WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 211 
Sepals 5; plants tall, stout, erect; inflorescence mostly of 
dense terminal spikes. 
Sepals contracted near the base................2..-.200 3. A. pringlei. 
Sepals not contracted at the base. 
Stamens uniformly 3. 
Seed obovate......-2..-...00.. 00.2 c cece eee eee 4. A. ovovatus. 
Seed orbicular. 
Sepals obtuse, purplish, firm; spikes leafy, 
interrupted......................--. 5. A. wrightii. 
Sepals acute, whitish, scarious; : spikes naked, 
dense..........22-222 2.2 eee eee eee 6. A. powellii. 
Stamens 5, or rarely fewer. 
Plants densely viscid; bracts about 3 times as 
long as the sepals............... 200.0000 7. A. bracteosus. 
Plants not viscid; bracts twice as long as the 
sepals or shorter. 
Sepals obtuse; spikes stout, erect........... 8. A. retroflexus. 
Sepals acute; spikes slender, drooping. 
Inflorescence green..................-- 9. A. hybridus. 
Inflorescence red...............2------ 10. A. paniculatus. 
1. Amaranthus palmeri 8. Wats. Proc, Amer, Acad, 12: 274, 1877. 
Type Locauity: Larkins Station, San Diego County, California. 
Rance: Western Texas to the Pacific coast, southward into Mexico. 
New Mexico: Common from the Mogollon Mountains and Socorro to the White 
Mountains and Pecos Valley and southward across the State. Lower and Upper 
Sonoran zones. 
A tall, coarse native weed, usually 50 to 100 cm. high, occasionally reaching 250 
cm,, common in fields, on ditch banks, and along roadsides. The staminate plants are 
usually rather slender, and the terminal spike is frequently weak and drooping, 
sometimes considerably elongated. The pistillate plants are usually branched near 
the base and sometimes spread considerably, while the spikes are very dense and 
elongated, ultimately becoming very spiny from the fruiting bracts. 
In some localities the plant is considered valuable as stock feed and has been cut 
and cured for hay when at the right stage of growth. It is said to cause bloating in 
cattle when eaten in too great abundance while the plants are young and succulent. 
2. Amaranthus torreyi (A. Gray) Benth.; 8. Wats. Bot. Calif. 2: 42. 1880. 
Amblogyne torreyi A. Gray, Proc. Amer. Acad. 5: 167. 1861. 
TypE LocALity: Western Texas. 
RaNGE: Nebraska to Nevada, southward into New Mexico, western Texas, and 
Mexico. 
New Mexico: Arroyo Ranch (Griffiths 5702). Upper Sonoran Zone. 
The species is probably more or less common along the eastern tier of counties of 
the State, but we know of only the single collection cited above. 
3. Amaranthus pringlei S. Wats. Proc. Amer. Acad, 21: 476. 1886. 
Type Locauiry: On rocky hills near Chihuahua, Mexico. 
Rance: Western Texas to Nevada, southward into Mexico. 
New Mexico: Mangas Springs; Berendo Creek; Mineral Creek; Organ Mountains; 
Dog Spring. Upper Sonoran Zone. 
This is much rarer than the other species of the genus, occurring mostly in the foot- 
hills and lower mountains and not appearing as a weed. 
4. Amaranthus obovatus 8S. Wats. Proc. Amer. Acad. 12: 275. 1877. 
TypE LocALity: Copper Mines, New Mexico. Type collected by Wright (no. 1748, 
in part). 
