350 CARDUACEAE. 



Plant acaulescent ; heads sessile among the rosulate leaves. 



Plant glabrate, cinereous only when young; leaves oblanceolate or spatulate. 

 Bracts broadly lanceolate, tinged with red. 



Bracts obtuse ; ray-flowers with a very short pappus. 



8. 7". Rothrockii. 

 Bracts acute : pappus of disk-and ray-flowers alike. 9. 7". Wilcoxiaua. 

 Bracts narrowly lanceolate, mostly green. 10. T. intermedia. 



Plant permanently cinerous ; leaves linear or linear-oblanceolate. 



1 1 . 7". exscapa. 



1. Townsendia grandiflora Nutt. On plains and hills from S. D. and Wyo. 

 to Ind. Terr, and Colo. — Alt. 4000-11,000 ft. — Morrison; Manitou ; South Table 

 Mountain ; Ft. Collins ; Larimer Co. ; Red Rock Canon ; Garden of the 

 Gods ; Spring Cation ; Boulder ; Horsetooth Gulch ; Pennock's mountain ranch ; 

 Soldier Canon. 



2. Townsendia eximia A. Gray. On mountain sides from Colo, to Tex. and 

 Ariz. — " Colorado." 



3. Townsendia Vreelandii Rydb. In mountain sides and in valleys of 

 southern Colo. — Alt. 8000-10,000 ft. — Veta Pass ; Veta Mountain ; West Span- 

 ish Peak. 



4. Townsendia Fendleri A. Gray. Gravelly hills in N. M. and Colo. — 

 Roubadeaux Pass ; Salida ; Arkansas River, near Poncha Pass. 



5. Townsendia strigosa Nutt. On gravelly hills from Wyo. to N. M. and 

 Ariz. — Alt. 7000-10,000 ft. — Silver Plume ; Mancos ; Hotchkiss. 



6. Townsendia incana Nutt. Mountains and hills from Wyo. and Utah to 

 N. M. and Ariz. — Alt. 4000-5000 ft. — Grand Junction ; Rifle ; Palisades. 



7. Townsendia glabella A. Gray. (T. Bakeri Greene) On dry hillsides 

 of Colo. — Alt. about 8500 ft. — La Pagosa; Dix; Los Pinos (Bayfield). 



8. Townsendia Rothrockii A. Gray. On mountains of southern Colo. — 

 Alt. up to 13,000 ft. — South Park. 



9. Townsendia Wilcoxiana Wood. On dry plains and hills from Ind. Terr, 

 to Colo. — San Louis Range. 



10. Townsendia intermedia Rydb. On dry plains and hills from Neb. and 

 Wyo. to Kans. and Ariz. — Alt. about 5000 ft. — Lake City ; Ft. Collins ; 

 South Park; Colorado City. 



11. Townsendia exscapa (Richardson) Porter. (T. sericea Hook.) On 

 dry plains from Sask. and Mont, to Tex. and N. M.— Alt. 4000-8000 ft.— 

 Uncompahgre Mountains, near Los Pinos ; Denver ; New Windsor ; Central 

 City ; butte five miles southwest of La Veta ; mesas near Colorado Springs ; 

 La Veta; Ft. Collins; Los Pinos (Bayfield); plains near Denver; Dixon 

 Cation ; hills near Arthur's Rock ; Horsetooth Gulch. ' 



24. BRACHYACTIS Ledeb. 



Bracts oblong or oblong-linear, obtuse. i. B. frondosa. 



Bracts narrowly linear, acute. 2. B. angusta. 



1. Brachyactis frondosa (Nutt.) A. Gray. (Aster frondosus T. & G.) 

 Along streams and pools from Wyo. and Ida. to Colo, and Calif. — Hotchkiss, 

 Delta Co. 



2. Brachyactis angusta (T. & G.) Britton. {Aster angustus T. & G.) In 

 wet saline soil from Ills., Sask. and Alb. to Mo., Colo, and Utah. — Blue River, 

 above Kremmling; New Windsor; Hotchkiss. 



