57G f;i!.\MiNK-i:. (grass i'amii.y.) 



coast, Florida, and iioiiliwanl. May. — Culms .3° -4° liij;li, soon niiicli liranclicd. 

 Li-nves G'-lo' long. Branches of the ])anicli' smooth. — In the smooth form ot 

 this s|)ccics I notice a rcmarkaUlc deviation from the generic cluuacter. Tlic 

 two glumes and lower palea of the sterile Hower arc ns usual in the genus, while 

 the upper ])alea of the latter is developed into an apparently perfect flower, in 

 all respects similar to the upper one. 



2.'}. P. scabriusculum, F>il. Culm (.3° -4° long), sheaths, and lower 

 surface of tiie liiicar-lanccolatc leaves rough and more or less pubescent ; panicle 

 ample, compound, diffuse, pubescent below, the divisions gmooth ; spikelets 

 small, ovate, rough, but not pubescent ; upper glume 9-nerved, the lower minute. 

 ^- Pine-barren swamps, Florida to North Carolina. May. — Probably a form of 

 the last. 



24. P. microearpon, Muhl. Culm and leaves smooth ; the latter lance- 

 olate, tapering from a broad cordate base, strongly nerved, fringed on the mar- 

 gins near the base ; panicle compound, diffuse ; spikelets very numerous, small 

 (^" long), oval, pubescent ; upper glume .5-nerved, 3 times the length of the mi- 

 nute lower one. (P. multiflorum, Ell., not of Poir. P. ovale. Ell. ?) — Dry soil, 

 South Carolina, and northward. May. — Culms 2° -2^° high. Leaves 4' -6' 

 long, 8" -10" wide. 



25. P. dichotomuni, L. Culms at length much branched ; panicle 

 nearly simple, few-flowered ; leaves linear-lanceolate, bearded at the base, or vil- 

 lous all over. (P. villosum. Ell.) — Var. 1. Panicles compound, diffuse; 

 spikelets small ; leaves linear-lanceolate, and, like culm, sheaths, and panicle, 

 soft hairy (P. lanuginosum, Ell.), or only at the joints of the culm (P. barbula- 

 tum, ]\fichx.), or smooth throughout (P. nitidum, Eli, spikelets purple and 

 very minute). — Var. 2. Culms weak; panicle loose, compound ; sheaths and 

 pale-grccn thin leaves soft hairy (P. pubescens. Ell.), or the margins of the 

 otherwise smooth leaves fringed with long hairs (P. ciliatum, Eli). — Var. 3. 

 Culms (2° higli) smooth ; leaves large (6' -8' long), lanceolate, rough or downy 

 above, margins near the base and sheaths fringed ; panicle large, diffuse ; spike- 

 lets (1" long) oblong, nearly smooth. (P. nervosum, Ell. ?) — Var. T 4. Culms 

 smooth and rigid (1°- 1^° high) ; leaves pale, rigid, lanceolate, fringed ; panicle 

 oblong, diffuse ; spikelets minute, oval, very hairy. (P. sphserocarpon, Ell.) — 

 Woods, fields, and swamps, everywhere, in some one of its numerous forms. 

 March - May. 



26. P. depauperatum, Muhl. Culms low (2' -12' high), simple, erect, 

 like the linear leaves ; panicle sim])lc, few-flowcrcd, with the branches erect, often 

 shorter than the subtending leaf; spikelets oval-obovate (1" long), mostly acute ; 

 upper ghime 9-nervcd, smootbisb, three times the length of the ovate lower one. 

 (P. strictum, Pursh.) — Dry sandy soil, North Carolina, and northward. June. 

 — Leaves rigid, 2' - G' long, smoothish or hairy. 



27. P. melicarium, Michx. " Culm weak ; leaves narrow ; panicle con- 

 tracted ; glumes meniliranaceous, lanceolate, nearly equal ; rudiment of a flower 

 stalked. — In Carolina and Georgia. Very smooth. Leaves long. Panicle 

 slender, long, with few branches." Michx. ( * ) 



