84 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Type locality: "Crescit in apricis subhumidis prope rupem porphyreticam el 

 Penon, in convalle Mexicana, alt. 1168 hexap." 



Kange: Arizona and western Texas to Florida and Mexico. 



New Mexico: Mangas Springs; near White Water; Dog Spring; near Silver City; 

 Organ Mountains; Tortugas Mountain; Carlsbad. Dry hills, in the Lower and Upper 

 Sonoran zones. 



44. ACAMPTOCLADOS Nash. 



Tufted perennial with stiff stems, involute leaves, and a panicle of scattered, dis- 

 tant, widely spreading, rigid branches; spikelets scattered, singly disposed in 2 rows, 

 sessile, 4 to 6-flowered; glumes subequal, acuminate, the first 1-nerved, the second 

 usually 3-nerved; lemmas 3-nerved, acute, indurated in fruit; palea compressed, the 

 2 nerves ciliolate, gibbous at the base; stamens 3; styles distinct. 



1. Acamptoclados sessilispicus (Buckl.) Nash in Small, Fl. Southeast. U. S. 140. 

 1903. 

 Erayroslis sessilispica Buckl. Proc. Acad. Phila. 1862: 97. 1863. 

 Diplachne rigida Vasey, U. S. Dept. Agr. Div. Bot. Bull. 12: pi. 41. 1891. 

 Type locality: Near Austin, Texas. 

 Range: Kansas and Texas to eastern New Mexico. 



New Mexico: Sands south of Melrose; Nara Visa. Plains, in the Upper Sonoran 

 Zone. 



45. BECKMANNIA Host. Slough grass. 



Tall erect plant with flat leaves and terminal elongated inflorescence; spikelets 1 

 or 2-flowered, compressed, imbricated in 2 rows along one side of the rachis of the 

 short spikes; glumes narrow, boat-shaped, obtuse or abruptly pointed, nearly equal; 

 lemmas narrow, acute or mucronate; palea hyaline, 2-keeled; stamens 3; styles short, 

 distinct; grain oblong, inclosed within the rigid fruiting lemma and palea, free. 



1. Beckmanrda erucaeformis (L.) Host, Icon. Gram. Austr. 3: 5. 1805. 



Phalaris erucaeformis L. Sp. PI. 55. 1753. 



Type locality: "Habitat in Siberia, Russia, Europa austral i." 



Range: British America to California, New Mexico, and Iowa; also in Europe and 

 Asia. 



New Mexico: Farmington; Chama; Grants Station; Zuni. In marshes and along 

 streams, in the Transition Zone. 



46. CAPRIOLA Adans. 



Low creeping perennial with short flat leaves and slender spikes digitate at the 

 apex of the erect branches; spikelets 1-flowered, awnless, sessile in 2 rows along one 

 side of a slender continuous axis, forming unilateral spikes; glumes narrow, keeled, 

 usually acute; lemma broader, usually slight!)' longer than the glumes, obtuse, pilose 

 on the keel and margins; palea about the length of the lemma, 2-keeled; stamens 3; 

 styles distinct; grain free. 



1. Capriola dactylon (L.) Kuntze, Rev. Gen. PI. 2: 764. 1891. Bermuda grass. 



Panicum dactylon L. Sp. PI. 58. 1753. 



Cynodon daclylon Pers. Syn. PI. 1: 85. 1805. 



Type locality: "Habitat in Europa australi." 



Range: Native of the Old World, widely introduced in southern North America, 

 often cultivated as a lawn grass. 



New Mexico: Mesilla Valley. 



Bermuda grass is often employed in New Mexico for lawns. It is especially valu- 

 able for this purpose in the southern part of the State, since it is resistant to heat and 

 drought. Sometimes it becomes a troublesome weed in cultivated fields. 



