Ske bre ee Misi "TN 
1901] Scribner & Merrill, — New England Panicum I2I 
F. Williams, Nov. 20, 1898, also E. F. Williams, M. L. Fernald, 
Nov. 21, 1898; Dorchester, Mattapan, 7. R. Churchill, Aug. 2, 1884 ; 
West Quincy, path to “ crag,” Blue Hill, 7. R. Churchill, July 11, 
1891. Boston, new land “introduced plant" C. W. Swan, Sept. 29, 
1886, Back Bay Park, C. W. Swan, Sept. 9, 1888; Malden, Middle- 
sex Fells, Z S. Collins, July 4, 1887 ; Nantucket, C. W. Swan, July, 
1886; Winchester, C. W. Swan, July. 19, 1890. CONNECTICUT: 
Waterford, dry, sandy woods, Fog Plain, 85, C. B. Graves, July 9, 
: 1898. 
— — Whole plant more or less pubescent. 
|| Spikelets 2 mm. long. 
30. PANICUM ATLANTICUM Nash, Bul. Torr. Bot. Club, 24: 346. 
1897. (Panicum haemacarpon, Ashe, Journ. E. Mitch. Sci. Soc. 15: 
55. 1898.)—A slender erect, much-branched perennial, 3 to 5 dm- 
high, with culm, sheaths, and erect linear lanceolate leaves, papillate. 
pilose with long, white, spreading hairs. Nodes bearded with spread- 
ing hairs, with a naked ring about 1 mm. wide below each node. 
Sheaths shorter than the internodes ; ligule a ring of hairs 2 to 5 mm. 
long ; leaf-blades erect, rigid, thickish, 3 to 1o cm. long, 4 to 7 mm. 
wide, acuminate, scabrous on the margins.  Panicles ovate or orbic- 
ular, 4 to 7 cm. long, 3 to 7 cm. wide, its main axis somewhat pil- 
ose at the base. Spikelets many on long hispidulous pedicels, obo- 
vate, 2 mm. long, obtuse ; first glume about one-half as long as the 
spikelet, ovate, acute; second and third glumes equal, densely pu- 
bescent with short spreading hairs. 
General distribution: in dry open woods, Massachusetts to Indi- 
ana, and Missouri, south to Mississippi, June to August. 
MassacHusETTS: Boston, Parker Street, C. W. Swan, June r9, 
1885; Framingham, Æ. C. Smith, June 29, 1898. CONNECTICUT: 
Franklin, dry wooded hillsides, Ayer's Gap, 14 C. B. Graves, July 3, 
1899. 
| || Spikelets about 1.5 mm. long. 
+ Plants pubescent with spreading white hairs. 
31. PANICUM UNCIPHYLLUM Trin. Gram. Pan. 242. 1826. (Panicum 
pubescens of American authors, not of Lamarck). 
An erect or ascending, caespitose, at length much branched pubes- 
cent perennial, 3 to 8 dm. high, with lanceolate leaves, exserted 
ovate panicles and pubescent spikelets. Culms pilose with weak 
hairs; nodes sparingly bearded or smooth; sheaths striate, loose, 
usually shorter than the internodes, pilose with spreading or ascend- 
ing hairs; ligule a long-ciliate fringe; leaf-blades ascending, firm or 
even rigid, acuminate, slightly narrowed at the rounded or truncate 
base, densely pubescent beneath, with short spreading hairs, smooth 
above or often with scattered papillate hairs, 4 to ro cm. long, 5 to 12 
