GENUS 17. 



GRASS FAMILY. 



41. Panicum mattamuskeetense Ashe. Clute's 

 Panic-grass. Fig. 351. 



P. mattamuskeetense Ashe, Journ. E. Mitch. Sci. Soc. 



15: 45. 1898. 

 P. C/wfct Nash, Bull. Torrey Club 26: 569. 1899. 



Plant usually purplish. Culms tufted, i2-3z tall, 

 glabrous, the nodes sometimes puberulent or the 

 lower ones barbed ; sheaths loose, the upper ones 

 glabrous excepting on the margins and occasionally 

 toward the summit, the lower ones often softly 

 pubescent; blades 2\'-^k' long, 3" -6" wide, firm, lan- 

 ceolate, ascending or sometimes reflexed, glabrous ; 

 panicle 2^-4 long, broad and open ; spikelets about 

 li" long, a little more than i as wide, pubescent with 

 short hairs. 



Sandy borders of swamps and bogs, Massachusetts 

 to North Carolina. July. 



42. Panicum octonodum J. G. Smith. Eight- 

 jointed Panic-grass. Fig. 352. 



P. octonodum J. G. Smith ; Scribn. Bull. U. S. Dep. 

 Agr. Agrost. 17: 73. 1899. 



Plant glabrous and usually purple. Culms erect, 

 2-3i tall, finally branched; sheaths much shorter 

 than the internodes ; ligule a narrow ring usually 

 less than \" wide; blades erect, firm, ii'-4i' long, 

 2"-4" wide, lanceolate; panicle 3'-$' long, J'-ii' 

 wide, dense, longer than broad, its branches erect 

 or erect-ascending; spikelets less than I" long and 

 i" wide, oval, glabrous. 



In wet places, New Jersey to Florida and Texas. 

 May-Aug. 



43. Panicum paucipilum Nash. Purple 

 Panic-grass. Fig. 353. 



P. paucipilum Nash, Bull. Torr. Club,. 26: 573. 1899. 



Plant usually purple. Culms 2-3i tall, finally 

 somewhat branched, smooth and glabrous ; sheaths 

 ciliate .on the margin toward the summit, otherwise 

 glabrous; ligule over i" long; blades 2.\'-Z\' long, 

 2$"-3i" wide, erect or ascending, thickish, rather 

 firm, sometimes minutely puberulent on the lower 

 surface, usually with a few hair-bearing papillae at 

 the base; panicle 2'-^' long, longer than broad, its 

 branches erect or erect-ascending, rather dense ; 

 spikelets 3" long or a little less, a little over i as 

 wide, oval, pubescent with spreading hairs. 



In wet soil, southern New Jersey to Florida and 

 Mississippi. July and Aug. 



