WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 111 
Inflorescence a compound umbel with unequal rays. 
Glumes as broad as long, 2 mm. long or less, mu- 
cronulate, usually green...............-- 4. C. rusbyt. 
Glumes twice as long as broad, 3 mm. long, 
acuminate into a spreading awn, yellowish 
Spikelets linear; scales of the flowers overlapping from 
one-half to two-thirds their length. 
Spikelets deciduous as a whole when mature. 
Spikelets with few, usually 2 or 3, flowers...... 6. C. uniflorus. 
Spikelets with 6 to 9 flowers........-...--...+-- 7. C. speciosus. 
Scales of the spikelets falling from the rachilla. 
Rachilla narrowly winged, the wings adnate; 
plants stout, stoloniferous; spikelets loose- 
ly clustered.....-....2.2....222222-2--2-- 8. C. esculentus. 
Wings of the rachilla not adnate, forming scales 
anterior to the flower; plants and spikelets 
various. 
Spikelets densely crowded; flowers numerous, 
about 20 to the spikelet; scales of the 
flower not bordered with red; plants 
1 0) 0 9. C. erythrorhizos. 
Spikelets fewer, loosely clustered; flowers 12 
to the spikelet or less; scales red- 
margined; plants slender.........-..--10. C. sphacelatus. 
1. Cyperus inflexus Muhl. Descr. Gram. 16. 1817. 
Type LocaALity: Pennsylvania. 
RanGE: British America south to Mexico. 
New Mexico: Cedar Hill; Shiprock; West Fork of the Gila; Santa Rita; San Luis 
Mountains; Organ Mountains. Moist ground, in the Upper Sonoran Zone. 
2. Cyperus cyrtolepis Torr. & Hook. Ann. Lyc. N. Y. 3: 436. 1836. 
Type LocaLity: ‘‘Texas.”’ 
Rance: Oklahoma to Texas and Arizona. 
New Mexico: A single specimen, without locality, seen. 
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3. Cyperus fendlerianus Boeckel. Linnaea 35: 520. 1868. 
Type Locatity: Near Santa Fe, New Mexico. Type collected by Fendler (no. 865). 
RanGE: Arizona and western Texas to Mexico. 
New Mexico: Tunitcha Mountains; Santa Fe and Las Vegas mountains; Wagon 
Mound; Magdalena; Mangas Springs; Black Range; San Luis Mountains; Organ 
Mountains; White and Sacramento mountains. Open slopes, in the Upper Sonoran 
and Transition zones. 
4. Cyperus rusbyi Britton, Bull. Torrey Club 11: 29. 1884. 
Tyre Locauity: Near Silver City, New Mexico. Type collected by Rusby in 1880. 
Rane@eE: Mountains of New Mexico and western Texas. 
New Mexico: West Fork of the Gila; Silver City; Animas Valley; San Luis Moun- 
tains; Organ Mountains; Arroyo Ranch; Gray; Elida; Queen. Upper Sonoran and 
Transition zones. 
5. Cyperus schweinitzii Torr. Ann. Lyc. N. Y. 3: 276. 1836. 
Tyre LocaLity: Dry sand on the shore of Lake Ontario, near Greece, Monroe 
County, New York. 
