94 PANIC AlE.E. 



Si)ikelet8 rutlier iiat, oviil, ubrui)tly jjoiiited, smooth, piilf ^'reeii, in 

 4 rows or irregularly arranged, 'Z.5 iiiiii. loug, tirst ami st'cond. 

 glumes 3-uerved, third a little shorter, obtuse. 



Mexieo, Pidnur 20C. 



Texas to Mexico. 



25. P. elatum Uieh. Doell, Mart. Fl. liras. 2, part 2, 78 (IHT:). 



Culms erect, glabrous, rooting at the lower nodes, 50-00 em. 

 high. Leaf-blades 20-1)0 em. long, 1.5-2.5 wide, tlat, smooth 

 excepting the margins, which are rough, apex narrowly acuminate. 

 Spikes 5-T, l-:J em. I 'om each other, 4-S cm. long, s])reading, 

 rachis Hat on the back, 2 mm. wide. Spikclets in pairs, in four 

 crowded rows, obovate, subacute, li mm. long, first and second 

 glumes with 1 nerve in the middle and 2 near each nuirgin. 



J^ouisiuna, J. />*. Lanylais in lb80. 



Found from Florida to Texas. 



20. P. Buckleyanum Vasey, Bull. Terr. Club, 13: 107 (1880). 



Culms simple, smooth, decumbent ut the base, OO-DO cm. high. 

 Leaf-blades scabrous, conduplicatc, 20-40 cm. long, 3-4 mm. 

 wide. Panicle erect. 12-18 cm. long; si)ikes 3-0, altenuite, 2-3.5 

 cm. distant, tlie lower G-T cm. long, the upper 3-4 cm. long, 

 rachis straight. S[tikclets light-colored, in four rows, the middle 

 ones overlapjiing for half their length, elliptical, oblong, acute, 

 2.5-2.T mm. long, first and secontl glumes sparingly pubescent, 

 3-5-nerved. 



Nearly related to P. liciditiH, from which it ilillers in its longt-r 

 l)aniclc. more numerous, longer and more distant spikes, and liie 

 spikclets pubescent. 



'I'exas. Jii(ckh>)/ and XcdJ/ci/. 



27. P. vaginatum S\v. Fl. Ind. Occ. 1:135 (1797). 



Culms from a creej)ing base, intei'nodes short, 10-40 cm. high. 

 Leaf-blades smooth, distichous, involute, pointed, 3-9 cm. long. 

 Spikes 2, rarely 3 or 4, 2-5 vm. long, on exserted pedicels. Spike- 

 lets in two rows, overlapping about one fourth of their length, 

 oblong-lanceolate, acute, 4 mm. long, first glume 5-uerved, second 

 2-nervcd. 



Florida, J. //. Cnrfitift. 



