SOME ERIGBRON SEGREGATES. 209 



Known to me only as collected in the extreme southwestern 

 Colorado, near Silverton, July, 1889, by Alice Eastwood. 



Erigeron iodanthus. Mode of growth quite that of E. 

 Smithii but rather small, the stems less than a foot high, tufted 

 and at base decumbent, stoutish, loosely hirsutulous to 

 above the middle, above that and to the peduncles more 

 densely so, but the hairs finer and shorter, accompanied by a 

 trace of sessile glands very minute : basal leaves long-petioled, 

 the blades broadly oblanceolate, obtuse, the whole 2 or 3 

 inches long and with sparse hairiness as to both faces, the 

 cauline oblong to lanceolate, sessile, acute, rather strongly 

 ciliate, but superficially glabrous or nearly so : heads large, 2 

 or 3, the terminal one not surpassed or even equalled by the 

 laterals ; bracts of involucre linear, acuminate, equal, glandu- 

 lar-puberulent : rays many, not extremely narrow, in color of 

 an intense blue-violet. 



Collected at 10,500 feet on some mountain in southern 

 Colorado, 9 Sept., 1903, by P. H. Knowlton. 



Erigeron hirtuosus. Habit of E. Smithii, but only 5 or 

 6 inches high, the stem strongly hirsutulous from base to sum- 

 mit, all except the very earliest leaves hardly less so ; lowest 

 basal leaves spatulate-obovate, obtuse or even retuse, glabrous 

 except marginally, and there showing only scattered short 

 straight spreading hairs ; stem leaves few, large for the plant, 

 spatulate to oblong, acutish, broad at base and sessile : heads 

 2 or 3, large, their short peduncles very hirsute, the involucres 

 glabrous except for a few hairs at the base, above it green and 

 naked, though with the mere suggestion of a glandular coat- 

 ing : rays long and very narrow, deep-purple. 



Collected in southern Wyoming, at 10,000 to 11,000 feet on 

 the Continental Divide, 15 July, 1901, by Frank Tweedy. 



Erigeron Mogollonicus. Stoutish and rigid, the several 

 stems 12 to 16 inches high, erect above an ascending basal part. 



