118 GEAMINEAE (GRASS FAMILY) 



drooping ; spikelets lotuj-awned, the awn sometimes as much as 5 cm. long. — 

 {Panicum fursh; P. hispidum Muhl. ) — Marshes and ditches chiefly near the 

 coast, N. H. to Fla. ; and in w. Ont. and n. 111. Aug. -Oct. 



3. E. coI6na (L.) Linlc. (Jungle Eice.) Tufted, erect or ascending, spar- 

 ingly branched, 3-6 dm. high ; sheaths and blades smooth ; panicle of 5-10 

 dense racemes (1-6 cm. long) rather distant and racemose along the axis; spike- 

 lets about 3 mm. long ; glumes and sterile lemma pubescent, mucronate-pointed 

 but not awned. (^Panicum L. ) — Ditches and low ground, Va. and Kan., south w. 

 (Warm regions generally.) 



14. SETARIA Beauv. Bristly Foxtail Grass 



Spikelets as in Panicum but surrounded liy few or many persistent awn- 

 like branches which spring from the rhachis below the articulation of the 

 spikelets. — Annual introduced weeds in cultivated or manured grounds, or 

 native perennials, with linear or lanceolate flat leaves and cylindrical spike- 

 like panicles. (Name from seta, a bristle.) Chaetochloa Scribn. 



Perennial by creeping rootBtocka 1. S. imierbis. 



No rO0t8tOCkB. . n CT _« 



Bristles 5 or more . 2. S. fflauca. 



Bristles 1-8. . .,, . 



Downwardly barbed , , . * 8. 3. verHcillata, 



Upwardly barbed. 

 Lemmas rufrose ; panicle not exceeding 1.5 dm. in lengtb. 



spikelets 2 mm. long i. S. virldU. 



Spikelets 8 mm. long 5. 5. itaUm. 



Lemmas smooth and shining; panicle 2-6 dm. long 6. S. magna. 



1. S. imbfirbis R. & S. Culms more or less caespitose, 3-7 dm. high, slender, 

 compressed, erect or ascending, often geniculate at base ; sheaths overlapping, 

 compressed, glabrous ; blades 1-3 dm. long, 3-7 mm. wide, attenuate toward 

 the apex ; panicle 2-5 cm. long, nearly 1 cm. thick, exclusive of bristles ; bristles 

 8-12, 5-10 mm. long, pale yellowish, sometimes purplish, upwardly scabrous ; 

 spikelets 2 mm. long ; first glume about ^ as long as the spikelet, second J-| as 

 long, acute, 5-7-nerved, the midnerve excurrent ; sterile lemma equaling the 

 elliptical-ovate acute striate transversely rugose fertile lemma. 

 — Moist soil, Ct. to Kan., and southw. (Trop. Am.) 



Var. perSnnis (Hall) Hitchc. Culms scarcely tufted, very 

 slender, wiry, 6-12 dm. high ; blades long and narrow ; pani- 

 cles 2-7 cm. long, more slender ; spikelets and bristles usually 

 purplish. {Chaetochloa versicolor Bieknell.) — Brackish 

 marshes along the coast, Ct. to Fla. ; and in saline soil, Kan. 

 and I. T. June-Sept. — Intergrades with the species. 



2. S. gla6ca (L.) Beauv. (Foxtail, Pigeon Grass.) 

 Annual ; culms branching at the base, compressed, erect or 

 69. s. glauca. ascending, 3-12 dm. high ; leaves flat, linear-lanceolate, glau- 

 tendtag bristres ''°'^® ' panicle 2-10 oin. long, about 1 cm. thick ; bristles 3-8 mm. 

 Same open, show- l0"g) upwardly scabrous; spikelets 3 mm. long; first glume J, 

 ing fertile and second | as long as the striate undulate-rugose fertile lemma. 

 reutral flower X 8. — Cultivated ground and waste places, common throughout, 

 (Nat. from Eu.) Fig. 69. 



3. S. vekticillXta (L.) Beauv. Annual, tufted ; culms 3-6 dm. high ; 

 leaves linear-lanceolate, scabrous ; panicles green, 5-10 cm. long, 

 somewhat compound, interrupted at base, tapering above ; bristles 

 stout, downwardly barbed, 3-6 mm. long; spikelets 2-2.5 mm. long ; 

 first glume J as long as the second which equals the sterile lemma 

 and slightly exceeds the abruptly apiculate obscurely transverse- 

 rugose fertile lemma. — Near dwellings, widely distributed in 

 eastern U. S. (Nat. from Eu.) Fig. 70. 



4. S. vfRinis (L.) Beauv. (Green F., Bottle Grass.) 70. 8. verticil 

 Annual, tufted; culms 2-9 cm. high; leaves 0.5-2.6 dm. long, lata. Spike 

 4-10 mm. wide, scabrous on the margins ; panicles rather thick, let x 4. 



