THE FLORA OF THE NOETHBEN TEEEITOEY. 35 



Branches of the panicle few, digitate or clustered at the end of the peduncle. 

 Branches 3 to 8. Spikelets of each pair similar, both fertile, glabrous 



or softly ciliate. — 30. P. sanguinale. 

 Branches usually 2. Spikelets of each pair dissimilar. — 7. P. cten- 

 anthum. 

 Branches of the panicle scattered or the upper ones approximate, the lower 

 ones rarely clustered and not verticiUate. 



Branches usually 2 or 3, distant, 1 to 1| in. long. — 33. P. steno- 



stachyum. 

 Branches often numerous, 2 to 6 in. long. — 23, P. parviflorum. 



Series II. Trichachneoe. — Spikelets silky-hairy, or fringed with long 

 hairs, sessile or shortly pedicellate, clustered or rarely in pairs along the rachis 

 of the simple spike-Uke panicle or of the two or few long erect branches. 



Spike single. Spikelets mostly in pairs, about 1 hne long, silky hairy, 

 the outer glume deficient. — 12. P. gibbosum. 



Spike-like branches few or spike single. -Spikelets mostly clustered, 

 1 to 1| lines long, the outer glume present but small and often concealed by the 

 long silky hairs. — 18. P. leucophceum. 



Spike-hke branches few. Spikelet 2 to 2^ Knes long, fringed with long 

 hairs connected by a prominent nerve or membrane. Glumes with fine points. 

 — 31. P. semialatum. 



Series III. PaspaloidecB. — Spikelets sessile or very shortly pedicellate, 

 in one or two 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 erect, distant or single. Spikelets usually sessile. 



Spike single, terminal. Spikelets glabrous, singly distant or the 



lowest in pairs. — 28. P. rarum. 

 Spikes several distant. Spikelets with long silvery hairs. 

 Spikelets truncate, singly distant. — 2. P. argenteum. 

 Spikelets ovoid, often approximate. — 16. P. holosericeum. 

 Spikes several distant. Spikelets glabrous in two close rows. 



Spikelets oblique, 1 to IJ lines long in two close regular rows, 

 second glume broad gibbous, third glume flatter, with a 

 palea in its axil. — 10. P. flavidum. 

 Spikelets nearly straight, 1 to 1-| lines long, the rows not always 

 regular and sometimes very few in the spike, second and 

 third glumes nearly equal ; both empty. — 14. P. gracUe. 



Spikes usually approximate, erect or at length spreading. Spikelets not 

 so closely sessile and frequently subtended by hairs or bristles. 



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

 glume. Fruiting glume obtuse, rarely tipped with a minute 

 # point. — ^27. P. prostratum. 



Spikelets nearly 2 hnes long, in two rows. A broad palea in the 

 third glume. Fruiting glume obtuse, with an awn-like point. — 

 15. P. helopus. 

 Spikelets nearly 2 Unes long, in two rows. A broad palea in the 3rd 

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

 with a short point. — 13. P. Gilesii. 

 Spikelets nearly 2 fines long, in two rows. Third glume empty. 

 Fruiting glume obtuse, without any point. Leaves hairy. — 24. 

 P. piligerum. 



(And 1st species of Paniculatae). 



