128 PAXICACE.E. 



Introduced along tlie Gulf coast, near salt water; also found in 

 Mexico, Brazil, Euroiie, Asia, northern Africa and Australia, 



Var. confertum A'asey, Contrib. U. S. Nat. ]Ierb. '3:'2S 

 (18!)'i). 



(Julnis 7-;}0 cm. higli. blades spreading, 3-G cm. long, 3-5 mm. 

 wide; })anicle simple, 2-7 cm. long; tirst glume longer and less 

 obtuse. 



Louisiana. LuHijlois. 



Near sailt water on the Gulf coast. 



\-l. P. anceps .Michx. Fl. Bor. Am. 1 : 48 (1803). 



A rather sleniler erect i)ereuuial, GU-'.)0 cm. high, culms 

 flattened from stout, scaly rootstocks, the internotles of whicli are 

 2-3 mm. long. Slieatlis often hairy ; blades scabrous or not, 

 slender, 30-1:0 cm. long. 5 mm. wide. Panicles terminal, 20-40 

 cm. long, rarely one or more lateral ones, rays erect or spreading. 

 S|)ikelets ovate-oblong, acute, often bending sidewise from the ap- 

 pressed branches at a wide angle. I)ringing pedicel and first glume 

 into line. a})ex often curved, 2.2-2.5 mm. long; first glume over 1 

 mm. long, 3-nerved, secoiul ovate, 5-T-i\erve(l ; floral glume of 

 sterile spikelet like the latter, only a little longer, its palea two- 

 thirds as long; fertile floret smooth, hard, elliptical, 1.5 mm. long. 

 Some forms are much like /'. a (j fast aides Spreng. District of 

 Columbia. V. S. Dvpt. Afjrieul. ^'rom Gerald McCarthy. 



Alabama, Mohr. 



Massachusetts to Texas. 



43. P. agrostoides Muhl. Gram. 119 (1817). 



An erect branching perennial, with smooth, flattened culms, 

 S()-180 cm. high. Sheaths often compressed, softly hairy; IjJades 

 flat, smooth or rough, 40-80 cm. long, 7-12 mm. wide. Panicles 

 20-40 cm. long, usually reddish or purple, terminal and lateral, 

 rays numerous, spreading or erect. Si)ikelets elliptical or lanceo- 

 late, nsually in line with the very short ])edicels, apex straight, 

 2-2.5 mm. long; first glume acute. 1.5 mm. long, 3-nerved, second 

 5-nerved; fioral glume of sterile floret like it, only shorter, its palea 

 two-thirds as long; fertile floret smooth, oval, 1-'1.5 mm. long. 

 Quito variable. 



