196 I^EAFLETS, 



name. 



tributed to U. S. Herb 

 lector's number 5387. 



under the col- 



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cauline leaves oval, sessile, obtuse, or in some specimens ob- 

 lanceolate and acute, both faces of all sparsely scabrous and 

 the margins scabrous-ciliolate, very closely so : heads large, 

 in the more robust 5 or 6 and corymbose, in others 1 or 2, their 

 peduncles with a bract or two : bracts of involucre rather 

 short, all densely strigose ; rays numerous, light purple, not 

 very narrow ; outer pappus obscure, made up of very short 

 bristles. 



Plant common on the San Francisco Mountain, northern 

 Arizona ; distributed perhaps first by J. G. lycmmon in 1884, ^ 



later by C. A. Purpus in 1900, the specimens by the latter 

 distributed for E. glabellus, of the former for E. macranthiis. -^ 



The low robust growth, firm pale rough foliage, besides the 

 floral characters abundantly distinguish this from its northern 

 ally, which is E. glabellus. I collected a good series of speci- 

 mens of the plant, near the base of the mountain, in 1889, 

 and they have until now remained in my herbarium without a 



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Erigeron ELDEnsis. Of the group of E. glabellus, but 

 less resembling it habitally, the stems tall, to the height of 

 more than a foot, slender and very erect from the base, proba- 

 bly not clustered but growing singly : basal leaves 3 inches 

 high or less, including the long slender petiole, the blades 

 oval and obtuse to elliptical and acutish, those of the stem an 

 inch long more or less, broadly to narrowly lanceolate, sessile, 

 very acute, all the foliage of very thin texture and glabrous 

 except as to the not very strongly scabrous-serrulate margins : 

 heads 1 to 3, when 2 or 3 the lateral far surpassing the ter- 

 minal : bracts of involucre rather few, equal, slender and 

 acuminate, only very obscurely scabrous-puberulent ; rays 

 purple, narrow, not excessively numerous; outer pappus of ■ ^ 



extremely small and narrow squamellae or bristles. 



Canons and slopes of Elden Mesa, northern Arizona, at 

 6600 feet, collected by J. B. Leiberg, 11 Aug., 1901 ; dis- 



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