GRASS FAMILY. 213 
7. Panicularia pallida (Torr.) Kuntze. Pale Manna-grass. (Fig. 490.) 
Windsoria pallida Torr. Cat. N. Y. 91. 1819. 
Glyceria pallida Trin. Bull. Acad. Sci. St. Petersb. 1: 
68. 1836. = 
Panicularia pallida Kuntze, Rev. Gen. Pl. 783. 1891. 
Pale green, culms 1°-3° long, assurgent, simple, 
smooth and glabrous. Sheaths loose, shorter than 
the internodes; ligule 2’/-3’’ long, acute; leaves 
2/-6’ long, 1/’-2’’ wide, smooth beneath, rough 
above; panicle 114’-7’ in length, the branches 
spreading, ascending or rarely erect, often flexu- 
ous, 1’-2’ long; spikelets 4-8-flowered, 214//-3 4’’ 
long; empty scales unequal, the first 1-nerved, ob- 
tuse, shorter than the 3-nerved and truncate sec- 
ond; flowering scales 114’’-1%’’ long, truncate 
and denticulate at the apex, sharply and distinctly 
7-nerved, with plain furrows between the nerves. 
In shallow water, New Brunswick to Ontario, south 
to Virginia, Tennessee and Indiana. Ascends to 2000 
ft. in Pennsylvania. July—Aug. 
8. Panicularia fluitans (1,.) Kuntze. Floating Manna-grass. (Fig. 491.) 
Festuca fluitans V,. Sp. Pl. 75. 1753. 
Glyrceria fluitans R. Br. Prodr. Fl. Noy. Holl. 1:179. 1810. 
Panicularia fluitans Kuntze, Rey. Gen. Pl. 782. 1891. 
Culms 2°-5° long, flattened, erect or decumbent, 
usually stout, simple, smooth and glabrous, often root- 
ing from the lower nodes. Sheaths loose, generally 
overlapping, smooth or rough; ligule 2//-3’’ long; 
leaves 5/-1° long or more, 2//-6’’ wide, scabrous, 
often floating; panicle 9’-1%4° long, the branches, at 
least the lower ones, at first appressed, later ascend- 
ing, and 3/-6’ long; spikelets linear, 7-13-flowered, 
4//-12/’ long; empty scales unequal, I-nerved, the 
lower acute or obtuse, the upper obtuse or truncate; 
flowering scales 114//-3/’ long, oblong, obtuse or 
truncate, more or less scabrous, sharply 7-nerved. 
In wet places or in water, Newfoundland to British 
Columbia, south to New Jersey, Kentucky, Iowa and 
California. Alsoin Europe, July-Sept. 
9. Panicularia acutiflora (‘Torr.) Kuntze. 
Sharp-scaled Manna-grass. (Fig. 492.) 
Glyceria acutifiora Torr. Fl. U. S. 1: 104. 1824. 
Panicularia acutifiora Kuntze, Rey. Gen. Pl. 782. 1891. 
Culms 1°-2° tall, flattened, erect from a decumbent 
base, simple, smooth and glabrous. Sheaths loose, 
generally a little exceeding the internodes, smooth 
and glabrous; ligule 2’ long, truncate; leaves 3/—6/ 
long, 2/’-3/’ wide, smooth beneath, rough above; 
panicle 6’-12’ in length, the branches erect or ap- 
pressed, 2’-4’ long; spikelets linear, 5-12-flowered, 1/— 
134’ long; empty scales acute, smooth; flowering 
scales about 4/’ long, lanceolate, acute, scabrous, ex- 
ceeded by the long-acwminate palets. 
In wet places, Maine to southern New York, Ohio and 
Tennessee. Local. June-Aug. 
