WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 51 
New Mexico: Mesilla Valley; Belen; Eagle Creek; Guadalupe Mountains; Lake- 
wood; Carlsbad. Mesas and valleys, in the Lower Sonoran Zone. 
vw 38. Amphilophis barbinodis (Lag.) Nash in Small, Fl. Southeast. U. S. 65. 1903. 
Andropogon barbinodis Lag. Gen. & Sp. Nov. 3. 1816. 
Type Locauity: ‘‘H [abitat] in N [ova] H [ispania].’’ 
Ranae: Southern New Mexico and Arizona and northern Mexico. 
New Mexico: Las Vegas Canyon; Black Range; Silver City; Burro Mountains; 
Mesilla Valley; Organ Mountains; Nara Visa; Buchanan; Knowles; Carlsbad. Dry 
hills and mesas, in the Lower and Upper Sonoran zones. 
6. ANDROPOGON L. Tati saGceE Grass. 
Tall perennials, tufted or from elongated rootstocks, with flat or involute leaves and 
with spikelike racemes disposed in pairs or sometimes in 3’s or more, terminating the 
stem or its branches; spikelets sometimes with a ring of short hairs at the base, in 
pairs at each node of the jointed and often hairy rachis, one sessile and fertile, the 
other pedicellate and sterile; glumes indurated, often pubescent; lemma entire or 
2-toothed at the apex, awned or sometimes awnless; palea small, hyaline; stamens 1 
to 3; styles distinct. 
KEY TO THE SPECIES. 
Second lemma of the sessile spikelet awnless, or with a short 
straight aWN.... 2.22... eee eee eee eee eee 1. A, hallit. 
Second lemma of the sessile spikelet with a long geniculate awn, 
more or less twisted at the base. 
Glumes of the sessile spikelet hispidulous all over; hairs of 
the rachis internodes 2 mm. long or less.............-. 2. A. furcatus. 
Glumes of the sessile spikelet glabrous or nearly so except on 
the nerves; hairs of the rachis internodes 3 to 4 mm. 
; 0) 61 3. A. chrysocomus. 
a 1. Andropogon hallii Hack. Sitzungsb. Akad. Wiss. Math. Naturw. (Wien) 89: 
127. 1884. 
Type Loca.tity: Colorado. 
RanGe: Montana and Nebraska to Kansas and Mexico. 
New Mexico: Near Portales; Buchanan; northeast of Clayton; mountains west of 
Las Vegas; Nara Visa; Arroyo Ranch. Plains, in the Upper Sonoran Zone. 
2. Andropogon furcatus Muhl.; Willd. Sp. Pl. 4: 919. 1806. 
Andropogon provincialis furcatus Hack. in DC. Monogr. Phan, 5: 442. 1889. 
Type Locauity: ‘Habitat in America boreali.”’ 
Rance: British America to Florida and New Mexico. 
New Mexico: Tunitcha Mountains; Dulce. Dry hills and plains, in the Upper 
Sonoran Zone. 
Yv 3. Andropogon chrysocomus Nash in Britton, Man. 70. 1901. 
TYPE LOCALITY: Stevens County, Kansas.? 
RanGE: Kansas and Texas to New Mexico. 
New Mexico: Carrizo Mountains; White and Sacramento mountains. Plains and 
dry hills, in the Upper Sonoran and Transition zones. 
7. HOLCUS L. 
Tall perennial with numerous long rootstocks, broad flat leaves, and large terminal 
panicles; spikelets in pairs or 3’s at the ends of the branches, one sessile and perfect, 
the others pedicellate and staminate, dorsally compressed, pubescent or glabrous; 
glumes indurated; lemma hyaline, awned or awnless; stamens 3; styles distinct. 
1N. Amer. FI. 17: 120. 1912. 
