292 I'OACK.Ti:. 



/)-7 cm. long, their brunches very sleTulcr, bearing .singU'-iiedicellod 

 Kpikelcts which sire liglit k'iul-color. Kni[)ly ghiines elliptical or 

 ovate-liinceolate, l-nerved, llrst about "-.* mm. long, second *~'.5-;j 

 mm. long; Uoret clothed with Imirs on the nerves, 0..") mm. long; 

 llural glume ovale, acute or obtuse. ;{-nerved, '2.7 mm. long; palou 

 nearly as long, though mirrower. 



Arizona, LeiiiitKin :JT(), .lones; Mexi(!o, Prinffle H'l'ii. 



VI. S. rlACtilKMONTll Kunth, liev. (Irani. 2:4'.'; (IS'.'O). 



A tuTled slender erect })erennial, OU-JJO cm. high. Sheaths u 

 little over hall' the length of the internodes; ligule very short; 

 leaves ol' sterile shoots lew, those of the culm 4, erect, involute, 

 seabrid a])ove. 10-15 cm. long, ^ mm. wide. I'anicle exserted, 

 erect, sjtreading, at length contracted, about ^0 cm. long, rays 

 slendei', .scattered or in twos and threes, the longest ;J-4 cm. long, 

 bearing scattered appressed spikelets for the entire length. Spike- 

 lets light brown, empty glunu'S l)road, first a little less, the .second 

 a little more than (1.5 mm. long, the latter l-nervc(l; lloral glumo 

 ovate, a(Uite, obscurely IJ-nerved. 1..5 mm. long; i)alea oblong, trun- 

 eate-erosc, 1.') mm. long. (Jrain oblong, 1 mm. long. 



U. S. Dept. Agricul., collected in Jamaica. 



A good pasture-grass in .Jamaica, Haiti, etc., where it is found. 



14. S. tenacissimus Ueauv. Agrost. 2(1 (1812). Vi/f(t /c/Ktrisiii- 

 nia, II. B. K. Nov. (len. et. Sp. 1 : DJS (ISI,*)). Likxdkii.i.a. 



An en'ct stout grass. '.tO-I4() cm. high ; culms smooth. Sheaths 

 smooth; ligule less than 1 mm. long; blades smootli except the 

 ujiper side, those of sterile slioots <i(* cm. or more long, those of the 

 culm 4 in number, iry-'.ib cm. long, 5-7 mm. wide at the base, tajier- 

 ing into fine })oints. Panicle but little exserted, erect, ;}0-50 cm. 

 long, 1-2 cm. diam., some of the lower appressed, rays 7-12 cm. 

 long, those above gradually becoming shorter. Spikelets very 

 numerous ami crowded; empty glumes almost hyaline, obtuse, 1- 

 nerved, first 0.7 mm. long, second 1-2 mm. long; lloral glume oval 

 when spread, concave, ;5-nerved, 2.3 mm. long; palea nearly as long 

 as its glume, 2-nerved. Grain broadly obovoid, pericarp persistent. 



Mexico, Palmer 205. 



Dr. Palmer reports that the Mexicans twist these grasses into 



