PANICE.E. 153 



A ratlicr slender, erect grass, 30-40 cm. high. Culms branched 

 at the base, compressed. Sheaths compressed-keeled e(|iialling, or 

 the upper longer than tlie internodos; ligule a ciliate ring; blades 

 erect, acuminate, 10-20 cm. long, 4-8 mm. wide. Panicle erect, 

 loosely flowered, 6-10 cm. long, G-10 mm. diam., rachis and rays 

 angular, scabrous, bristles about twice as many as the fertile flowers, 

 1-2 cm. long, rays irregular, 6-12 mm. long, 1-5-10-flowered. 

 Spikelets ovoid, acute, about 3 mm. long, first glume very broad, 

 obtuse, concave, thin. 5-11-nerved, 1.3 mm. long, second obtuse, 

 thin (with cross nerves), subreniform, 13-19-nerved, third ovate, 

 obtuse when spread. 7-0-nerved, with or without a palea; floral 

 ghinie ovate, mucronate. 2 mm. long. Spikelets appear acute, 

 owing to the involution of the apex of the glumes. In the above 

 description, Dr. Vasey is followed rather closely, though the ])lant 

 was examined. 



Nearly allied to C. latiyhimis, and perhaps one is a mere variety 

 of the other. 



Mexico, PdJnwr 78. 



5. C. Ventenatii (Kunth). 



Sctaria Ventetiatii Kunth. "Rev. Cram. 1 :251. t. 37 (1829). 



Culms erect, glabrous, slightly compressed. pul)escent at the 

 nodes, 40-00 cm. high. Slieatlis compressed; ligule a fringe of 

 hairs; blades scabrous, flat, narrow l)e[ow, 15-30 cm. long. 5-7 mm. 

 wide. Spikes much exserted, thin, purplish. O-Scm. long. Spike- 

 lets 2-4 in a cluster or single, having 2-3 bristles 15 mm. long, each 

 (including those abortive) with asjierities ])ointing upwards, oval, 

 almost pointed, gibbous, 2.5 mm. long; lirst glume deltoid, half as 

 long as the spikelet, 3-nerved, second longer, 5-7-nerved, third 

 5-nerved: fertile floret slightly wrinkled transversely. Index 

 Kowensis includes this under Si'larid (/hiKca. 



Florida. <!. V. \asJi 1382 in 18!)4. 



6. C. flava (Kunth) Kuntze, l{ev. Cen. PI. 770 (1801). Sefnria 

 jiara Kunth, Rev. Cram. 1 : 40 (1820). Pnnicum Jlavum, Nees, 

 Trin. (;ram. Panic. 1G2 (1833). 



Culms erect, comjtressed, smooth, branching below, 30-60 cm. 

 high. Sheaths com[)ressed; ligule a mere ring, thinly pubescent; 



