1894.] North American Species of Amaranthus. 315, 
17: 4c, SPINGSUS’ L...-So. Flvoot, 4 3ee 
Known as the only thorny amaranth. A slovenly weed, spreading 
from South America northward through Mexico and the West Indies, 
throughout southern and southeastern United States north to Kansas 
and New England. 
$4. Sepals various: flowers in very small axillary spikes 
or clusters: stem low or prostrate with smaller leaves than 
in the preceding sections: stamens 3. 
* Sepals of both kinds of flowers 4 or 5: 
plant prostrate: utricle circumscissile: seeds large (1.3""). 
18. A. BLITOIDES Wats. Proc. Amer. Acad. 12: 273. 
1877. 
three sepals to it, though it is difficult to see how he could have com- 
mitted the error, for the very types upon which he founded the spe- 
~<a clearly contain four or five sepals in addition to the subtending 
ract. 
Var. densifolius, n. var. 
Leaves exceedingly crowded, small, oblanceolate (1 to 2™ 
oe Hackberry (Rusby 804); Colorado (Greene 
14). 
Var. Reverchoni, n. var. 
Stem and branches very slender: leaves narrow, reduced, 
not crowded: calyptra of utricle brownish red.—Collected 
near Dallas, Tex., in 1881 (Reverchon, 824). 
The character of red coloration in the utricles is not exclusive, ier 
24s also seen in specimens of A. d/itoides from Providence, R. L., an 
Scott’s Bluff co., Neb. 
* * Sepals four or five, spatulate, united at base; peduncles _ 
and pedicels (apparently abnormally) thickened (SCLEROPUS. } 
* Utricle indehiscent, thick, coriaceous: style branches 2, 
lyrate in fruit. 
19. A. CRASSIPES Schlecht. Linnza, 6: 757. 1831. 
SP ographical range the same as A. polygonoides with which it has 
included (Hemsley Biol. Cent. Fite 3:14) on the rod gag 
that the incrassate character of the peduncles is pathologica 
