AMARANTHACEAE. 
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1. Amaranthus Torreyi (A. Gray) Benth. ( Amblogyne Torreyi A. Gray.) 
In sandy soil from Iowa and Wyo. to Mex. and L. Cal.—Alt. 4000-5000 ft.— 
Fort Collins; north fork of Gunnison, Delta Co. 
2. Amaranthus Palmeri S. Wats. In sandy soil from Kans. and Colo, to 
Tex. and Ariz.; also in Mex.—Alt. about 6000 ft.—Clear Creek Canon, above 
Golden. 
3. Amaranthus Powellii S. Wats. In sandy valleys from Colo, to Texas 
and Calif.—Alt. up to 9000 ft.—Southeast of Ouray; Boulder; Alamosa. 
4. Amaranthus retroflexus L. In waste places from Vt. to Ida., Fla. and 
Mex.; naturalized from Europe.—Alt. up to 6000 ft.—Denver; Cheyenne 
Mountain; Fort Collins; Durango. 
5. Amaranthus hybridus L. In waste places from R. I. to Colo., Fla. and 
Calif.; also in Mex.; naturalized from Europe.—Upper Rio Grande; exact 
locality not given. 
6. Amaranthus blitoides S. Wats. In dry grounds, roadsides and waste 
places from N. Y. to Mont., La. and Calif.—Alt. 4000-10,000 ft.—Pike’s Peak 
trail; Manitou; Colorado Springs; Ouray; Buena Vista; Durango; vicinity 
of Fort Collins. 
7. Amaranthus graecizens L. (A. albus L.) In cultivated grounds and 
waste places from R. I. to Wash., Fla. and Ariz.; introduced from tropical 
America.—Alt. 4000-6000 ft.—Colorado Springs; Fort Collins. 
2. ACNIDA L. Water Hemp. 
1. Acnida tamariscina (Nutt.) Wood. In alluvial soil from Ill. to S. D., 
La. and N. M.—Alt. up to 5000 ft.—Fort Collins. 
3. CLADOTRIX Nutt. 
1. Cladotrix lanuginosa Nutt. In dry soil from Kans. to Colo., Tex., Ariz. 
and Mex.—Rocky Ford. 
1. FROELICHIA Moench. 
Stout, 6-12 dm. tall; crest of fruiting calyx continuous, dentate. 1. F. campestris. 
Slender, 2-5 dm. high; crest of fruiting calyx interrupted. 2. F. gracilis. 
1. Froelichia campestris Small. (F. Floridana Coult.; in part.) In sandy 
soil from Mo. to Colo, and Tex.—Alt. about 5000 ft.—New Windsor, Weld 
Co. 
2. Froelichia gracilis Moq. In sandy valleys from Neb. to Colo., Ark. and 
Texas.—Alt. 4000-6000 ft.—Boulder; Colorado Springs; Denver; along Pou- 
dre; Fort Collins; Manitou; Ute Pass. 
Family 47. CORRIGIOLACEAE Reichenb. Whitlow-wort Family. 
1. PARONYCHIA Adans. Whitlow-worth. 
Flowers solitary ; leaves scarcely exceeding the bracts; plants densely pulvinate. 
Leaves elliptic, thick, not spinulose-tipped. 1. P. pulvinata. 
Leaves linear, chartaceous, spinulose-tipped. 
Leaves arcuate, spreading; spinules of sepals over 1 mm. long. 
2. P. sessilfflora. 
