360 Bulletin No. 205 [March, 



Panicle generally open; spikelets 3 to 3.5 mm. long; lemma smooth, the callus 

 hairs about as long as the lemma. C. canadensis 



Panicle narrow, constricted; spikelets 4 to 4.5 mm. long; lemma rough, callus hairs 

 about three-fourths as long as the lemma. C. inexpansa 



CalamagTOstis canadensis (Michx.) Beauv. 

 Blue- joint Grass (Fig. 173) 



Lapham '57, 545, 568 (Plate 1, Fig. 11); Babcock '73, 97; Patterson '7G, 50; 

 Flagg '78, 280; Bremlel '87, 63; Higley and Raddin '91, 130; Huett '97, 130; 

 Gates '12, 355; Sherff '12, 419; Shcrff '13, 594. 



Culms 2 to 5 feet tall, smooth or slightly rough ; sheaths smooth ; 

 blades 6 to 18 inches long, 2 to 8 mm. wide, rough; panicle usually 

 widely spreading, but sometimes with the branches erect; spikelets 3 

 to 3.5 mm. long, the lemma smooth with an inconspicuous awn, the 

 callus hairs almost equaling and concealing the lemma. 



This species is found in wet soil, such as swamps and bogs. It is 



said to make excellent hay. 



ILLINOIS specimens: Without locality. Mead; Maynard, A. Chase, June, 1898. 

 CHAMPAIGN CO. Champaign, Seymour, June, 1884; Champaign, Waite, June, 1886. 

 COOK CO. Bryn Mawr, Meyers, 1910; Beverly Hills, Eobert Bebh, Aug., 1904; 

 Chicago, Balcocl'., Aug., 1872. JO daviess CO. Without locality, Pepoon 48. 

 HANCOCK CO. Augusta, Mead in 1843. Henderson co. Oquawka, Patterson. 

 KANKAKEE CO. Kankakee, Hill, June, 1870. lake co. Lake Villa, Gleason and 

 Shohe 116, 146, 224, LIVINGSTON co. Emington, Wilcox, July, 1902. mchenrt 

 CO. Ringwood, Vasey. macoupin co. Carlinville, Boiertson, July, 1883 and 



1884. MENARD CO. Athens, Hall, June, 1866. ogle co, Oregon, Waite, July, 



1885, PEORIA CO. Princeville, F, H. Chase, 1897; Peoria, Brendel; Akron, V. H. 

 Chase, June, 1897. ST. clair co. Mascoutah, Welsch. white co. Carmi, 

 SchnecTc, June, 1897. winnebago co. Without locality, M. S. Bebb; Fountain- 

 dale, M. S. Bell. 



Calamagrostis inexpansa Gray 

 Bog Reed Grass (Fig, 174) 



Culms slender, 2 to 4 feet tall ; sheaths smooth ; blades rough, 

 8 to 12 inches long, 4 mm. wide or less ; panicle narrow but not very 

 densely flowered; spikelets 4 mm. long, awns short, lemma rough, 

 callus hairs about two-thirds the length of the lemma. 



This species is found in low, wet places. 



cook CO. Hyde Park, Chicago, Balcoclc, July, 1873. 



Calamagrostis cinnoides. — This species has been reported by Lap- 

 ham (0. coarcfata, '57, 545, 568) and by Flagg (C. nuttalliana, 78, 

 280) . No specimens of this have been seen by the writer. 



30. AMMOPHILA Host 



The only species in this genus is a stout perennial with strong, 

 creeping rootstocks. It is found along the shores of Lake Michigan, 

 Avhere it acts as a sand binder. This grass is able to push up to the 

 surface again after being covered by shifting sand. The inflorescence 



