I'ANUEE. 93 



first glume sliortiT tlum the llorct, thin, 3-norvetl, second equalling 

 the lloret, 5-nerv<'d. 



The above nanie is given on the authority of tjeneral Munro, 

 who liad seen tlie phints of I). (Jarber. 



Florida, (iarbcr 'Z'ii, in the year 1877, now in the herbarium 

 of Harvard University. 



2)i. P. Boscianum Fliigge, Monog. 170 (ISIO), P. purpiintx- 

 cens Ell. Bot. S. C. and (ia. 1: 108 (18iG). 



Culms decumbent or erect, (iO-DO em. high. Leaf-blades (hit, 

 smooth or hairy at the base, often purple, ;>(> cm. long, G-S min. 

 wide. Spikes 5-7, stmietimes lO-'^O, not crowded, 5-8 cm. long, 

 rachis Hat, 2 mm. wide. Spikelets smooth, obtuse, crowded in 

 2-4 rows, oval or obovate, 2.3 mm. long, first and second glumea 

 5-nerved, third and })alea dark brown or black when mature. 



Korth Carolina, IJ. S. Dvpt. Agn'riil. from McCarthy. 



North Carolina to Florida and Texiis. TiuTe is considerable 

 doubt as to the correct name of the grass here described. 



23. P. distichium L. AmaMi. Acad. 5:301 (1759). 



Culms ascending, 20-(I0 cm. high, from a long creeping base, 

 extending beyond the upper sheath. Sheaths smooth; blades 

 linear-lanceolate, crowded below, flat, glaucous, glabrous or rough 

 above, 4-12 cm. long, 2-4 mm. wide. Spikes 2, rarely 3, 3-0 

 cm. long, 1 sessile, the other on a short peduncle, rachis flat on 

 the back, 1-2 mm. wide. Spikelets smgle in two rows (some- 

 times crowded in more than two rows), those in the middle of a 

 lineal line overlapping one fourth their length, oval, ovate. 3 mm. 

 long; on the flat side sometimes a slender, 1-nerved glume, first 

 ordinary glume 5-nerved, second 3-nerved. 



Delaware. Cnnby ; Florida, Curtis^ 3567 ; Texas, Kpnnoijy 

 Scribner 3567 from Tweedy; Xew Mexico. Vasey ; Arizona,, 

 PriiKjli' ; Oregon, Howell; Mexico. Palmer 2'i'i. 603. 



Virginia, south and west; also East India and Australia. 



24. P. lividum Trin. MS. Schlecht. in Linn. 26:383 (1853-5). 

 Culms branching below. 60-80 cm. high. Leaf-blades 12-20 



cm. long, 4 mm. wide. Spikes 4-10, 2-4 cm. long, approximate 

 or crowded, the whole 8-10 cm. long, rachis flat, 2 mm. wide. 



