AMARANTHACEAE. 121 



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. 



I. Acnida tamariscina (Nutt.) Wood. In alluvial soil from 111. to S. D., 

 La. and N. M. — Alt. up to 5000 ft. — Fort Collins. 



3. CLADOTRIX Nutt. 



I. Cladotrix lanuginosa Nutt. In dry soil from Kans. to Colo., Tex., Ariz, 

 and Mex.— Rocky Ford. 



I. FROELICHIA Moench. 



Stout, 6-12 dm. tall; crest of fruiting calyx continuous, dentate, i. 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. 

 I. PARONYCHIA Adans. Whitlow-worth. 



Flowers solitary ; leaves scarcely exceeding the bracts ; plants densely pulvinate. 

 Leaves elliptic, thick, not spinulose-tipped. i. P- pulvinata. 



Leaves linear, chartaceous, spinulose-tipped. 



Leaves arcuate, spreading; spinules of sepals over i mm. long. 



2. P. scssiliflora. 



