804 



COMPOStTAE (COMPOSITE FAMILY) 



92(1. A. furcatus. 



921. A. gloraeratus. 



(A. corymhosus Ait.) — Woodlands, s. Me. and w. Que. to L. Superior, s. to Ga. 



Aug.-Oct. Fig. 919. — Extremely variable in outline of foliage, intensity of 

 ^ coloring of disk-flowers, etc., characters upon which Professor 



|'\ E. S. Burgess proposes as separable species A. carmesinua, 



' A. tenebrosiis, and 26 others. 



■w- ++ Leaves thick, rough above. 



= Headsfeio, large (1-1.5 cm. high). 



3. A. furc&tus Burgess. Stem slender, 3-6 dm. high, almost 

 uniformly leafy to the slightly forked summit ; leaves ovate or 

 elliptic, acuminate, coarsely serrate, lower shorf^petioled and 

 slightly cordate, upper mostly sessile, often with broad-winged 

 laciniate bases; involucre of 4-5 series of pubescent pale green 

 regularly imbricated blunt bracts, the outer oblong, the inner 

 linear, all with dark tips ; rays 1 cm. or more long, narrow. 

 — Woods and rocky shaded banks. 111. and Mo. Aug. -Oct. Fig. 920. 



= = Heads smaller {hardly 1 cm. high), numerous in corymbose or subumbel- 

 late clusters at the tips of the branches. 



4. A. glomer^tus Bernh. Rather stout, 4.5-9 dm. high; 

 stem smooth, or pilose toward the summit ; leaves pilose 

 beneath or glabrate ; the lower broadly ovate, acuminate, long- 

 pet ioled ; the upper gradually smaller and narrower, on winged 

 petioles or sessile ; invohtcre green, broadly campanulate ; bracts 

 ciliate, dark-tipped, the inner ones slightly elongated, scarious 

 only on the margins ; rays short, rarely 0.5 cm. long'. — Thick- 

 ets and wooded banks. Me. to Va. Aug., Sept. Fig. 921. 



■1- -1- Involucre slender, cylindric; bracts thin and scarious (loose and spreading 

 when dry) , the innermost much exceeding the next outer series ; large tufted 

 basal leaves abundant. 



5. A. Schreberi Nees. Resembling the preceding ; stem smooth or pilose ; 

 leaves thin, often pilose on the petioles and veins beneath, smooth or harsh 



above ; basal ones large, when well developed vrith broad 

 rectangular sinuses ; involucre slightly imbricated ; rays 

 1 cm. long. (Including A CM}-))escens Burgess.) — Damp 

 woods and thickets, N. E. to Va. July-Sept. Fig. 922. 



* * Bays violet or blue (rarely white) ; branches of the 

 infloresence glandular. 



6. A. macrophyllus L. Rather coarse, 0.3-1.5 m. 

 high, viscid-glandular at least in the inflorescence; 

 sterile tufts of large ovate cordate leaves abundant ; basal leaves large, cordate ; 

 the upper of various forins, usually smaller and naiTower ; involucre generally 

 3^-sei'iate ; bracts greenish, the outer short-ovate, blunt, and 

 pubescent; the inner elongated, linear, more scarious, some- 

 times roseate-tinged on the margins. — An extremely variable 

 plant, from which several forms are separated, by some 

 authors, as species. — The typical plant is simple, 3-9 dm. 

 high, characterized by thick harsh foliage, stout rather 

 smooth stem, and broad terminal corymbose inflorescence 

 with many conspicuous stipitate glands. (Including A. ros- 

 cidus, .etc.. Burgess.) — Open woods and thickets, N. B. to 

 Minn, and N. C. Aug., Sept. Fig. 928. The following 

 varieties include the best-marked extremes. Var. piNGciF6Lins Burgess. Stem 

 glabrous, 5-6 dm. high ; many of the ba.ml leaves very smooth (almost greasy), 

 others scabrous at least in spots. — Me. to N. Y. and westw. Var. excelsior 

 Burgess. Stem sraoothish, 1 m. or so high, glaucous • leaves pale, for the most 

 part narrowly ovate, oblong, or lanceolate ; bracts elongated. — N. H. to Ont. 

 and Mich. Var. vELtriNUS Burgess. Stems villous-pubescent ; leaves pilose 



922, A . Schreberi. 



A. macrophyllus. 



