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. sessiliflora. 



