810 



COMPOSITAB (COMPOSITE FAMILY) 



947. A. concinnus. 



the last ; leaves lanceolate or linear, the lower usually long and narrow. 

 (A. purpuratus Nees.) — Va., W. Va., and southw. Sept., Oct. Fig. 946. 



31. A. concinnus Willd. Not glaucous, slender, 3-9 dm. 

 high ; leaves lanceolate, mostly somewhat serrate, the lowest 

 spatulate-lanceolate on winged petioles ; heaSi smaller than in 

 no. 29, numerous, panieled; bracts of involucre loose, with 

 more herbaceous narrower green tips; rays violet. — Rocky 

 woods, rare, Ct., and southw. Aug., Sept. — An ambiguous 

 species. Fig. 947. 



■" ** Bays white, rarely purplish; bracts narroio, subulately 

 green-tipped; leaves mostly narrow, narrowed at base, on 

 the branchlets lax and attenuate. 



32. A. polyphyllus Willd. Low or tall, 1-15 dm. high, with 

 virgate branches; oauline leaves lanceolate or linear, 0.5-1 dm, 



long ; heads paniculate ; bracts lanceolate-subulate, the outer- 

 most much shorter ; rays 1 cm. long. (A. Faxoni Porter). — 

 Rocky or gravelly soil, e. Me. and n. Vt. to Ont., Wise, and 

 southw. Aug.-Oct. Fig. 948. — Heads larger than in the 

 next. 



33. A. ericoides L. Smooth, 3-9 dm. high; the simple 

 branchlets or peduncles racemose along the upper side of the 

 wand-like spreading branches ; lowest leaves oblong-spatulate, 

 sometimes toothed ; the others linear-lanceolate or linear-awl- 

 shaped ; heads Q mm. high or less; invohicre hemispheric or 

 campanulate; bracts often nearly equal, with attenuate or 

 awl-shaped green tips. — Dry open places, N. E. to Ont., 

 Minn., and southw. Aug.-Oct. Fig. 949. Var. vill6sl-s ^^g ^ Dolvohvllus 

 T. & G. Similar, but the stem and generally the narrow leaves ' • P ' P ^ • 



villous-hirsute. (Var. pilosus Porter.) — Same range. Yar. 



PRfNGLEi Gray. A low slender northern form, with few erect 



branches and rather small scattered mostly solitary heads. 



{A. Pringlei Britton.) — Me. to Ont., s. to Mass. and Wise. 

 Var. platyphyllus T. & G. Stout; stem and branches 



densely white-villous ; leaves lanceolate or oblong-lanceolate, 



mostly pubescent ; heads as in the typical form, but larger. — 



O. to Mich., 111., and southw. 



34. A. depauperiltus (Porter) Fernald. 



1-4 dm. high ; basal leaves small, spatulate ; 



stem-leaves linear, those of the branches 



linear-subulate ; heads small, 4-5 mm. high, 

 terminating the slender divaricate branches ; involucre tur- 

 binate, 2-3 mm. broad, of about 20 linear-subulate bracts, 

 these leas rigid than those of the preceding species. (^A. 

 ericoidea, var. pusillus Gray, and var. depauperatus Porter.) 

 — Seroentine barrens, s. Pa. and adjacent W. Va. July- 

 ilept. Fig. 960. 



Var. pdrviceps (Burgess) Fernald. Stout, pilose, 3-7 

 dm. high ; leaves linear or lanceolate ; heads rather crowded. 



{A. ericoides, var. Burgess.) — Prairies and woods. 111. 

 and Mo. 



t- 1- Hoary-pubeseent or hirsute ; herbaceous tips of the 

 more or less bristly-ciliate involucral bracts squarrose 

 or spreading; cauline leaves small, linear, entire, 

 scarcely narrowed at the se.isile or partly clasping base; 

 heads numerous, small, racemose. 



35. A. amethystinus Nutt. Tall (0.5-1.5 in. high), up- 

 right, much branched, puberulent or somewhat hirsute ; 

 leaves not rigid; heads mm. high ; the tips of the bracts 



Slender, glabrous, 



A. fliicoides. 



A. depauper.^tus. 



2rtU. A. amethystinus. 



