182 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
glabrous, or rarely minutely pubescent; first glume one-fourth the length of the 
spikelet or less; second glume a little shorter than the sterile lemma and slightly 
exposing the fruit at maturity; fruit 1.3 to 1.4 mm. long, 0.7 mm. wide, elliptic, 
slightly pointed. 
Autumnal form much branched from all the nodes, reclining from the weight of 
the dense mass of branches; blades reduced, flat, mostly 2 to 
4cm.long; the ciliz of the sheaths and the hairs at the base 
of the blades relatively more conspicuous; panicles much 
reduced and loosely flowered; the tufted basal blades often 
large, sometimes as much as 8 cm. long and 15 mm. wide. 
The following specimens have pubescent spikelets, but 
differ in no other respect from the typical form: Massa- 
Fig. 178.—P. microcarpon. cHusprrs: Bartlett 844; Connecticut: Bissell 5570; New 
From type specimen in . . 
Elliott Herbarium. JERSEY: Heritage 4; PENNSYLVANIA: Smith 102; ILLINors: 
Schneck in 1880; DELAWARE: Canby 15; District or CoLuM- 
BIA: Pollard 408, Vasey in 1884; Norwu Carona: Biltmore Herb. 803a, Chase 3204; 
Georeta: Ruth 57; Frorma: Curtiss, P.Q.; AtaBamMa: Carver 40, Hitchcock 1343; 
Mississippi: Tracy 1733, 3388,¢ 3623; ARKANSAS: /leller 4237. The last specimen is 
also exceptional in being pubescent throughout. 
Curtiss’s no, 6648, McClenny, Florida, with glabrous spikelets as much as 1.8 mm. 
long, seems to be intermediate between P. microcarpon and P. nitidum. 
DISTRIBUTION. 
Wet woods and swampy places, Massachusetts to Illinois, and south to northern 
Florida and eastern Texas. 
Massacuusetts: Milton, Bartlett 844. 
Connecticut: New Haven, Bissell 5566; Groton, Bissell 5569; Stratford, Bissell 
5571; Milford, Bissell 5570. : 
Ra#opDE Istanp: Providence, Collins in 1891 (Gray Herb.). 
New York: Eastern New York, Austin (Mo. Bot. Gard. Herb.). 
New Jersey: South Amboy, Mackenzie 1484, 2161; Morris Plains, Mackenzie 1605; 
Haworth, Mackenzie 2476; 
Wildwood, Chase 3516, Heri- 
tage 4, 4’; Clifton, Nash in 
1892. 
PENNSYLVANIA: Lancaster County, 
Heller 4770 in part, 4787, Small 
in 1889; Philadelphia, Smith 
102, 
Ouro: Albion, Ashcroft in 1897; 
Jackson, Kellerman 6778. 
INDIANA: Brazil, Somes 232. 
Intinors: Peoria, Brendel; Mount Fia. 179.—Distribution of P. microcarpon. 
Carmel, Schneck in 1880, 
Missouri: Butler County, Eggert 236; Campbell, Bush 747 in part; Dunklin 
County, Eggert 287. 
DELAWARE: Milton, Commons 346, 347; Centerville, Commons 285; Townsend, 
Canby 15. 
MARYLAND: Chesapeake Beach, Chase 3253, 3262; Hitchcock 1606, 1611; Belts- 
ville, Chase 3767, 3831; Riverdale, Chase 2367, 2370. 
District or CotumsBraA: Ball 704, Chase 5419, in Kneucker Gram. Exs. 550, 
Hitchcock 370, 596, Merrill 197, Pollard 362, 406, 408, Vasey in 1884. 
@Tracy’s no. 3388 was erroneously cited under Panicum subbarbulatum Scribn. & 
Merr. U.S. Dept. Agr. Div. Agrost. Circ. 28: 9. 1901. 
