J918] The Grasses op Illinois 383 



EragTostis pectinacea (Miclix.) Nees 

 Purple Eragrostis (Fig. 216) 



Port pectinacea, Michaux '03, 69; Engelmann '44, 104. Eragrostis specta- 

 bilis, Lapham '57, 547, 581; Patterson '76, 51. Eragrostis pectinacea, Flagg '78, 

 282; Brendel '87, 64; Higley and Raddin '91, 144; Hiiett '97, 130; Gleason '07, 

 182; Gleason '10, 149. 



Culms 1 to 3 feet tall, simple ; sheaths usually sparsely pubescent 

 but often smooth, bearded at the throat ; blades 4 to 12 inches long, 4 

 to 8 mm. wide, rough above, pubescent near the base ; panicles purple, 

 large and spreading, with a conspicuous tuft of hairs in the axils, some- 

 times partially included in the upper sheaths ; spikelets on long, stiff 

 pedicels, 5- to 15-flowered, 3 to 8 mm. long; lemmas 1.5 to 2 mm. long. 



This grass is very conspicuous in the autumn, with its large purple 

 panicles. These often break off and blow before the wind like tumble- 

 weeds. It prefers dry soil. 



ILLINOIS SPECIMENS: Without locality. Hall; ■without locality, Vasey. cass 

 CO. Chandlerville, Seymour, Aug., 1886. champaign co. Urbana, Clinton, Aug., 

 1895; Urbana, Kosher, Oct., 1912. fulton co. Without locality, Fepoon. jo 

 DAVIESS CO. Without locality, Pepoon 413. Henderson co. Oquawka, Patterson 

 in 1872. MACOUPIN co. Carlinville, Bobertson. mason co. Sand hills, Wolf ; 

 Manito, Wilcox, July, 1902. menard co. Athens, Ball, Sept., 1861 and 18G4. 

 ogle co. Oregon, Woitc, Aug., 1884. peoria go. Peoria, McDonald, Aug., 1887, 

 1900 and 1905; Peoria, Brendel; Princeville, V. H. Chase 757. union co. Cob- 

 den, Seymour, Oct., 1881. wabash co. Without locality, SchnecJc, Aug., 1880; 

 without locality, Shearer; Mt. Carmel, Schneclc, Aug., 1880. 



Eragrostis pilosa (L.) Beauv. 

 (Fig. 217) 



Lapham '57, 547, 580; Babcock '7.3, 97; Patterson '76, 51; Flagg '78, 281; 

 Higley and Raddin '91, 144; Huett '97, 130. 



Culms erect, branched at the base, 6 to 18 inches tall; sheaths with 

 loug hairs at the throat, otherwise smooth ; blades 1 to 5 inches long, 2 

 to 3 mm. wide ; panicle open but rather narrow, usually a tuft of long 

 hairs at the base of the lower branches ; spikelets narrow, 5- to 18-flow- 

 ered, 4 to 9 mm. long; lower lemmas 1.5 mm. long. 



This is the commonest species of Eragrostis in Illinois; it is found 

 in waste places everywhere. 



ILLINOIS SPECIMENS: Without locality, Vasey. cass co. Chandlerville, 

 nail, Aug., 1880. champaign co. Urbana, Clinton, Sept., 1895; Urbana, Moshcr, 

 Oct., 1913; Champaign, Clinton, Sept., 1899; Champaign, Seymour, July, 1880. 

 cook CO. Riverside, Moffatt, Aug., 1891; Evanston, Johnston, Aug., 1889; Rn- 

 venswood, Chicago, Gates, Aug., 1906; Hyde Park, Chicago, A. Chase, Aug., 1899; 

 Chicago, Babcock, Sept., 1874. jo daviess co. Without locality, Pepoon 927. 

 KANE CO. Elgin, Sherff 1791. kankakee co. Kankakee, De Selm, Aug., 1913. 

 MCHENRY CO. Ringwood, Vasey; Algonquin, Nason, Aug., 1879. macon CO. 

 Decatur, CloJcey, Aug., 1897. macoupin CO. Carlinville, Piobertson, July, 1879. 

 MENARD CO. Athens, Tlall in 1862 and 1864. peoria CO. Peoria, Brendel in 

 1859; Peoria, McDonald, Aug., 1887. piatt CO. Deland, Seymour, Sept., 1889. 

 ROCK island CO. Rock Island, McDonald, July, 1893. ST. clair co. Mascoutah, 

 Wclsch. stark CO. V. U. Chase 124 and 1544. union co. Cobden, Seynwnr, 



