ORYZOPSIS PASPALUM 357 



1. Spikelet, exclusive of awn, 2-5 mm. long 



a. Awn 1-2 mm. long, much shorter than the lem- 



ma ; spikelets 3-4 mm. long O.juncea 



b. Awn 4 mm. long; spikelets 4-5 mm. long O. exigua 



c. Awn 6-8 mm. long; more than twice as long 



as the lemma ; spikelets 2-2.5 mm. long O. micrdntha 



2. Spikelets, exclusive of awn, 6-8 mm. long O.asperifolia 



PANICULARIA Fabricius 1763 MANNA GRASS 



(Lat. panicula, panicle) 



(Glyceria Robert Brown) 



PL 45, fig. 20. 



Spikelets 3-13-flowered, in panicles ; glumes acute or obtuse, 1-3-nerved ; 

 lemma rounded on the back, 5-9-nerved, palet scarcely shorter, 2-keeled; 

 perennial swamp or water grasses. 



1. Spikelets ovate to oblong, 2-6 mm. long 



a. Panicle 3-8 in. long, nodding, at least above 



( 1 ) Spikelets 2-4 mm. long ; lemma 7-nerved P. nervdta 



(2) Spikelets 4-5 mm. long; lemma 5-nerved P.pauciflora 



b. Panicle 8-15 in. long, erect or nodding P. grdndis 



2. Spikelets linear, 1-2 cm. long P. ftuitans 



PANICUM Linne 1753 PANIC GRASS 



(The Latin name) 



PL 46, fig. 30. 



Spikelets 1-2-flowered in panicles, when 2-flowered the lower one 

 staminate ; glumes 2, sterile lemma sometimes with a staminate flower ; lem- 

 ma and palet enclosing the perfect flower ; awns none ; annual or perennial. 



1. Spikelets pointed, lanceolate or lance-ovate 



a. Stems 1-2 ft. high; sheaths bristly-hairy; spike- 



lets 2-3 mm. long P. capilldre 



b. Stems 3-5 ft. high ; sheaths not hairy ; spikelets 



4-5 mm. long P. virgdtum 



2. Spikelets not pointed, obtuse or rounded, ovoid to 



obovoid, 2-3 mm. long P.scoparium 



PASPALUM Linne 1759 PASPALUM 

 (The Greek name of a grass) 



Spikelets 1 -flowered, oblong to round, plano-convex, in 2-4 rows on 1- 

 sided spikes, the latter single, paired or panicled; glumes 2; lemma and 

 palet with a perfect flower; perennial. 



