COMPOSITE. (COMPOSITE FAMILY.) IC)') 



upper from linear to nearly filiform : bracts of the involucre in about 3 series, 

 lanceolate, acute or apiculate, thinnish, scarious-inargiued : rays purple or 

 violet, sometimes white. — Bot. Gazette, ii. 70. JJiplopappus ericoides, Terr. 

 • & Gray. From Kansas and Texas to Utah, Arizona, and California. 



§ 3. Pappus simple: bracts of the involucre imbricated and appressed, destitute 

 of foliaceous or herbaceous tips, often scarious-edyed or more or less dri/: rays 

 fertile: leaves mostli/ entire. — Orthomekis. 



* Involucre well imbricated, of small and nuirow bracts, (jreincr than in others of 



this section : low and slender herbs, leafij-stemmed, branching above ; with lin- 

 ear erect leaves, and several small white-raijed heads : akenes not compressed, 

 very glabrous. 



27. A. ptarmicoides, Torr. & Gray. Rather rigid, 6 to 20 inches high 

 in a tuft, from sniootli to ])ul)('rulent, ])earing a corymbiform cyme of several 

 or numerous heads: leaves firm, linear or the lower spatulate-lanceolate : 

 bracts of the involucre ol)long-lanceolate, obtuse, thickish, rather rigid : rays 

 2 to 4 lines long, broadish : pappus white, of ratlier rigid Itristles, longer 

 ones manifestly clavellate at tip. — From Colorado to the Saskatchewan and 

 New England. 



* * Involucre appressed-imbricated in several series of ovate or ovate-lanceolate 



dry chartaceous bracts : akenes compressed, more or less pubescent : stems leafy, 

 bearing several or solitary pedunculate heads. 

 -»- Involucral bracts thin, acute, commonly tomentose (at least when young) : akenes 

 hirsute, becoming glabrate : heads showy, 4 to 6 lines high. 



28. A. Engelmanni, Gray. Rather tall and robust, green, puberulent to 

 glabrous: ledvcs thin, ovate-oblong to broadly lanceolate, 2 to 4 inches long, the 

 larger sometimes with a few small teeth, upjier acuminate : heads ^ inch high : 

 involucral bracts acute or acuminate ; some outer ones partly licrbareuus, or with 

 loose pointed tips ; inner purplish : rays \ inch long. — Am. Jour. Sci. ii. xxxiii. 

 238. A. elegans, var. Engelmanni, Eaton. Mountains of Colorado, Utah, and 

 Wyoming, to tlie Cascades. 



29. A. elegans, Torr. & Gray. Slender, 1 to 3 feet high, mostly scnhro- 

 puberulent : leaves thickish, pale, lanceolate, inch or two long, erect, the U})per 

 apiculate-mucronate : heads several at summit of simple stem or brandies, 

 comparatively small and few-flowered, 4 or 5 lines high : involucral bracts all 

 close and consj)icuonsly ivoolly-ciliate, barely acute, outer ovate, none with jtointed 

 tips : rays rather few, about 4 lines long. — Fl. ii. 159. Mountains of Wyoming 

 and Montana to Nevada and Oregon. 



•*- -t- Involucral bracts firmer , glabrous, all the outer obtuse : iik< nrs merely 

 pubescent : heads stnalier, 3 lines high. 



30. A. glauCUS, Torr. & Gray. Through<mt smooth and glabrous, 

 glaucescent or jcilc : stems a foot high from extonsivoly crocping filiform 

 rootstocks, bruncliing, bearing several or numerous ])aniculate heads : leaves 

 thickish, lanceolate, 1 to 3 inclies long, i to ^ inch broad, rather obtuse : invt>- 

 lucre imbricated in about 3 ranks : rays bright violet, 4 to 6 lines long. — II 

 ii. 150. Mountains of Wyoming to Colorado and Utah. 



