HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 



DISTRIBUTION. 



Fig. 218. — Distribution of P. albemarlense. 



Low sandy woods or open ground of the Coastal Plain, Contiecticut to^ Michigan and 

 south to North Carolina. 



Massachusetts: 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, 



John in 1904 (Phila. Acad. 



Herb.). 

 Indiana: Dune Park, Hill 53 in 



1907. 

 Michigan: Cass County, Pepoon 



in 1904. 

 Maryland: Chesapeake Beach, 



Hitchcock 1612; Chesapeake 



Junction, Hitchcock 2409; Beltsville, Chase 3745, 3757, 3762, 3825; Pindell, 



Hitchcock 1628. 

 District of Columbia: Hitchcock 126, Kearney 27. 

 Virginia: Cape Henry, CAase 2339. 

 North Carolina: Washington, Ashe in 1899; Scran ton. Chase 3201; Beaufort 



and Hyde counties, Ashe. 

 Tennessee: Tullahoma, Biltmore Herb. 9953c (Biltmore Herb.). 



123. Panicum. implicatum Scribn. /> , iC-^^, ^ 



Banicum, implicatum Scribn^U. S. Dept. Agr. Div. Agrost. Bull. 11: 43./.^. 1898. 

 "Low marshy ground. Cape Elizabeth, Maine. Collected by F. Lamson-Scribner, 

 July 26, 1895." The type, in Hitchcock's 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 3: 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 intemodes, 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 haii-s; 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- 

 mens tangled and the lower drooping; spikelets 1.5 mm. 

 long, 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. 



Fig. 219 .—P. implicatum 

 type specimen. 



From 



