374 CARDUACEAE. 



8. Helianthus giganteus L. In moist ground from Mc. and Sask. to Fla., 

 La. and Colo. — Mt. Harvard. 



g. Helianthus grosseserratus Martins. On plains and prairies from N. Y. 

 and W yo. to Pa., Tex. and Colo. — Ft. Collins. 



lo. Helianthus fascicularis Greene. (//. giganteus utahcnsis D. C. Eaton; 

 H. utahcnsis A. Nelson) In mountain valleys from Ass. and Alb. to Colo, 

 and Ariz. — Alt. 5000-8000 ft. — Gunnison ; Parlin, Gunnison Co. ; McCoy ; 

 Caiion City; Ft. Collins; mountains, Larimer Co.; Cache la Poudre; Boulder. 



51. HELIANTHELLA T. & G. 



Chaffs of the receptacle soft and scarious. 

 Rays conspicuous ; disk-flowers yellowish. 



Disk 2-3 cm. in diameter ; leaves ovate to lanceolate, thin, not strongly 



reticulate. i. H. quinqiicnervis. 



Disk less than 2 dm. wide ; leaves oblanceolate to linear, strongly reticulate. 



2. H. Parryi. 

 Rays few and scarcely surpassing the dark-purple disk-flowers. 



4. H . microcephala. 

 Chaffs of the receptacle firm-chartaceous. 3. H. uniHora. 



1. Helianthella quinquenervis A. Gray. Along mountain streams from S. D. 

 and Ida. to Colo. — Alt. 7000-10,000 ft. — Robinson; Cerro Summit; Mt. Har- 

 vard; Moon's ranch; mountains, Larimer Co.; North Park, near Teller; 

 Steamboat Springs; Leroux Park; Buffalo Pass; Four-mile Hill; foot of 

 Michigan Hill ; east slope of Rabbit-Ear Range ; Bosworth's ranch ; Mt. 

 Abram, Ouray ; Villa Grove ; South Park ; near Ironton, San Juan Co. ; 

 West Spanish Peak; Marshall Pass; Eldora to Baltimore; Berthoud Pass; 

 Spicer. 



2. Helianthella Parryi A. Gray. In the mountains of Colo., N. M. and 

 Ariz. — Alt. 8000-10,000 ft. — Lat. 39°-4i°; Veta Pass; Ruxton Dell; Artists' 

 Glen ; Green Mountain Falls ; Marshall Pass. 



3. Helianthella microcephala A. Gray. Dry plains of Southern Colo., N. M. 

 and Utah. — Alt. 4500 ft. — San Juan Valley. 



4. Helianthella uniflora (Nutt.) T. & G. On hills and mountains from 

 Mont, and Ida. to N. M. and Utah.— Table Rock. 



52. XIMENESIA Cav. 



I. Ximenesia exauriculata (Rob. & Greenm.) Rydb. (Verbesina encelioides 

 cxauriculata Rob. & Greenm.) In mountain valleys from Mont, to Tex. 

 and Ariz. — Alt. 5000-9000 ft. — Pass Creek ; Caiion City ; Colorado Springs ; 

 Rocky Ford; Ft. Collins; Pueblo; Mancos ; Hotchkiss, Delta Co.; Huerfano 

 Valley, near Gardner; Salida; Gunnison; Manitou; Boulder; Lafayette; 

 Montrose; Palmer Lake; Buena Vista; Timnath. 



53. COREOPSIS L. Tick-seed. 



Leaves once or twice pinnately divided. i. C. tinctoria. 



Leaves simple. 2. C. lanceolaia. 



1. Coreopsis tinctoria Nutt. Low ground from Man. to Va., Tex., Ariz, 

 and Alb. — Along Platte River, near Denver. 



2. Coreopsis lanceolata L. In rich soil from Ont. and Colo, to Fla. and 

 La. — Ft. Collins. 



