PANICE.E. 87 



Bot. S. C. and Ga. 1:109 (1817). FaspalumfluitansKmith, Rev. 

 Gram. 1:24 (1820). 



Culms branching, ascending, creeping or floating from a rhizome, 

 30-90 cm. long, nodes soft hairy. Upper sheath extending nearly 

 to the spikes; blades flat, thin, acuminate, 5-15 cm. long, about 1 

 cm. wide. Spikes racemose, 40-60, alternate and verticillate, 

 spreading, 3-7 cm. long, the thin rachis 1.5 mm. wide, extending 

 3 mm. beyond tlio spikelets. Spikelets in two vertical rows, pu- 

 bescent, oblong, acute, 1.5 mm. long, first and second glumes very 

 thin, 2-nerved. 



Louisiana, A. B. Langlois, collected in 1885. 



Virginia to southern Illinois and southward. 



6. P. repens Berg. Act. Helvet. 7, ^. 7 : 129 (1772). 



P. pyramidaJe Nees, Mart. Bras. 2 : 77 (1829). P. gracile Steud. 

 in part. 



Culms creeping or floating in water, the ascending portion 20- 

 30 cm. high. Sheaths longer than the internodes, inflated, scabrid, 

 spotted, the throat bearing two peculiar stipular appendages, 5-7 

 mm. long; ligule lacerate, truncate, brown, 2-3 mm. long; blades 

 flat, scabrous, acute, 10-18 cm. long, 7-15 mm. wide. Spikes 

 75-100 or more, ascending, crowded into an erect, ovoid, spikelike 

 raceme, about 9 cm. long; the spike 2-3 cm. long, the thin invo- 

 lute rachis 3 mm. wide, the acuminate tip projecting 8-10 mm. 

 above the spikelets. Spikelets in a single vertical row of 5-8 in 

 number, oblong, subacute, 2-2.2 mm. long, first and second glumes 

 equal, very thin, 2-nerved, a little longer than the floret. 



Mexico (Jalisco), Pringle 3854; also found in South America; 

 growing in water. 



7. P. racemosum Lam. Illustr. 1:170 (1791). 



Culms erect, simple, 60-120 cm. high from a scaly root-stock. 

 Lower sheaths thinly clothed with long hairs; blades linear- 

 lanceolate, glaucous, keeled, 30-40 cm. long, 5-10 mm. wide. 

 Panicle erect, exserted, 15-20 cm. long. Spikes 3-4, lax, slender, 

 4-16 cm. long, rachis triquetrous- terete, flexuose. Spikelets 

 smooth, in alternate pairs, distant, pedicels 2-5 mm. long, oval, 

 obtuse, about 4 mm long, first glume 5-7-nerved, second 3-5-nerved. 



