488 roAcE.E. 



racliis in 2 irregular rows. Secoiul ompty glume 1- 



ucrved (d) 



d. I'unick' spikc'like 5 



d. Pur'cU- bniiiuhing (o) 



e. Klonil i^duinu loss than '.\ mm. long (in) 



m. i'uniclc 2-8 cm. long 



ni. 15-35 cm. long 7 



c. Floral glunio .] mm. long, 8 



e. Floral glumo :}.5 mm. long 9 



0. Floral glume 4 mm. long (n) 



n. Seeond empty glume ',\ mm. long 10 



n. Second empty glume -l-r) mm. long 11 



0. Goiiinia Fourn. as a genus. Spike.s of the panicle long 

 aiul slender. Spikelets scattered along the three sides of 



the rachis, 1-nerved, lloral glumo ;3-nerved (o) 



o. Awn l-;{ mm. long 12 



o. Awn 8-13 mm. long 13 



1. L. scabra Nees, Agrost. Hras. 4:55 (1830). L. Laufjhtisii 

 Vasey, liuU Torr. Club, 13:7(188,^)). A. Liidanrinnn \iimy. 



Culm smooth, stout, leafy, 100-i;50 cm. high. The lower 

 blades one-third as lOng as the culm; sheath.s loose, comj)ressed. 

 glaucous, 30 cm. long, about 1 em. wide. Panicle scarcely proi Hid- 

 ing or j)artially included by the upper leaf, racemose, 30-30 cm. 

 long, about 5 cm. wide, loose, simple, spikes 100 or more, crowded 

 below, single or 3-3 together, 5-7 cm. long. Spikelets :{-4-Howered, 

 sessile, loosely imbricate, 4 mm. long; the internode of the rachilla 

 for each floret 1 mm. long; empty glumes membrajious, ovate, 

 acute, 1-nerved, first 0.7 mm. long, secoiul a third longer; floral 

 glume oval when spread, mucronate, 3-nerved, hairy on the back, 

 3.5 nnn. long; palea about as long as its glume, ciliate on the 

 nerves, 3-toothed. Grain 3-sided. 

 Louisiana, Lafu/Jois. 



3. L. mucronata (Michs.) Kunth, Gram. 1:91 (1839-35). 

 Ehusine mucronata Michx. Fl. Hor. Am. 1:G5 (1803). L. Jili- 

 fonnis J. & C. Presl, Pel. ILvnk. 1:388 (1830). L. altenuata 

 Steud. Syu. PI. Gram. 209 (1855). L. pcllucida 1. c. 



