1918] The Grasses of Illinois 325 



CHAMPAIGN CO. Urbana, Clinton, Aug., 1895; Urbana, Seymour, July, 1880; 

 Urbana, Masher in 1914. cook co. Chicago, A. Chase 1198. kankakee go. 

 Kankakee, Beecher, July, 1908; Kankakee, Hill, Aug., 1870. lake co. Channel 

 lake, Sflynes, Aug., 1905. peoria co. Peoria, McDonald, July, 1900; Peoria, 

 Brendel. wabash co. Mt. Carmel, Schneck, July, 1905. 



Chaetochloa lutescens (Wiegcl.) Stiintz 

 Yellow Foxtail. Pigeon Grass (Figs. 100 and 101) 



Setaria glauca, Lapham '57, 548, 597 (Plate 4, Fig. 5); Patterson '76, 52; 

 riagg '78, 284; Higley and Eadtlin '91, 140; Huett '97, 129; Gleason '10, 14S. 

 Chaetochloa glauca, Britton '07, 89. 



Culms branching at the base, usually erect, or often spreading, 

 1 to 4 feet long ; sheaths and blades smooth, the blades 2 to 6 inches 

 long, 5 to 15 mm. wide ; panicle 1 to 3.5 inches long, 1 cm. or less wide ; 

 spikelets 3 mm. or more in length, bristles 5 or more, tawny yellow, 

 upwardly barbed. 



Yellow foxtail is one of the worst weeds of the cornfield, or in 

 fact of most grain fields. It comes up in the field after cultivation 

 has been discontinued and produces enormous quantities of seed, which 

 effectively seed the field for spring. If the field is plowed in the fall 

 before the seed ripens, and thoroly cultivated the next year, a great 

 deal' of it will be destroyed. It blooms almost thruout the season and 

 can be eradicated only by frequent cultivation. Not all the seed sprouts 

 the first year ; the soil is often so full of it that it takes several years 

 to eradicate it. 



ILLINOIS SPECIMENS : Without locality, M. 8. BeM in 1868. champaign CO. 

 Without locality, Percival, Nov., 1876; Urbana, Gibbs, Sept., 1898; Urbana, Clin- 

 ton, Aug., 1895; Urbana, Seymour, July, 1881; Urbana, Burrill, Aug., 1880; Sey- 

 mour, Tson, Oct., 1913; Urbana, Moshcr, Oct., 1913. cook CO. Chicago, Lansing, 

 Aug., 1897; Chicago, Hill, July, 1895. lake co. Channel lake, Haynes, Aug., 

 1905. MACOUPIN CO. Carlinvillo, Robertson in 1881. peoria CO. Peoria, Bren- 

 del. ■ ST. CLAIR CO. Mascoutah, Welsch. stark co. Wady Petra, V. H. Chase. 



Chaetochloa verticillata (L.) Scribn. 

 Bristly Foxtail (Fig. 104) 



Setaria verticillata, Patterson '76, 52; Higley and Kaddin '91, 140. 



Culms erect or spreading,. 1 to 3 feet long; sheaths smooth; blades 

 thin, roughened on the upper surface but not hairy ; panicles much like 

 those of C. lutescens as to shape and size, green ; spikelets 2 to 2.5 mm. 

 in length, bristles 1 to 3, stout, and downwardly barbed. 



This species is a weed in waste places and around dwellings, but it 

 is not very common in Illinois. 



HENDERSON CO. Oquawka, Patterson, Sept., 1873. peoria co. Peoria, Bren- 

 del. rock island co. Moline, Seymour, Aug., 1884. stark CO. V. H. Chase, 

 Aug., 1897. 



