236 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
DESCRIPTION, 
Vernal form similar to that of P. villosissimum; culms somewhat stiffer, the pubes- 
cence more silky, appressed on the culms, ascending on the sheaths; ligules 2 to 3 mm, 
long; blades somewhat firmer, the pubescence on the upper surface short like that 
on the lower and sparse or wanting down the center or occasionally glabrous on the 
upper surface; panicles averaging larger, the 
spikelets not so long-pediceled; spikelets 2.25 to 
2.4 mm. long, 1.1 mm, wide, obovate-elliptic, 
obtuse, or slightly pointed, pubescence as in 
P. villosissimum, second glume slightly shorter 
than the fruit at maturity; fruit 1.9 mm. long, 
Imm. wide, elliptic, subacute. 
Autumnal form usually stiffly spreading, some- 
Fig. 249.—P. pseudopubescens. From times prostrate, culms sparingly branching from 
type specimen, the lower and middle nodes alter the maturity of 
the primary panicle, less freely branching than 
P. villosissimum, the upper surface of the reduced blades usually glabrous except 
along the margins and at the base; winter leaves as in P. villosissimum. 
This species is very closely allied to P. villosissimum and occasional specimens 
are about as close to one type as to the other. In these cases the ascending, more 
silky pubescence of the culms and less pubescent or glabrous upper surface of the 
blades, together with the stiffer habit, have been used to distinguish P, pseudopu- 
bescens. 
DISTRIBUTION, 
Sandy, open woods, Connecticut to Illinois, south to Florida and Mississippi; also 
in Mexico. 
Connecticut: South Britain, Harger 6031 (Bissell Herb.). 
New Jersey: Atsion, Chase 3566; Camden, Smith; Wildwood Junction, Chase 
3520. 
Outro: Cedar Point, Claassen (Gray Herb.). 
InpIANA: Miller, Chase 1542, Umbach in 1898; Clark, Umbach 1685; Clark Junc- 
tion, Bebb 514, 2882; Dune 
Park, V. H. Chase 291, Hill 100 
and 101 in 1905, Umbach 1080. 
Intros: Starved Rock, Chase 
1605; Hanover, Gleason 
Gates 2535, 2539, 2575. 
MicHIGaANn: Saginaw Bay, Morris 
240 in part; Twin Lakes, 
Wheeler in 1900. 
MARYLAND: Caroline County, Nor- 
ton in 1907. 
District or CoLumBra: Steele in VG, 250,—Distribution of P. pseudopubescens. 
1899. 
Nortu Carortna: Roanoke Island, Ashe in Curtiss Pl. So. U. 8. 6452, Chase 
3218, 3222; Wilmington, Chase 3109, 3115, 3147, 3160, [Hitchcock 1437, 1474, 
1476, 1484, 1485; Biltmore, Boynton in 1906. 
SourH CaRo.ina: Orangeburg, Hitchcock 398, 1380, 1383, 1394, 1401, 1402; 
Fripps Island, Cuthbert 1164. , 
Georata: Stone Mountain, Hitchcock 397, 1356, 1357. 
Fioripa: Lake City, Hitchcock 10134. 
TENNESSEE: Ducktown, Chambliss 26. 
