J 54 



GRAMINEAE. 



Vol. I. 



50. Panicum praecocius Hitchc. & Chase. 

 Early-branching Panic-grass. Fig. 360. 



P. praecocius Hitch. & Chase, Rhodora, 8: 206. 1906. 



Culms 6'-i8' tall, slender, branching almost at 

 once, the secondary panicles appearing before the 

 primary ones are mature, strongly pubescent with 

 long weak spreading hairs over ii" long; sheaths 

 similarly pubescent; ligule i$"-2" long; blades 

 i¥-3' long, 2"-3i" wide, lanceolate, hirsute with 

 long hairs on both surfaces, the hairs on the 

 upper surface erect and over 2" long; primary 

 panicle 1Y-2Y long and about as wide, its 

 branches spreading or ascending; spikelets a 

 little less than 1" long, obovoid, pubescent with 

 long weak spreading hairs, the first scale i as 

 long as the spikelet or a little less. 



Dry places, Michigan to Texas. June-Aug. 



51. Panicum implicatum Scribn. Slender- 

 . stemmed Panic-grass. Fig. 361. 



P. implicatum Scribn. ; Nash, in Britt. & Br. 111. Fl. 

 3: 498. 1898. 



Culms tufted, erect, io'-22' tall, very slender, 

 more or less pubescent, at length much branched. 

 Sheaths shorter than the internodes, densely papil- 

 lose-hirsute, at least the lower ones; ligule a ring 

 of long hairs ; blades erect, lanceolate, i'-2i' long, 

 1 "-3" wide, at least the lower ones papillose-hirsute 

 on both surfaces, especially beneath ; panicle open, 

 ovate, i'-2i' long, hirsute, its branches widely 

 spreading; spikelets broadly obovate, obtuse, pur- 

 plish, about I" long, the outer 3 scales pubescent 

 with short spreading hairs, the first scale nearly 

 one-half as long as the spikelet, broadly ovate, 

 obtuse, i-nerved, the second and third scales orbic- 

 ular-oval, 7-nerved. 



Dry soil, Nova Scotia to Minnesota, District of Co- 

 lumbia and Kentucky. 



52. Panicum meridionale Ashe. Matting 

 Panic-grass. Fig. 362. 



Panicum meridionale Ashe, Journ. E. Mitch. Sci. Soc. 



Soc. 15: 59- 1898. 

 Panicum filiculme Ashe, Journ. E. Mitch. Sci. Soc. 15 : 



59. 1898. Not Hack. 1895. 

 Panicum subvillosum Ashe, loc. cit. 16 : 86. 1900. 

 tPanicum albemarlense Ashe, loc. cit. 84. 1900. 

 Panicum oricola Hitchc. & Chase, Rhodora, 8 : 208. 



1906. 



Culms densely tufted, 4/-16' tall, later much- 

 branched and often decumbent and forming mats, 

 hirsute below with ascending or nearly erect hairs, 

 the upper part of the culm puberulent; sheaths 

 hirsute with ascending or somewhat spreading hairs ; 

 ligule commonly over 1" long; blades i'-3' long, 

 1' -3" wide, erect or nearly so, lanceolate, the upper 

 surface with erect hairs over \k" long, or some- 

 times nearly glabrous, the lower surface appressed- 

 pubescent with shorter hairs; panicle up to 2' long, 

 the axis puberulent or very shortly pilose, the 

 branches spreading or ascending; spikelets from a 

 little less than I" to nearly 1" long, pubescent. 



Sandy places, Nova Scotia to Minnesota, Georgia and 

 Missouri. June and July. 



