HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 



227 



Fig. 236.— Distribution of P. praecocius. 



DISTRIBUTION. 



Dry prairies and clearings, Michigan and Indiana to Minnesota and Texas. 



Indiana: Hessville, Hill 49 in 1909. 



Illinois: Joliet, Hill 37 in 1907; Wady Petra, V. H. Chase 472, 649, 1212, 1214, 

 1218, 1492, 1515; Marshall County, V. H. Chase 1791; Williamsfield, V. H. 

 Chase 1850; Havana, Gleason 

 1034. 



Michigan: Port Huron, Dodge in 

 1909. 



Wisconsin: Lauderdale, Behh 

 2057. 



Minnesota: Itaska Lake, Sand- 

 berg 1016. 



Iowa: Fort Dodge, Somes 25; 

 Armstrong, Cratty in 1890; 

 Iowa City, Somes 246. 



Nebraska: Broken Bow, T^e66e?"4. 



Missouri: Monteer, Bush 748, 749 



in part; McDonald County, Bush 87; Howell County, Bush 54; Lees Sum- 

 mit, Bush 3090, 3935. 



Kansas: Manhattan, Carleton in 1892, Hitchcock 2500, 2524, 3853, Kellerman 20; 

 Belleville, Hitchcock 3544. 



Texas: Waller County, Thurow 5, and in 1906; Weatherford, Traaj 7943 in part. 



Oklahoma: Stillwater, Hitchcock in 1903 (Hitchcock Herb.). 



i/ 132. Panicum subviUosum Ashe. 



Panicum subviUosum Aehe, Elisha Mitctell Soc. 16: 86. 1900. "Collected by the 

 writer at Carlton, Minnesota, in August, in the simple state. Type material pre- 

 served in my herbarium." The type specimen, in Ashe's herbarium, consists of 

 three tufts of several culms each, 15 to 30 cm. high, with leaves clustered at the base 

 and long-exserted mature panicles. 



Panicum unciphyllum forma pilosum Scribn. & Merr. Rhodora 3 : 124. 1901, not 

 Panicum pilosum Swartz, 1788. "Dry woods, Orono, Maine, 501 M. L. Fernald, 

 July 7, 1891." The type, in the National Herbarium, consists of a tuft of nine slender 

 culms 15 to 35 cm. high, with long-exserted nearly mature panicles. 



description. 



Vernal culms tufted, 10 to 45 cm. high, slender, ascending or spreading, pilose with 

 ascending hairs, usually faintly papillose, the lower internodes short, thus making the 



plant more leafy below, the nodes short-bearded; 

 sheaths sparsely pilose with ascending hairs, the 

 lower overlapping, the upper much shorter than 

 the long internodes; ligules 3 mm. long; blades 

 rather firm, ascending, 4 to 6 cm. long, 4 to 6 mm. 

 wide, rarely wider, acuminate, slightly narrowed 

 toward the base, both surfaces pilose, the hairs on 

 the u^jper surface 3 to 5 mm. long, shorter on the 

 lower; panicles long-exserted, ovate to oblong in 

 outline, 3 to 5 cm. long, two- thirds to three-fourths as 

 wide, rather densely flowered, the axis pubescent or toward the base pilose, the lower 

 branches ascending; spikelets 1.8 to 1.9 mm. long, 0.9 mm. wide, elliptic, obtuse, 

 pubescent; first glume nearly or quite half the length of the spikelet, acuminate; 



Fig. 237.— p. subviUosum. From 

 type specimen. 



