356 CARDUACEAE. 



32. Aster corymbiformis Rydb. In meadows in Colo. — Alt. 5000-8000 ft. — 

 Parlin, Gunnison Co.; Ft. Collins; Westclifife ; Denver. 



33. Aster longulus Sheldon. In wet meadows from Minn, and Alb. to Neb. 

 and Colo. — Twin Lakes ; Westcliffe. 



34. Aster lonchophyllus Greene. In the mountains of Colo. — Alt. 8000- 

 10,000 ft. — Crested Butte ; Gore Pass. 



35. Aster Fremontii A. Gray. In valleys from Mont, to Colo. — Alt. 9000- 

 12,000 ft. — Cameron Pass; Breckenridge; Michigan; Trappers' Lake; fronton 

 Park, nine miles south of Ouray; Sherwood's; Laramie River; Robinson; 

 Twin Lakes ; Marshall Pass ; Ruxton Park ; Lake City. 



36. Aster armeriaefolius Greene. In the mountains of Wyo. and Colo. — 

 Alt. 8000-10,000 ft. — Doyles ; Marshall Pass ; Laramie River, Larimer Co. ; 

 Grizzly Creek ; Bosworth's ranch, Stove Prairie. 



37. Aster Tweedyi Rydb. In valleys of Wyo. and Colo. — Alt. about 5000 

 ft. — Near Laramie River, Larimer Co. 



38. Aster adscendens Lindl. In valleys from Ass. to Colo, and Nev. — Alt. 

 8000-10,000 ft. — Near Empire; mountains between Sunshine and Ward; Ft. 

 Collins; Grizzly Creek. 



39. Aster Nuttallii T. & G. (A. orthophyllus Greene) In the mountains 

 from Wyo. to Colo, and Calif. — Alt. 5000-8000 ft. — Gunnison ; Ft. Collins ; 

 Cerro Summit; Montrose. 



40. Aster fulcratus Greene. In valleys of Colo. — Alt. about 9000 ft. — Near 

 Pagosa Peak. 



41. Aster Eatonii (A. Gray) Howell. {A. foliaceus Eatonii A. Gray; 

 Brachyactis hybrida Greene) In the mountains from Mont, and B. C. to 

 Colo, and Calif. — Alt. about 5000-8000 ft. — Poudre River; Gunnison; Upper 

 Arkansas ; Cheyenne Canon. 



42. Aster frondeus (A. Gray) Greene. (A. foliaceus frondeus A. Gray; 

 Aster glastifolius Greene) Iri the mountains from Ida. and B. C. to Colo, 

 and Nev.^Alt. 8000-10,000 ft. — Empire; near Laramie River, Larimer Co.; 

 Ruxton Dell ; near Pagosa Peak ; Mt. Harvard. 



43. Aster Canbyi Vasey. In the mountains of Colo. — Alt. 8000-11,000 ft. — 

 Crested Butte ; McCoy ; near Grand Lake ; Mt. Harvard ; mountains between 

 Laramie River and North Park ; Gypsum ; Berthoud Pass ; canon west of 

 Palmer Lake. 



44. Aster Burkei (A. Gray) Howell. {A. foliaceus Burkei A. Gray) In 

 the mountains from Wyo. and Wash, to Colo, and Ariz. — Robinson ; Steam- 

 boat Springs; Hotchkiss. 



45. Aster apricus (A. Gray) Rydb. {A. foliaceus apricus A. Gray) On 

 alpine peaks from Mont, and B. C. to Colo, and Ore. — Alt. 8000-12,000 ft. — 

 Gray's Peak; Twin Lakes; Westclifife; Boreas; Buffalo Pass; Empire; Bert- 

 houd Pass; Grizzly Creek. 



29. MACHAERANTHERA Nees. 



Leaves twice pinnatifid ; root annual ; achenes terete. i. M. tanacetifolia. 



Leaves spinulose-toothed ; plant perennial or biennal ; achenes compressed. 



Bracts linear-subulate ; green tips of most of them longer than the straw- 

 colored lower portion, squarrose-reflexed. 

 Stem and inflorescence distinctly viscid. 



