GRASSES. 361 
Type locality not ascertained. 
Economic uses: Valuable as the last. 
Herb. Geol. Surv. Herb. Mohr. 
Chaetochloa magna (Griseb.) Scribner, Bull. U. S. Dept. Agr. Div. Agrost. 4:39, 1897. 
LarGE Swamp MILLET. 
Setaria magna Griseb. Fl. Brit. W. Ind. 554. 1864. 
Chap. FI. ed. 3, 588. : 
West INprgs (BERMUDA). 
Carolinian and Lonisianian areas. On the coast from Delaware to Florida and 
Louisiana. 
ALABAMA: Coast plain. Grassy marshes, Mobile River. July. Rare. Annual. 
Type locality: ‘ Hab. Jamaica!” ' 
Chaetochloa caudata (Lam.) Scribner, Rep. Mo. Bot. Gard. 10:52. 1899. 
Panicum caudatum Lam, Tabl. Eneyel. 1:171. 1791. 
Setaria caudata Roem. & Schult. Syst Veg. 2:495. 1817. 
A slender, somewhat cespitose annual | to 2 feet high; the culm branched from 
thebase; the leaves narrowly linear; the panicle elongated (from 5 to 15 inches long), 
attenuate, few- flowered; the bristles solitary; the spikelets ovate, acute, short- 
“pedicellate. 
West Inpigs, MEXICO, SOUTH AMERICA. 
Carolinian and Louisianian areas. New Jersey, along the coast to Mississippi(?). 
Adventive from tropical America. Indigenous in Florida and sovthern Texas. 
ALABAMA: On ballast heaps. Mobile (1891).(?) 
Type locality: ‘‘E Brasilio. Commers. & Cayeuna. D. Richard.” 
Herb. Geol. Surv. Herb. Mohr. 
CENCHRUS L. Sp. Pl. 2:1050. 1753. SaNnpBUR. 
About 12 species of tropical and temperate regions of both hemispheres. 
Cenchrus tribuloides L. Sp. Pl. 2: 1050. 1753. CoMMON SANDBUR. 
Cenchrus carolinianus Walt. Fl. Car. 79. 1788. 
Ell. Sk.1:93. Gray, Man. ed. 6, 634. Chap. Fl. 579. Coulter, Contr. Nat. Herb. 
2:510. Wats. Bot. Calif. 2:261. 
West INDIES, MEXICO TO BRAZIL. 
Carolinian and Louisianian areas. Eastern United States, southern California. 
ALABAMA: From the Tennessee valley to the coast, on sandy waste ground. Most 
abundant near the coast. Mobile. July to October. A pernicious weed. 
Type locality: ‘Hab. in Virginiae maritimis.” 
Herb. Geol. Surv. Herb. Mohr. 
Cenchrus macrocephalus Scribner, Bull. U. 8. Dept. Agr. Div. Agrost. 17:110, f. 
406. 1899. LARGE SANDBUR. 
Cenchrus tribuloides macrocephalus Doell in Mart. F1. Bras. 2, pt. 2:312. 1877. 
BraZIL, ARGENTINA. _ 
Carolinian and Lonisianian areas. New Jersey along the coast to Louisiana, 
ALABAMA: Littoral belt. Shifting sands. Baldwin County, eastern shore of 
Mobile Bay. Mobile County, dunes of Dauphin Island. Flowers July to October. 
Not infrequent. Annual. : : : 
Stouter than tbe last, the ascending stems 8 to 12 inches long, spikelets fully 
twice as large. : 
Type locality : Brazil. 
Cenchrus incertus M. A. Curtis, Bost. Journ. Nat. Hist. 1:135. 1837. 
SOUTHERN SANDBUR. 
Cenchrus strictus Chap. Bot. Gaz. 3:20. 1878. ’ 
Chap. Fl. Suppl. 667; ed. 3, 588. Scribner, Bull. U. S. Dept. Agr. Div. Agrost. 
17:109, f. 405. ; 
OHTA area. North Carolina along the coast to Florida and western Texas. 
ALABAMA: Coast plain to adjoining pine hills. Dry, sandy soil. Mobile and 
Baldwin counties, shores of Mobile Bay. Mobile County, Springhill. July to Octo- 
ber. Often a troublesome wayside weed. ; i 
Type locality: “West coast of Florida, Appalachicola and southward. 
Cenchrus echinatus L. Sp. Pl. 2: 1050. 1753. HEDGEHOG Grass. 
Chap. F1.578. Coulter, Contr. Nat. Herb. 2: 510. 
West Inpigs, MEXICO TO BRAZIL. F 
Louisianian area. Coast, North Carolina to Florida. 
