28 JOURNAL OF THE ’ 
Leaves less than 2” wide, erect, low species. 
Pamole’ 1-132" lone. 2). wae 67. P. meridionale. 
Pasiclestess than :]’ dongs Sr. sti, 68. P. filiculme. 
Stem leaves few, short, 1%’ long or generally much less, distant, the 
densely tufted basal leaves as long as the stem leaves or nearly so, 
and broader; spikeletsf"long or less. 
Basal leaves ciliate around the entire margin; otherwise glab- 
rous. 
Spieciels elipric, ‘I long, Arca iesk as 69. P. ciliatum. 
Spikelets. cbovate, 4 long... ...0..5..05. 70. P. polycaulon. 
Basal leaves soft pubescent as well as ciliate 71. P. longipedun- 
culatum. 
Margin of basal leaves not ciliate. 
yor i toeg sb 2 crt a1 | Eee he ce Oe Eeay See oe 72, P. microphyllum, 
Stems glabrous, ligule short, pubescent, .... 73. P. Brittoni. 
Stems glabrous, ligule none ........... 74. P. glabrissimum. 
1) PANICUM PORTERIANUM Nash, Torr. Bul. 22:420 
(1895). P. lalzfoltwm Walt. Fl. Car. (1788). Not. oi 
(1753). P. Walteri Poir., (1816). Not Pursh. (1814). 
Stems somewhat tufted, erect, columnar, soft-villous, 
or nearly glabrous, at first simple, at length somewhat 
branched at the top. Sheaths shorter than the inter- 
nodes, or the upper ones overlapping, soft pubesScext, or 
nearly glabrous and only the nodes barbed with soft 
hairs, ligule a mere margin. Primary leaves ovate-lan- 
ceolate, 2?—23’ long, ~’-—1’ wide, cordate at base, abrupt- 
ly acuminate, glabrous or roughish above, ¢labrous or 
soft-pubescent beneath, 6—13-nerved ; secondary leaves 
smalier. Panicle short-peduncled, 2’—4’ long, ovate, 
the few branches ascending or spreading ; spikelets rath- 
er few, obovate, acute, nearly 2” long, pubescent. 
Northern Florida and Texas to Missouri and New York. 
2) PANICUM MACROCARPON Le Conte, Torr. Cat. 91 
(1819). Stem strict, 12—20° high. glabrous. Sheaths 
olabrous ; ligule a mere margin. Leaves 2—4 lone, 
about 1’ or more broad, 7—11l-nerved, glabrous, except 
the rough, ciliate margins. Panicle 3—4 long, the few- 
