spikelets rather under 2 lines, crowded on the lower part of the 

 branches in a compact panicle, 2nd ftnd Brd glumes almost 

 equal 30. P. aitpenum. 



Spikelets 1^ hne long, rather crowded on the distant br^ncbeB 

 of a long and narrow panicle. Outer glume J, 2nd J as long as 

 tlieSra • ,....,,...... ..31. P.inaqtiale. 



