362 CARDUACEAE. 



XIII. BELLIDTASTRA. 



One species. 44. E. Bellidiastrum. 



XIV. DlVERGENTES. 



Stem simple below. 45. E. Wootonii. 



Stem branched at the base. 46. E. divergens. 



XV. FLAGELLARES. 



Leaves and stem appressed-hairy. 47. E. ftagellaris. 



Leaves and stem densely short-pubescent with spreading hairs. 



Basal leaves oblanceolate, entire, or 3-lobed at the apex ; leaves of the stolons 



linear; plant gray. 48. E. cinereus. 



Basal leaves obovate-spatulate, entire, or with several lateral lobes or teeth ; 

 leaves of the stolons oblanceolate; plant greener. 49. E. nudiflorus. 



XVI. CAN i. 



Disk of the heads fully i cm. high and about 1.5 cm. wide; basal leaves spatulate, 

 obtuse. 50. E. argentatus. 



Disk of the heads 7-8 mm. high and about i cm. wide ; basal leaves oblanceolate, 

 mostly acutish. 51. E. canus. 



XVII. CAESPITOSI. 



Stem erect, about 3 dm. high, usually with several heads ; stem-leaves linear. 



52. E. subcanescens. 



Stem decumbent at the base, 1-2 dm. high, with 1-3 (seldom more) heads ; 

 stem-leaves oblong. 53. E. caespitosus. 



1. Erigeron minor (Hook.) Rydb. (E. armeriaefolius A. Gray, in part; 

 not Turcz.) In damp places in the mountains from Sask. and B. C. to Colo, 

 and Utah. Alt. 7000-10,000 ft. Lake City; Democrat Mountain; George- 

 town; South Park; Twin Lakes; Westcliffe; Red Mountain road, south of 

 Ouray; Gunnison; Palsgrove Canon; Clear Lake; Grand River, above Kremm- 

 ling; Grizzly Creek; Pagosa Springs; Buena Vista; Buffalo Pass; near 

 Como; Trappers' Lake. 



2. Erigeron lonchophyllus Hook. (E. armeriaefolius A. Gray, in part) In 

 wet places in the mountains from Sask. and Mont, to Colo, and Nev. Alt. 

 8000-9000 ft Parlin; Ruxton Park, Pike's Peak; Higho; Table Rock; 

 Gypsum Creek; Buena Vista; Grizzly Creek; Twin Lakes. 



3. Erigeron droebachiensis Muell. (E. acris Droebachiensis Blytt) In 

 dry woods from N. B. and Alaska to Colo. Breckenridge ; Mt. Harvard; 

 Anita Peak. 



4. Erigeron yellowstonensis A. Nels. (E. acris A. Gray, in part; not L.) 

 In the mountains from Mont, to Colo. Alt. 9000-10,000 ft. Breckenridge; 

 Chambers' Lake; Beaver Creek. 



5. Erigeron jucundus Greene. (E. acris debilis A. Gray; . debilis Rydb.) 

 In wet places, especially in the mountains, from Hudson Bay and B. C. to 

 Colo, and Utah. Alt. 8000-11,000 ft. Massif de 1'Arapahoe; Mt. Baldy; 

 headwaters of Clear Creek; Georgetown; Eldora to Baltimore. 



6. Erigeron pinnatisectus (A. Gray) A. Nels. (E. compositus pinnatisectus 

 A. Gray) On the higher peaks of Wyo. and Colo. Alt. 10,000-13,500 ft. 

 Hahn's Peak; Cameron Pass; Pike's Peak; near Ironton, San Juan Co.; 

 Gray's Peak; Mt. Garfield; Mt. Harvard; south of Ward, Boulder Co.; above 

 Boreas; Bottomless Pit; Bald Mountain; Little Kate Mine, La Plata Moun- 

 tains; near Pagosa Peak; Westcliffe; Devil's Causeway; Beaver Creek. 



