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. Fl. ed. 3, 5&8. 
WEsT INDIES (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 eulm 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 INpIESs, 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. & Cayenna, D. Richard.” 
Herb. Geol. Surv. Herb, Mohr. 
CENCHRUS L. Sp. P1.2:1050. 1753. SANpDBUR. 
About 12 species of tropical and temperate regions of both hemispheres. 
Cenchrus tribuloides L. Sp. P].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 INpIES, 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. Fl. 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 the 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. 
172109, f. 405, 
Louisinnian area. North Carolina alone 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. 
Type locality: ‘West coast of Florida, Appalachicola and southward.” 
Cenchrus echinatus L. Sp. Pl. 2: 1050. 1753. HEDGEHOG GRags. 
Chap. F1.578. Coulter, Contr. Nat. Herb. 2:510. 
West INDIES, MEXICO TO BRAZIL. 
Louisianian area. Coast, North Carolina to Florida. 
