212 LEAPI.ETS. 



ally, even there only obscurely pubescent: involucre before 



pressure perhaps low-hemispherical, nearly 72 inch high, at 

 the very base marked by a tuft of hirsute deflexed white hairs, 

 the bracts all equal and hardly biserial, linear, acuminate, from 

 below the middle up the apex rough with scattered blackish 

 hairs but neither glandular nor viscid ; expanded head \% 

 inches across, the rays white, neither narrow as in typical 

 erigeron, nor anywhere nearly as wide as in iS". callianthemus . 



Type specimens in U. S. Herb., collected in Idaho, between 

 Custer and Challis, by L. F. Henderson in 1896. 



Erigeron scaberui^us. Akin to E, glabellus, the simple 



monocephalous stems strictly erect from the very base, a foot 

 high or more, minutely hispid-hirsute throughout, this indu- 

 ment deflexed on the lower part of the stem, elsewhere only 

 horizontally spreading ; leaves numerous, but small for the 

 plant, the basal not 2 inches long, oblanceolate, acutish, 

 entire, of firm texture and upright, the cauline less than an 

 inch long, lance-oblong, acute, erect, sessile, both faces of all 

 foliage setulose-scabrous, the margins closely and stiffly 

 ciliolate : involucre hemispherical, more than Y^ inch broad, the 

 bracts equal, linear, merely acute at tip, the whole series 

 glandular-scaberulous and closely so, without hairiness ; rays 

 very many and narrow, but short for the involucre, the 



^ 



White 



type sheet in U. S. Herb., sheet 496640. 



Several new allies of E, diver gens, chiefly far southeastern, 



are next presented. 



Erigeron GRAcauMus. Root annual, stem strictly erect, 

 simple to near the summit, 10 to 15 inches high : earliest foli- 

 age unknown, leaves nearest the base cuneate-obovate, nar- 



