HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 213 
ae 523 e wy 
DISTRIBUTION. \ou Mew E (Vow 
Low sandy woods or open ground of the Coastal Plain, Connecticut te Michigan and 
south to North Carolina. 
Massacuusertts: Nantucket Island, Bicknell in 1899 and 1906. 
Connecticut: Waterford, Graves in 1898. 
New York: Garden City, Bicknell in 1906; Woodmere, Bicknell in 1902; Valley 
Stream, Bicknell in 1904; 
Hempstead, Bicknell in 1906. 
New Jersey: Grenloch, Heritage 
in 1897 (Phila. Acad. Herb.). 
PENNSYLVANIA: Woodbourne, 
Jahn in 1904 (Phila. Acad. 
Herb.). 
InpraAna: Dune Park, Hill 53 in 
1907. 
Micuican: Cass County, Pepoon 
in 1904. 
Marytanp: Chesapeake Beach, 
Hitchcock 1612; Chesapeake 
Junction, Hitchcock 2409; Beltsville, Chase 3745, 3757, 3762, 3825; Pindell, 
Hitchcock 1628. 
District or CoLtumBia: Hitchcock 126, Kearney 27. 
VirGinia: Cape Henry, Chase 2339. 
Norta Carona: Washington, Ashe in 1899; Scranton, Chase 3201; Beaufort 
and Hyde counties, Ashe. 
TENNESSEE: Tullahoma, Biltmore Herb. 9953c Ce tonee Herb.). 
Vig. 218.—Distribution of P. albemarlense. 
Lv , ° ° g 
foes Butte vive seve Wud 90 9.49% Nae A) 169 y 
. Panicum implicatum Scribn,U. 8. Dept. Agr. Dee erost. Tee . 11: 43. f. 2, 1898. 
‘‘Low marshy ground, Cape Elizabeth, Maine. Collected by F. Lamson-Scribner, 
July 26, 1895.”’ The type, in ence herbarium, consists of several plants in the 
early branching state, 45 to 50 cm. high, with mature primary panicles 5.5 cm. long 
and smaller secondary ones. There is a duplicate type in the National Herbarium. 
Panicum unciphyllum implicatum Scribn. & Merr. Rhodora 8: 123.1901. Based 
on Panicum implicatum Scribn. 
DESCRIPTION. 
Vernal form with tufted, slender culms 20 to 55 cm. high, erect or ascending, papil- 
lose-pilose, with spreading hairs; sheaths shorter than the internodes, papillose- 
pilose; ligules 4 to 5 mm. long; blades firm, erect or ascending, 3 to 6 cm. long, 3 to 6 
mm. wide, rarely longer or wider, more or less involute- 
acuminate, the upper surface pilose with erect hairs 3 to 
4 mm. long, the lower surface papillose-pubescent with 
subappressed hairs; primary panicles long-exserted, py- 
ramidal in outline,*3 to 6 cm. long, about as wide, the 
axis long-pilose, the branches flexuous, in typical speci- 
oe eee See non Wis tangled and the lower cou spikelets oe 
type specimen. ong, 0.9 mm. wide, obovate, obtuse, papillose-pilose; 
first glume about one-fourth the length of the spikelet, 
obtuse; second glume and sterile lemma equaling the fruit at maturity; fruit 1.3 mm. 
long, 0.9 mm. wide, broadly elliptic, obtuse, very minutely umbonate. 
Autumnal form erect or spreading, rather loosely branching from the lower and mid- 
dle nodes, the primary culms becoming more or less geniculate below; leaves and pani- 
cles reduced; winter leaves lanceolate-ovate, pilose above; the rosette appearing late. 
