208 LEAFI.ETS. 



have taken up my Colorado and Wyoming materials, and 

 might easily have made the segregations — some of them at 

 least — which this personal rediscovery of Nuttall's plants con- 

 vinced me were called for. 



Two years later than the date of my collecting these things 

 in the southern part of Manitoba Mr. Rydberg, then unac- 

 quainted with the farther Rocky Mountain erigerons of such 

 signal beauty, gathered the comparatively homely E. glabel- 

 lus, though not in typical form, in the Black Hills of South 



Dakota. With something very like the real ^/a^^/Z^^^s — specifi- 



cally the same thing — before him, he was able afterwards, 

 when the great richly colored Colorado mountain E. glabel- 

 lus " came to his knowledge, to segregate it, agreeably to its 

 deserts, as a species. This he did, publishing the fine plant, 

 however, under the poor plebeian name of E. Sntithii. 



I should be glad to be able to take up, at this juncture, the 

 whole subject of Nuttall's E, asper along with glabelhis; but 

 the many scores of sheets of specimens at hand which have 

 been so referred, as I think infelicitously, can not now be 

 studied critically by me for want of time ; but there exist m 

 Colorado and other western mountains here and there some 

 less common types of this alliance hitherto unpublished. 



Erigeron rubicundus. Habit of E. Smithii but a stout 

 plant, and low, barely 6 inches high ; basal leaves 1 inch long, 

 spatulate-obovate, entire, very obtuse, the cauline oblong, 

 acutish, broadest at base and sessile, quite numerous, over- 

 reaching one another in their suberect attitude, all super- 

 ficially glabrous except as showing some long hairs on the 

 midvein beneath, the margins rather strongly hairy ; stem 

 stiffly short-hirsute throughout : involucral bracts in two equal 

 series, hirsute below the middle, above somewhat strigulose, 

 but with also a denser investiture that is glandular-scaberu- 

 lous : rays 100 or more, deep-pink, or almost rose-color, not of 

 the narrowest, the spread of them in the expanded head I A 



I 



inches. 



