HITCHCOCK AND CHASE — GRASSES OF THE WEST INDIES. 371 



1. Polypogon monspeliensis (L.) Desf. Fl. A limit. 1: 67. 1798. 

 Alopccurus monspeliensis L. Sp. PI. 61. 1753. 



A low, weedy annual with inflated .sheaths and dense silky-awnod oblong 

 heads. 



Waste places, introduced from Alaska to Mexico and occasionally in other 

 parts of America ; also in Bermuda. A native of the Old World. Originally 

 described from Montpellier, France. 



2. Polypogon littoralis (With.) J. E. Smith, Comp. Fl. Brit. 13. 1800. 

 Agrostis littoralis With. Bot. Arr. Veg. Brit. ed. 3. 2: 129. 1796. 



A spreading perennial rooting at the nodes, the panicles less dense and less 

 pilky than those of the preceding species. Moist places, introduced from Europe 

 into the warmer parts of America. Found in Bermuda. Originally described 

 from Great Britain. 



69. AGROSTIS L. 



Spikelets paniculate ; glumes awnless, exceeding the lemma ; palea in most 

 species wanting. 



Palea about half as long as the lemma 1. A. alba. 



Palea wanting 2. A. perennans. 



1. Agrostis - alba L. Sp. PI. 63. 1753. Redtop. 

 Perennial from creeping rootstocks ; culms erect ; blades flat, scabrous ; 



panicles open. 



Commonly cultivated in the United States as a meadow and pasture grass. 

 Introduced in Jamaica on Blue Mountain Peak. Originally described from 

 Europe, /y 



2. Agrostis perennans (Walt.) Tuckerm. Amer. Journ. Sci. 45: 44. 1843. 

 Cornucopiae perennans Walt. Fl. Carol. 74. 1788. 



Culms tufted, weak, ascending, the leaves mostly clustered toward the base, 

 the panicles loose and open, the spikelets borne at the ends of the branchlets. 



Open woods, northeastern United States to northern South America ; also in 

 the mountains of Santo Domingo (Constanza, Loma Rosilla). Originally de- 

 scribed from South Carolina. HoJL*^, J §^-c-rccx5vA , 



y 70. NOTHOLCUS Nash. 



Spikelets 2-flowered ; glumes equal, exceeding the florets ; lower floret perfect, 

 awnless, the upper staminate, bearing a hooklike dorsal awn. 



1. Notholcus lanatus (L.) Nash; Hitchc. in Jepson, Fl. Calif. 1: 126. 1912. 



Velvet gkass. 

 Holcus lanatus L. Sp. PL 1048. 1753. 



Perennial, 0.5 to 1 meter tall, grayish-velvety throughout, the pale, rather 

 densely flowered narrow panicle usually 8 to 10 cm. long. 



Introduced in America and occasionally cultivated as a meadow grass. Orig- 

 inally described from Europe. Collected in Jamaica (Hart 748), no locality 

 given. 



71. TRISETUM £ers. 



Spikelets with 2 or 3 perfect florets; glumes unequal; lemmas bidentate, 

 bearing a slender dorsal awn. 



1. Trisetum spicatum (L.) Richt. PL Eur. 1: 59. 1890. 

 Aira spicata L. Sp. PL 64. 1753. 

 Trisetum toluccense Kunth, Rev. Gram. 1: 101, 297. pi. 60. 1829. 



