122 PAXICACE^. 



"^Also found in Jamaica, Trinidad, Cuba, Brazil. Africa, East 

 Indies." Griesb. 



28. P. Urvilleanum Kuntli. Piev. Gram. 1: 35 (1829). 



A stout branching perennial, 40-70 cm. liigh, from a rootstock; 

 culms and sheaths clothed with soft, whitish, retrorse hairs. Leaf- 

 blades 30-50 cm. long, 1 cm. wide, rigid, often convolute with 

 setaceous points. Panicle diffuse, 15-30 cm. long, rays often 

 naked for tlie lower third. Spikelets hairy, ovate, acute, 7-8 mm. 

 long; first and second glumes nearly equal, ovate, acute, the former 

 7-9-nerved, the latter 15-17-nerved; floral glume of the staminate 

 floret ovate, about 6 mm. long, 11-15-nerved, its palea nearly as 

 long, ovate, pubescent; fertile floret oval, 4.5 mm. long, smooth 

 outside, but floral glume and jialea pubescent on the inner or upper- 

 side. 



California, Pringle 887, ^S'. M. Tracy, Lemmon, Parish. 



Southern California to Chili. 



29. P. autumnale Bosc, Spreng. Syst. 1: 320 (1825). P. fra- 

 gile¥.\mi\\. Enum. PI. 1:36 (1829). P. divergens Muhl. Gram. 

 120 (1817). 



Perennial; culms erect, ascending, branching at the base, 2-4 

 cm. high. Ligule obtuse, blades numerous, flat, smooth or 

 sparingly hairy, 2-5 cm. long, 3-5 mm. wide. Panicle jDartially 

 included by the upper sheath, effuse, rays capillary, few flowered, 

 bearded in the axils. Spikelets 1-6 cm. long, single at the end of 

 rough, unbranched pedicels, lanceolate-oblong, about 3 mm. long, 

 first glume minute, second glume lance-oblong, minutely hairy 

 along the margins and between the nerves, 3-5-nerved, third glume 

 little longer, 5-nerved, otherwise like the former glume; fertile 

 floret lanceolate-oblong, brown, 2.9 mm. long. 



Illinois, U. S. Bept. Agricul. 44 from Patterson; Patterson 

 3581. 



Sand hills. Illinois and southward. 



30. P. brachyanthum Steud. Syn. PI. Gram. 07 (1855). P. 

 spars iflormnYsisej, Contrib. U. S. Nat. Herb. 3:34 (1892). P. 

 atigustifolium Chapm. El. S. States, 574 (1860) not Ell. 



Culms weak, slender, diffuse, branching, 50-80 cm. high. 



