100 Rhodora [May 
Connecticut: South Glastonbury, 9 Francis Wilson, Aug. 23, 
1892. 
3. PANICUM HUMIFUSUM (Pers.) Kunth, Rev. Gram. 1: 33. 1835. 
(Digitaria humifusa Pers. Syn. I: 85. 1805; Panicum lineare Krock. 
Fl. Sil. 1:95. 1787, not Linn. 1762; Syntherisma glabra Schrad. 
Fl. Germ. 1: 163. 1806: Panicum glabrum Gaud. Agrost. 1: 22. 
1811; Paspalum ambiguum D. C. Fl. Gall. 123. 1806; Syntherisma 
linearis Nash, Bul Torr. Bot. Club, 22: 420. 1895. Syatherisma 
humifusa Ryd. Mem. N. Y. Bot. Gard. 1: 469. 1900.) 
A slender, glabrous, at length much branched below, and prostrate 
annual 2 to 5 dm. high, with flat leaves and 2 to 6 slender, diverging 
spikes which are 2 to 8 cm. long. Sheaths flattened, glabrous ; ligule 
a scarious ring about 2 mm. long; leaf-blades r.5-13 cm. long, 
2.5-6 mm. wide, erect or nearly so, glabrous. Racemes alternate 
or approximate in pairs, the rachis triangular, the lateral angles 
broadly winged, hispidulous on the margins. Spikelets slightly over 
2 mm. long, elliptic, acutish, usually in pairs; outer glumes usually 
purplish, the first generally obsolete ; second and third glumes about 
equal in length, slightly shorter than the flowering glume, pubescent 
with appressed hairs on the margins and internerves, the second 3- 
nerved, the third 7-nerved; flowering glume deep chestnut brown 
when mature, striate, acute. 
General distribution: in cultivated grounds and waste places, Nova 
Scotia to Ontario and Minnesota, south to Louisiana, July to Septem- 
ber. Introduced from Europe. 
Maine: North Berwick, 7. C. Parlin, Aug., 1891 and Aug. 25, 
1892. Bradley, sandy river bank, W. Z. Fernald, Sept. 16, 1897; 
Orono, waste places, M. Z. Fernald, July 30, 1889; Mattawam- 
keag, railroad yard, M. Z. Fernald, Sept. 14, 1898; East Auburn, 
lawns, Æ. D. Merrill, Aug. 12, 1896; South Poland, Aate Furbish, 
no date; Peru, /. C. Parlin, Sept., 1886. NEW HAMPSHIRE: Jaffrey, 
dry roadsides, 599 B. Z. Robinson, Aug 29, 1898. MASSACHUSETTS, 
Plymouth, Oakes, no date; West Cambridge, clay pit, E. 7. Williams, 
Aug. 28, 1897; West Quincy, W. Z. Rich, Sept. 3, 1894; Chelms- 
ford, C. W. Swan, Aug. 22,1882 ; Cambridge, lawn, W. Deane, Aug. 
28, 1883; Andover, 7. Blake, June 21, 1883 ; Lynnfield, wood-road, 
W. P. Rich, Aug. 21, 1892; Dedham, low ground by railroad W. P. 
Rich, Aug. 22, 1897; Waltham, sandy ground, W. P. Rich, Sept. 2, 
1889; Dorchester, /. Æ. Churchill, Sept. 7, 1884; Nonquit, Æ. L. 
Sturtevant, Sept. s, 1888. Connecticut: New Haven, J. A. Allen, 
Sept. 30, 1877. 
S II. EUPANICUM. 
Spikelets awnless, all pedicellate in panicles, the branches of which 
are single or fascicled, usually naked below, spreading, or sometimes 
erect. 
