COMPOSITE. (COMPOSITE FAMILY.) 159 



-* 



lanceolate, with mostly acute and loose herbaceous tips: rays 3 or 4 lines 

 long, violet : akenes pilose-pubescent Mountains of Wyoming and Montana, 

 and far northward. 



2. A. COnSpiCUUS, Lindl. Scabrous : stem 2 feet high, stout, rigid, bear- 

 ing several or numerous corymbosely cymose heads : leaves rigid, ovate, oblong, 

 or the lower obovate, ample, 4 to 6 inches long : involucre about equalling the 

 disk, 5 to 6 lines high ; its bracts in several series, minutely glandular-puberulent, 

 lanceolate, acute, the greenish tips little spreading : rays inch long, violet 

 akenes minuteli/ pubescent. In the mountains, from the Yellowstone north- 

 ward. 



* * Involucre and usually branchlets viscidly-glandular, rather well imbricated: 

 rays 15 to 40, showy, violet to purple: akenes narrow, several-nerved: leaves 

 all entire or the lower with few teeth; cauline all sessile or partly clasping. 

 <- Stem simple : leaves and heads proportionally large : alpine or subalpine. 



3. A. integrifolius, Nutt. Stem afoot or more high, stout, sparsely leafy, 

 villous-pubescent but glabrate, bearing few or several racemed or thyrsoid 

 heads: leaves firm, oblong to spatulate, 4 to 7 inches long; the smaller upper 

 ones lanceolate, half-clasping ; lowest tapering into a long winged petiole : 

 heads inch high : involucre and branchlets viscid-glandular ; its bracts 

 linear, not squarrose : rays bluish purple. From Colorado to Montana and 

 westward. 



4. A. Kingii, Eaton. A span or less high, cespitose: leaves mainly radical, 

 spatulate, entire, or with few sharp teeth, mucronate, thinnish, glabrous or 

 nearly so, 1 to 3 inches long: flowering stems pubescent and above glandular, 

 bearing solitary or 3 to 5 middle-sized heads : involucre 4 or 5 lines high, merely 

 piiberulent-glandnlar, hardly at all viscid ; the bracts linear-lanceolate with at- 

 tenuate and sf/uarrose-spreading green tips: rays white Bot. King Exp. 141. 

 In the Wahsatch Mountains. 



*- H- Stems branching : leaves comparatively small : neither alpine nor subalpine. 



*-* Involucre of the small and scattered heads not squarrose ; the green tips of the 



bracts more or less erect : slender and low species, a span to a foot or less high. 



5. A. campestris, Nutt. Pruinose-pubcrulent and viscidulous, somewhat 

 heavy-scented : leaves linear, about an inch long, a line or two wide, or lower 

 narrowly spatulate, mostly glabrate, some obscurely 3-nerved : involucre 3 or 4 

 lines high, hemispherical, of rather few-ranked and little unequal linear acute 

 bracts: rays 3 or 4 lines long, light violet or purple. From Montana and 

 Idaho to Washington Territory and California. 



6. A. Fendleri, Gray. Rigid, a span to a foot high, sparseli/ hispid n- 

 lous: the linear one-nerved firm leaves hispid-ciliate, otherwise usually smooth 

 and glabrous : involucre somewhat campannlate, 3 lines high ; 0'iter bracts 

 shorter, linear-oblong, obtuse, prui nose-glandular : rays violet, 4 lines long. 

 PI. Fendl. 66. A. Ntittallii, var. Fendleri, Gray. Plains and sand-hills, from 

 W. Kansas to S. Colorado and N. New Mexico. 



++ ** Involucre of middle-sized heads well imbricated ; the unequal bracts with 

 loose squarrose-spreading tips: leaves not rigid, spreading. 



7. A. Novae-AngliSB, L. Stem stout and strict, 2 to 8 feet high, very leafy 

 to the top, coarsely hirsute or hispid with many-jointed hairs t also with glandular 



