396 Bulletin No. 205 [March, 



usually partially closed ; blades 6 to 12 inches long, 4 to 10 nun. wide, 

 I'ough above, smooth beneath ; panicle 4 to 8 inches long, often purple, 

 the branches usually drooping, spikelets 3- to 7-flowered, 3 to 4 mm. 

 long; lemmas distinctly 7-nerved, about 1.5 mm. long. 



This is one of the native grasses much liked by stock and could be 

 introduced into damp pasture lands. The office of Poisonous Plant 

 Investigations, U. S. Dept. of Agriculture, has found it to contain a 

 small quantity of hydrocyanic acid, enough to be poisonous if a quan- 

 tity of the grass is eaten. It is common in Illinois in most situations. 



ILLINOIS SPECIMENS: Without locality, Vasey. champaign CO. Champaign, 

 Waite, June, 1888; Mahomet, Clinton, Oct., 1898; Champaign, Waite, June, 1886; 

 Urbana, Clinton, Sept., 1899; Urbana, Seymour and Butts, June, 1880. chris- 

 tian CO. Taylorville, Andrews, cook CO. Chicago, Bahcock, July, 1869; Evans- 

 ton, Shipman, Sept., 1875; Lake Forest, Jensen, June, 1895; near Chicago, Mc- 

 Donald, June, 1891. jo daviess go. Without locality, Pepoon 683. kankakee 

 CO. Kankakee, Hill, May, 1870. Henderson co. Oquawka, Patterson, Juno, 

 1872. lake CO. Beach Area, Gates 2810. mchenry co. Algonquin, Nason, 

 MACOUPIN CO. Carlinville, Eobertson, June, 1882. madison co. Venice, Eggert, 

 July, 1877. MARION CO. Without locality, Lapham. menard co. Without local- 

 ity, Hall in 1861. peoria co. Peoria, Brendel; Peoria, McDonald, Aug., 1896. 

 ST. CLAIR CO. Mascoutah, Welsch. vermilion co. Muncie, Masher, May, 1914. 

 WABASH CO. Without locality, Schneclc, July, 1888; -nithout locality. Shearer; 

 Paton, Schneclc, July, 1879. 



Panicularia septentrionalis Hitchc. 

 Floating Manna Grass (Fig. 244) 



Glyceria fluitans, Lapham '57, 546, 577; Babcock '73, 97; Patterson '76, 51; 

 Flagg '78, 281; Brendel '87, 63; Higley and Eaddin '91, 145; Huett '97, 130. 

 Glyceria septentrionalis, Sherff '12, 417; Sherff '13, 595. 



Culms erect, 3 to 6 feet tall, usually large, soft, and spongy ; lower 

 sheaths overlapping, the upper closed nearly to the summit ; ligule 5 

 or 6 mm. long ; blades 4 to 9 inches long, 6 to 8 mm. Avide ; slightly 

 rough ; panicles very narrow, the branches erect or appressed, some- 

 times spreading in flower; spikelets 7- to 12-flowered, 20 to 25 mm. 

 long, nearly sessile ; lemmas rough all over, 4 to 4.5 mm. long. 



This species is found in shallow water Avith the leaves floating, or 

 Avhere there is very wet soil. It is an excellent grass for swampy 

 meadows. Cattle are very fond of it. 



ILLINOIS SPECIMENS: Without locality, Vascy ; northern Illinois, Tascy; 

 southern Illinois, Lc-pham. champaign co. Eantoul, Clinton, Sept., 1897. chris- 

 tian CO. Taylorville, Andreics. cook co. Chicago, Moffatt, July, 1891; Evans- 

 ton, Shipman, Sept., 1875; Chicago, Scammon, July, 1859. du page co. Without 

 locality, along ditches, Moffatt, July, 1891. Henderson co. Oquawka, Patter- 

 son, July, 1872. KANKAKEE CO. Bourbonnais, Hill, July, 1873. lake CO. Gil- 

 mer, Gates 1712; Lake Zurich, Hill, June, 1899. mchenry CO. Eingwood, Vasey. 

 MACOUPIN CO. Macoupin, Eobertson, July, 1883. menard CO. Without locality, 

 Hall in 1861. peoria CO. Peoria, Brendel. piatt CO. Monticello, Seymour and 

 Waite, July, 1880. ST. clair co. Mascoutah, Welsch. stark co. Wady Petra, 

 V. H. Chase, July, 1898. wabash co. Without locality, Schneclc, July, 1900; 

 without locality. Shearer; Mt. Carmel, Schneck, July, 1879. will co. Joliet, 

 Skeels, June, 1904. 



