GEASSES. 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, ASIA. 



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 ludiis." 



Herb. Geol. Surv. Herb. Mohr. 



Chaetochloa imberbis (Poir.) Scribner, Bull. U. S. Dept. Agr. Div. Agrost. 

 4:39. 1897. 



Panicum imberbe Poir. Encycl. Suppl. 4 : 272. 1816. 



P. laevigatum Muhl. ; Ell. Sk. 1 : 112. 1817. Including variety. 



Setaria laevigata Chap. Fl. ed. 3, 587. 



Chaetochloa perennis (Curtiss) Bicknell, Bull. Torr. Club, 25 : 107. 1898. Not Setaria 

 perennis Hall. 1893. 



Chap. FL 1. c. Ell. Sk. 1. c. 



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. 



Differs from Chaetochloa glauca by the larger involucrate bristles and the base of 

 the leaf 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, pi. 328. 1898. 



Ell. Sk. 1 : 112, in part, uuder Setaria laevigata Muhl. Chap.Fl. ed. 3, 587, including 

 the typical form. Coulter, Contr. Nat. Hero. 2 : 509. 



A slender scarcely tufted perennial, 2 to 4 feet high, with slender, compressed, 

 wiry culms, which are naked below, long narrow leaves, and rather slender long- 

 exserted panicles from 1^ to 2-J inches long ; spikelets generally purplish with slender 

 yellowish or yellowish green bristles. 



WEST INDIES. 



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 2| inches long, 

 and 5 to 8 short involucrate bristles, scarcely exceeding the spikelets ; Howering 

 glume transversely undulate-rugose. 



CUBA, 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 

 No vogranatensi. ) " 



Herb. Geol, Surv. Herb. Mohr. 



