GRASSES, 359 
Setaria glauca Beauv. Agrost.51. 1812. 
Ell. Sk.1:112. Gray, Man. ed. 6,634. Chap. Fl. 578. Coulter, Contr. Nat. Herb. 
2:509. Wats. Bot. Calif. 2: 260. 
Europe, Asta, 
Canadian zone to Louisianian area. Naturalized and widely distributed from 
Canada to the Gulf of Mexico and from the Atlantic to the Pacific coast. 
ALABAMA: Over the State. Cultivated and waste places. July, October. A com- 
mon weed; annual. 
Type locality: ‘‘Hab. in Indiis.” 
Herb. Geol. Surv. Herb. Mohr. 
See ae imberbis (Poir.) Scribner, Bull. U. S. Dept. Agr. Div. Agrost. 
739. 7. 
Panicum imberbe Poir. Encycl. Suppl. 4: 272. 1816. 
P. laevigatum Muhl.; Ell. Sk.1:112. 1817. Including variety. 
Setaria laevigata Chap. FI. ed. 3, 587. 
Chaetochloa perennis (Curtiss) Bicknell, Bull. Torr. Club, 25: 107. 1898. Not Setaria 
perennis Hall. 1893. 
Chap. Fl.l.c. El. Sk.1c. 
WEST INDIES, MExIco, SOUTH AMERICA, 
Carolinian and Louisianian areas. New Jersey to Florida, Texas, and New Mexico. 
ALABAMA: Central Pine belt and Central Prairie region. Swampy places. Tus- 
caloosa County. Apparently rare. July to September. Annual. 
Ditters from Chaetochloa glauca by the larger involucrate bristles and the base of 
theleaf blade and throat of the sheath destitute of hairs. Heretofore confounded 
with the following variety. The distribution of the species is difficult to designate. 
Type locality: ‘‘In America septentrionali et Brasilia.” 
Herb. Geol. Surv. Herb. Mohr. 
Chaetochloa imberbis perennis (Hall) Scribn. & Merrill, Bull. U. S. Dept. Agr. 
Div. Agrost. 21:12. 1900. PERENNIAL SEASIDE PIGEON GRASS. 
Setaria perennis Hall, Trans. Kans. Acad. Sci. 13:102. 1893. Not Chaetochloa 
perennis Bicknell, Bull. Torr. Club, 25:107. 1898. 
Chaetochloa versicolor Bicknell, Bull. Torr. Club, 25: 105, pl. 328. 1898. 
EL. Sk. 1:112, in part, under Setaria laevigata Mubl. Chap.Fl. ed. 3, 587, including 
the typical form. Coulter, Contr. Nat. Herb. 2 :509. 
A slender scarcely tufted perenuial,2 to 4 feet high, with slender, compressed, 
wiry culms, which are naked below, long narrow leaves, and rather slender long- 
exserted panicles from 14 to 2}inches long; spikelets generally purplish with slender 
yellowish or yellowish green bristles. 
WEstT INDIKs. 
Carolinian and Louisianian areas. From southern New England (Connecticut) to 
southern Florida, Mississippi, Louisiana, in saline marshes along the coast. West- 
ward in alkaline and saline bottoms in Kansas and Indian Territory. 
ALABAMA: Littoral region, Brackish swamps and salt marshes. Mobile and 
Baldwin counties. One of the most common grasses of the salt marshes with the 
black rush, Juncus roemerianus. July to October. 
Distinguished from the typical form, with which it has been until lately con- 
founded by the more slender habit of growth, the tall culms naked near the base 
of the leaves, and the more or less purplish spikelets. 
Type locality: ‘(Alkaline and saline bottoms in central and southwestern Kansas.” 
Herb. Geol. Surv. 
Chaetochloa gracilis (H. B. K.) Scribn. & Merrill, Bull. U.S. Dept. Agr. Div. Agrost. 
21:15. 1900. 
Setaria gracilis H. B. K. Nov. Gen. et Sp.1:109. 1815. 
S. imberbis Roem. & Schult. of authors. 
A slender, smooth, cespitose perennial 12 to 20 inches high from a creeping root- 
stock, with linear, setaceous leaves, slender spike-like panicles 1 to 24 inches long, 
and 5 to 8 short involucrate bristles, scarcely exceeding the spikelets; flowering 
glume transversely undulate-rugose. 
Cusa, MEXICO. 
Louisianian area. Florida to Texas. 
ALABAMA: Mobile. Not rare on ballast heaps, and firmly established in damp to 
wet places at the mouth of the Mobile River. July to September. Adventive from 
the tropics; perhaps indigenous to southern Texas. ; 
Type locality: ‘‘Crescit * * * inter Fusagasuga et Pandi ~ * *~ (Regno 
Novogranatensi.)” 
Herb. Geol, Surv. Herb. Mohr. 
