WOOTON AND STANDLEY FLORA OF NEW MEXICO. 89 



broad at the base, subcoriaceous, obscurely many-nerved, unequally divided into 9 

 to 23 awnlike lobes; palea rather broad, 2-keeled near the margins. 



1. Pappophorum. wiightii S. Wats. Proc. Amer. Acad. 18: 178. 1883. 



Type locality: Western Texas or southern New Mexico. 



Range: Western Texas and southern Arizona and southward. 



New Mexico: Bear Moimtain; Kingston; Cerrillos; Socorro; Dog Spring; Las 



Cruces; Organ Mountains; Carrizozo. Dry hills, in the Lower and Upper Sonoran 



zones. 



52. SCLEROPOGON Phil. False needle grass. 



Perennial, cespit)se, often stoloniferous grasses with nearly simple panicles; spike- 

 lets unisexual, the two kinds unlike, 2 to many-flowered; staminate spikelets many- 

 flowered, the glumes narrow, acute, 3-nerved, awnless, unequal, the lemmas some- 

 times minutely 3-toothpd at the apex, the palea narrow and rigid; stamens 3; pistillate 

 spikelets 1 to many-flowered, the glumes persistent, very unequal, the lemmas rigid, 

 narrow, the 3 nerves produced into very long slender divergent twisted awns; styles 

 distinct, elongated; grain free, naiTow, elongated. 



1. Scleropogon brevifolius Phil. Anal. Univ. Chile 34: 205. 1870. 



Type locality: Chile. 



Range: Arizona and western Texas to Mexico and South America. 



New Mexico: Camzo Mountains; Hillsboro; Albuquerque; Socorro; Tucumcari; 

 Dona Ana Mountains; Organ Mountains; Deming; Candzozo; WTiite Mountains; Pecos 

 Valley. T)ry hills and plains, in the Lower and Upper Sonoran zones. 



Very common on the mesas of southern New Mexico and of considerable importance 



as a range grass. 



53. PHRAGMITES Trin. Carrizo. 



Tall reedlike perennial with stout leafy culms and large terminal panicles; spike- 

 lets loosely 3 to 7-flowered; rachilla jointed above the glumes and between the florets, 

 clothed with long silky hairs; lowest floret staminate or neutral, the others fertile; 

 glumes unequal, lanceolate, acute, shorter than the florets; lemmas glabrous, very 

 nan'ow, acuminate; grain free. 



1. Phragniites phragmites (L.) Karst. Deutsch. Fl. 379. 1880-3. 



Arundo phragmites L. Sp. PI. 81. 1753. 



Phragmites comnnunis Trin. Fund. Agrost. 134. 1820. 



Type locality: "Habitat in Europae lacubus flu\dis." 



Range: Nearly throughout the United States and in Mexico; also in Europe and 

 Asia. 



New Mexico: Farmington; Cimarron; Canada Alamosa; Copper Mines; Mimbres 

 River; Mesilla Valley; Round Mountain; Roswell. In wet ground, especially in 

 river valleys, in the Lower and Upper Sonoran zones. 



54. ARUNDO L. 



Tall (2 to 3 meters or more) perennial with flat leaves and ample terminal panicles; 

 spikelets 2 to many-flowered; rachilla jointed above the glumes and between the 

 florets, smooth; florets crowded, fertile, or the upper or lower staminate; glumes 2, 

 naiTow, subequal, 3-nerved, smooth, acute or acuminate, about the length of the spike- 

 let; lemmas membranaceous, 3-nerv^ed, 2-toothed at the apex, mucronate between 

 the teeth, long-pilose on the back; palea hyaline, 2-keeled; grain smooth, free. 



1. Arundo donax L. Sp. PI. 81. 1753. Giant reed. 



Type locality: "Habitat in Hispania, Gallopro\-incia." 



Range: Western Texas and southern New Mexico to Mexico, probably naturalized; 

 also in the Old Worid. 



