108 Rhodora [May 
14. PANICUM LINEARIFOLIUM Scribn. U. S. Dept. Agr. Div. 
Agros. Bul. 11: 42, pl. z. 1898. (Panicum depauperatum Muhl. 
Gram. 112. 1817, in part; Panicum depauperatum laxa Vasey, U. S. 
Dept. Agr. Div. Bot. Bul. 8: 29. 1889, not Panicum laxum Swartz, 
1788. 
gn S RE erect, densely caespitose grass, 2 to 4 dm. high, with 
rather long, linear leaves and open panicles 5 to 8 cm. long. Culms 
simple or branching near the base, glabrous, sheaths glabrous or 
pilose, with rather long (3 mm.) spreading hairs; ligule a dense 
fringe of hairs; leaf-blades 5 to 15 cm. long, about 4 mm. wide, 
very acute, scabrous on both sides and occasionally sparingly pilose. 
Panicle-branches solitary or in pairs, more or less spreading, often 
flexuous, scabrous. Spikelets obovate or oblong, obtuse, 2 to 2.5 
mm. long ; first glume nerveless, pilose at least near the base, broadly 
obtuse, clasping the base of the spikelet, about 0.5 mm. long ; second 
and third glumes as long as the spikelet, oblong, obtuse, 7-nerved, 
sparingly pilose; the third with a palea about half its length; flower- 
ing glume 2 mm. long, obtuse. 
General distribution : in dry soil, Maine to Missouri, southward to 
Texas. June-August. 
Maine: Orono, dry woods, M. ZL. Fernald, July, 1890 and dry, 
wooded slope, 506 M. L. Fernald, July 14, 1890; North Berwick, 
AM. L. Fernald, June 13, 1896. New HaMwPrsHIRE: Windham, Cor- 
bett's Pond, C. W. Swan, July 9, 1890. VERMONT: Burlington, Z. 
A. Jones, July 25, 1892; Moncton, C. G. Pringle, 1878 ; Manchester, 
284 M. A. Day, June 21, 1898. MassacnHusETTS: West Quincy, 
J. R. Churchill, July 4, 1891; Ashburnham, Sydney Harris, June 12, 
1896; Melrose, rocky bank of Cascade, W. P. Rich, June 16, 1895; 
Andover, J. Blake, July 21, 1882 and June 21, 1884; Boston, C. W. 
Swan, Jüne 25, 1881. CONNECTICUT: New Haven, /. A. Allen, June 
14, 1877 ; Southington, C. 77. Bissell, June 17, 1897. 
This species is similar in habit and is very closely related to Pani- 
cum depauperatum from which it is at once distinguished by its 
smaller and more obtuse spikelets. In Panicum depauperatum the 
spikelets are about 3.5 mm. long and the second and third glumes 
are decidedly longer than the flowering glume and more prominently 
nerved, the first glume being distinctly r- and occasionally 3-nerved, 
the second usually 9-nerved. When dry the spikelets in 7. de- 
pauperatum have the appearance of being slightly beaked, while in 
P. linearifolium they are distinctly obtuse. 
* * Leaves usually spreading, extremely variable, lanceolate or linear lance- 
olate, rounded, truncate or clasping at the base. 
+ Panicles strict, narrow, the branches erect. 
15. PANICUM XANTHOPHYSUM A. Gray, Ann. Lyc. N. Y. 3: 234. 
1835; Gram. & Cyp. 1: no. 28. (Panicum calliphyllum | Ashe, 
Journ. E. Mitch. Sci. Soc. 15 : 31. 1898.) — A rigid erect, light green 
