COMPOSITE. (COMPOSITE family.) 149 



brous : scapiform flowering stems an inch to a span high, mostly monocepha- 

 lous : brads of the involucre from ovate to ovate-lanceolate, mucronately acute or 

 acuminate, destitute of greenish tips ; the outer » little shorter than the inner. 

 — Proc. Am. Acad. vii. 353. In the mountains from the Saskatchewan to 

 California and Oregon. 



Var. glabratus, Eaton. Glabrous and smooth or nearly so : flowering 

 stems disposed to be leafy above and to branch, so bearing 2 or 3 heads. — 

 Bot. King Exp. 161. Wyoming to Nevada and Arizona. 



15. A. armerioides, Gray. Smooth and glabrous : flowering stems 

 naked above for 1 to 3 inches, sometimes nearly scapiform : bracts of the 

 campanulate involucre broadlij oval, rounded-obtuse or retuse, muticous, of about 

 three lengths ; the outermost much shorter, most of them greenish at apex. — 

 Kocks on mountains, from Wyoming to New Mexico and S. Utah. 



* * * Heads mostly solitary, terminating leafy branches : involucre of lanceolate 



or linear bracts in few ranks and of somewhat equal length ; outer with con- 

 spicuous leafy tips, or loose and foliaceous, passing into leaves : rays few and 

 conspicuous, or wanting : pappus soft and slender : low and many-stemmed 

 from u, suffrutescent base : leaves soft, spatulate-oblong to broadly linear, ses- 

 sile, entire. 



16. A. SUffrutieoSUS, Gray. Destitute of tomentum: stems glandular- 

 pubescent or puberulent : heads f to f inch high : rays 2 to 5 and somewhat 

 exserted, or none : disk-flowers 10 to 30. — Proc. Am. Acad. vi. 542. Alpine 

 or subalpine, from California to Oregon and N. Wyoming. 



17. A. Macronema, Gray. Stems stouter, whitened by a dense and 

 close tomentum : head commonly larger, one inch long : rays always wanting. — 

 Loc. cit. Mountains of Colorado, Wyoming, and westward. 



10. BIGELOVIA, DC. Rayless Golden-rod. 



Mostly suffrutescent or more shrubby plants, generally few-flowered, but 

 grading easily into both Solidago and Aplopappus. Includes Linosyris. 



# Heads comparatively large, at least £ inch long, but narrow, 5 to 20-ftowered : 



bracts of the involucre chartaceous and acuminate, some of the outer prolonged 

 into a slender herbaceous tip ; when numerous the vertical ranks are more or 

 less apparent : low and suffrutescent, with linear entire leaves, not punctate 

 nor viscid. 

 •i- Style-appendages conspicuously exserted: akenes pubescent: stems and 

 branches whitened (at least when young) by a close tomentum. 



1. B. Pavryi, Gray. Stems rather strict, leafy to the summit: leaves 

 linear, 2 or 3 inches long, 2 lines or less wide, obscurely 3-nerved, glabrous; 

 upper ones hardly diminished in size and overtopping all the heads of the 

 strict and narrow thyrsiform-virgate panicle: heads 10 to \h-ftowered : bracts of 

 the involucre about 12. — Parks of the Colorado mountains. 



2. B. Howardi, Gray. Low, rather tufted, canescently tomentulose 

 when young : leaves narrowly linear, rigid, an inch or two long, barely a line 

 wide, obscurely \-nerved ; upper mostly overtopping the glomerate narrow 

 heads: involucre 5-flowered ; its bracts 15 to 18.— Proc. Am. Acad. viii. 641 

 Parks of the Colorado mountains to New Mexico and Utah. 



