HITCHCOCK REVISIONS OF NORTH AMERICAN GRASSES. 



199 



Setaria setosa /3 caudata Griseb. Fl. Brit. W. Ind. 555. 1864. Based on Panicum 

 cyudatum Lam. 



Pennisetum swartzii F. Muell. Fragm. Phyt. Austr. 8: 110. 1873. Based on Panicum 

 setosum Swartz (not Pennisetum setosum L. Rich.). 



Chamaeraphis setosa Kuntze, Rev. Gen. PI. 2: 768. 1891. Based on Panicum 

 setosum Swartz. 



Chamaeraphis setosa a caudata Kuntze, Rev. Gen. PL 2: 769. 1891. Based on 

 Panicum caudatum Lam. 



Chamaeraphis caudata Britton, Ann. N. Y. Acad. 7: 264. 1893. Based on Panicum 

 caudatum Lam. 



Fig. 56. — Chaetochloa setosa. From Hitchcock 9846, 

 Jamaica; typical form. 



Fig. 57. — Chaetochloa setosa. From Chase 6519, Porto Rico; 

 open-panicked form (Panicum brachiatum) . 



Chaetochloa setosa Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 4: 39. 1897. Base-1 

 on Panicum setosum Swartz. 



Chaetochloa caudata Scribn. Rep. Mo. Bot. Gard. 10: 52. 1899. Based on Panicum 

 caudatum Lam. 



Setaria paractaenoides Urban, Repert. Nov. Sp. Fedde 15: 98. 1917. Based on 

 Panicum paractaenoides Trin. 



DESCRIPTION. 



Plants perennial; culms erect, spreading, or decumbent at base, often wiry, some- 

 times prostrate and woody at base, with upright branches, glabrous, scabrous below 

 the panicle, sometimes hispidulous about the nodes, mostly not over 1 meter tall; 

 sheaths glabrous or rarely pubescent, the lower often keeled, often overlapping, ciliate, 

 hispidulous or rarely glabrous on the collar; ligule densely ciliate, about 1 mm. long; 

 blades flat or folded, usually rather firm and stiffly spreading, glabrous beneath, 

 scabrous on upper surface, or often pubescent on both surfaces, usually 15 to 20 cm. 

 long, sometimes as much as 30 cm. long, mostly 5 to 10 mm. wide, sometimes wider; 



