166 PANICACE^. 



A reedliko grass 1-2 m. or more high., culms hard. Ligule a 

 fringe of liairs; blades flat, long-pointed, some of the upper 20-30 

 cm. long. 2 cm. wide. Panicle of spikes GO-90 cm. long, consist- 

 ing of 100 or more s])ikes which are 3-G cm. long, 10-15 diam. 

 Uristlos of the involucre 5-1.") mm. long, 25-40 in number sur- 

 rounding each spikelet. Spikelet linear-lanceolate, 5 mm. long, 

 hi'st glume minute, second 1.5 mm. long, tliird as long as the 

 lloret. 5-ncrved. 



^le.xico, Pri iHjIe ()0',o. 



Rocky slopes of ^Mexico. 



:. P. setosum (8\v.) Kieh. Pers. Syn. 1:72 (1S05). C'ci/r/inis 

 .vr/asv/.s- S\v. V\. Ind. Occ. 1:20 (1797). I\ pwjmrascens II. B. 

 K. Nov. (ien. et Sp. l:li;5 (1815). 



Perennial; culms branching, 90-120 cm. high. Sheaths 

 smootli; ligule ciliate; blades rough or glabrous, 20-50 cm. long, 

 10 mm, wiile. 8[)ike scarcely exserted, cylindrical, dense, about S-15 

 cm. long, 1 cm. diam., bristles often as long as the single s])ikelet, 

 with one or more 2-3 times as long, plumose below. 8i)ilvelet 

 liiu^ar-ovate, 4 mm. long, first glume delicate. 2 mm. long, second 

 and floral glume ot the neuter floret equal, delicately 5-nerved, the 

 tormer ovate-cuiuMite, the latter oval, obtuse, emi'rginate, or irreg- 

 ularly toothed, palea of the lower floret 3 mm. long, 2-nerved; fer- 

 tile lloret smooth, narrowly ovate, 2.5 mm. long, flora^ glume deli- 

 cately 7-nerved, its palea obtuse, truncate, fringed. 



Mexico (Jaliseo), /' ih'v 677. 



Florida, Mexico, ^\ . jt Indies, Brazil, tropical Africa, East 

 Indies. 



8. P. LoyoisTYLUM Iloclist. Flora, 24:1 (1841). I. Intell. 

 10, name only. 



Cnln.s branching, erect, 90-120 em. high, from a branching 

 rootstock. Sheaths smooth, shorter than the internodes; ligule 

 ciliate; blades Hat, hispid, 30-40 or more cm. long. 3-5 mm. wide. 

 Spikes dense, exsertod, ovate or oblong, 5-12 em. long, the short 

 sti])es covered with still hairs 1 -2 mm. long, involucre surrounding 

 a single spikelet, 3-4 cm. lorig, the bristles plumose for one-third 

 their length, the ])ur))lc styles ])roJecting for 15 mm. Spikelets 



