CARDUACEAE. 373 



3. Wyethia scabra Hook. Dry plains from Wyo. to N. ]M. and Utah. — 

 Alt. about 5000 ft. — La Plata Valley; base of Carisa {Brandegec). 



50. HELIANTHUS L. Sun-flower. 



Annuals ; leaves broad, ovate or cordate or lanceolate ; disk purple. 

 Bracts ciliate, hispid, ovate or obovate, abruptly acuminate. 

 Lower leaves, at least, ovate or cordate, distinctly toothed. 



1. H. lenticularis. 

 Leaves lanceolate or narrowly deltoid, minutely toothed or entire. 



2. H. aridus. 

 Bracts not ciliate, canescent-strigose. lanceolate. 3. H. petiolaris. 



Perennials. 



Disk dark brown or purple. 



Leaves linear. 4. H. orgyalis. 



Leaves rhombic-ovate. 5. //. subrhomboideus. 



Disk yellow or light brownish. 

 Bracts broadly lanceolate, acute, appressed. 6. H. puinilus. 



Bracts narrowly lanceolate, acuminate, more or less spreading or squarrose. 

 Stem more or less scabrous or hispid ; the upper leaves subsessile. 



Leaves and stem very scabrous. 7. H. MaximUiani. 



Leaves scabrous above, hirsute beneath ; stem more or less hirsute. 



8. H. giganteus. 

 Stem, except the upper portion, glabrous and glaucous (rarely hirsute with 

 few hairs) : leaves mostly all petioled. 

 Leaves coarsely toothed ; bracts hirsute-ciliate. 9. H. grosseserratits. 

 Leaves distantly and minutely denticulate or subentire ; bracts not 

 ciliate or ciliate merely at the base. 10. H. fascicularis. 



1. Helianthus lenticularis Dougl. (H. annus A. Gray, in part; not L.) On 

 plains and in alluvial soil from N. D. and Ida. to Tex. and Ariz. — Alt. 4000- 

 7000 ft. — Caiion City; Valley Spur; Black Canon; Ft. Collins; valley of 

 Upper Arkansas River; Huerfano Valley, near Gardner; Boulder; Pennock's 

 mountain ranch. 



2. Helianthus aridus Rydb. In arid soil from ]\Iont. to Neb. and N. Mex. 

 — Alt. 4000-7000 ft. — ^lanitou. 



3. Helianthus petiolaris Xutt. On dry plains and in waste places from 

 Minn., Sask, Mont, and Ore. to Tex. and Calif. — Alt. 4000-10,000 ft. — Colo- 

 rado Springs ; Ft. Collins ; Boulder ; Eldora to Baltimore ; Wray. 



4. Helianthus orgyalis DC. On plains from Mo. and Colo, to Tex. — 

 Southeastern Colorado. 



5. Helianthus subrhomboideus Rydb. (H. rigidus A. Gray, in part) On 

 plains from Man., Sask. and Mont, to Colo, and Neb. — Alt. 4000-8000 ft. — 

 La Pagosa; mountains, Larimer Co.; near Pagosa Peak; Cheyenne INIoun- 

 tain; Bosworth's ranch, Stove Prairie: Boulder; canon west of Palmer Lake; 

 Horsetooth Mountain. 



6. Helianthus pumilus Nutt. On plains and mountains of Wyo. and Colo. 

 — Alt. 5000-7500 ft. — Idaho Springs; Caiion City; New Windsor; Golden; 

 Trail Glen; Horsetooth Gulch; Boulder; Harden's ranch; foot-hills, Dixon 

 Caiion; hill south of Horsetooth Mountain; Bosworth's ranch, Stove Prairie; 

 gulch west of Pennock's ; Spring Cafion. 



7. Helianthus Maximiliani Schrad. On prairies and in river valleys from 

 Man. and Wyo. to Tex.— Alt. 4000-7000 ft— Sterling, Logan Co.; Black 

 Caiion of the Gunnison. 



