SOME ERIGERON SEGREGATES. 195 



& 



where glabrous except as to a minute marginal series of stiff 

 incurved hairs ; the cauline more than an inch long, quite 

 crowded on the upper two-thirds of the stem, oblong-lanceolate, 

 sessile, very acute, not ciliolate, every part showing under a 

 lens a minute roughness of glandular points, this extending 

 equally to the stem and peduncles as well as bracts of the 

 involucre : heads large, only 2 or 3 and short-peduncled at the 

 very apex of the stem ; bracts of involucre devoid of pubes- 

 cence, showing an herbaceous mid vein between the two definite 

 scarious margins, only a few of the outer somewhat shorter 

 and wholly herbaceous: rays very narrow, blue-purple : squa- 

 mellae of the pappus minute, nearly subulate. 



Near Fort Huachuca in extreme southern Arizona, Sept., 

 1891. Dr. T. E. Wilcox : tvoe in U. S. Herb. 



Erigeron GuuELMi. Related to E, glabclhis, but smaller, 

 the decumbent and almost leafy stems a foot high from a 

 subligneous and branched caudex : basal leaves 1 to 1>^ inches 

 long including the rather short petiole, in outline cuneate- 

 oblong, very obtuse, of firm texture, but glabrous on both 

 faces, yet both blades and petioles strongly short-ciliate with 

 curved hairs ; stem monocephalous, naked above the middle, 

 below it with here and there a reduced and sessile oblong- 

 linear leaf : bracts of involucre linear, acuminate, herbaceous, 

 glandular-viscid : rays very numerous but not narrow, yet not 

 of the broadest : no heads mature, therefore achenes and 

 pappus not seen. 



Well marked, and known only as collected on Bill William 

 Mountain, northern Arizona, by the late Dr. Edward Palmer 

 in 1869 ; type in U. S. Herb, 



4 



Erigeron subasper . Of the general aspect of E. glabellus, 

 much smaller, stout, rigid, all the herbage firmer, and of a 

 pallid, rather than vivid green: basal leaves 15^ to 3 inches 

 long, erect, somewhat obovate-spatulate, tapering to a flat and 

 not very narrow petiole, the limb very obtuse, mucronate ; 



