810 



COMPOSITAE (COMPOSITE FAMILY) 



the last ; leaves lanceolate or linear, the lower ttsually long and narroio. 



(A. piirpuratus Nees.) — Va., W. Va.. and soutliw. Sept., Oct. Fig. 946. 



^ 81. A. concinnus Willd. Not glaucous, slender, 3-9 dm. 



high ; leaves lanceolate, mostly somewhat serrate, the lowest 

 spatulate-lanceolate on winged petioles ; heads smaller than in 

 no. 29, numerous, panicled; 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 lohite, rarely pui^lish ; bracts narroio, subulately 

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

 the branchlcts lax and attenuate. 



947. 



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

 '^oncinnus. yjj,gj^^g branches ; cauline leaves lanceolate or linear, 0.5-1 dm, 

 long ; heads pa,niculate ; 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 

 branchlpts or peduncles racemo.se 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 6 mm. high or less; iiivohicre hemispheric or 

 campanulate; bracts often nearly equal, with attenuate or 

 aid-shaped green tips. — Dry, open places, N. E. to Out., 

 Minn., and southw. Aug.-Oct. Fig. 949. Var. villosus 943. a. polyphyllus. 

 T. & G. Similar, but the stem and generally the narrow leaves 



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

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

 branches and rather small scattered mostly solitary heads. 

 {A. Pringlei Rrilton.) — 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 a^in the typical form, but larger. — 

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



34. A. depauperatus (Porter) Fernald. Slender, glabrous, 

 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 less rigid than those of the preceding species. (^A. 

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

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

 ^ept. Fig. 950. 



Var. parviceps (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. 



H- -♦- Hoary-pubescent or hirsute ; herbaceotis tips of the 

 more or less bristJy-ciliatc involucral bracts squarrose 

 or spreading; cauline leaves small, linear, entire, 

 scarcely narrowed at the sessile or j^artly clasping base; 

 heads numerous, small, racemose 



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

 right, much branched, })ul)('ruh'iit or somewhat hirsute ; 

 V61. A. amethystinus. leaves not rigid; heads mm. high; the tij^s of the bracts 



949. A. ericoides. 



9f)0. A. depauperatus. 



