812 



COMPOSITAE (COMPOSITE FAMILY) 



Var. GLOMERELLUS (T. & G.) Burgess. Simple or subsimple ; leaves oblong- 

 lanceolate, hispidulous; inflorescences small and axillary, or short, terminal, 

 and spicate. N. Y. to O. and S. C. 



Var. hirsuticaiilis (Lindl.) Porter. Slender; the stem and the midveins of 

 the elongated lanceolate leaves generally villous or hirsute ; branches slender, 

 spreading or ascending, simple. (A. hirsuticaulis Lindl. ) Mostly in low 

 woods and thickets, N. B. to Mich, and Ky. 



Var. bifrons (Gray) Fernald. A luxuriant form, with large thin leaves 

 (1-1.5 dm. long, 2.5-4 cm. wide), and rather larger heads loosely disposed on 

 the spreading branches. (A. diffusus, var. Gray ; A. lateriflorus, var. grandis 

 Porter.) N. Y. to S. C., Mo., and Minn. 



Var. thyrsoideus (Gray) Sheldon. Cinereous-pubescent or glabrate, with 

 ovate-oblong to lanceolate leaves, the branches ascending and often short, and 

 the thyrsoid or spicate-glomerate heads less secund. (A. missouriensis Britton.) 

 N. E. to Ont., Mo., and Tenn. 



H_ n_ H_ H_ Involucre various; the heads when numerous densely or loosely 

 paniculate on erect or ascending branches. 



w- Cauline leaves sessile, but the base not conspicuously cordate nor auriculate, 

 . nor contracted to a 



= Heads small or middle-sized; bracts narrow, in several lengths, the erect 

 green tips not dilated. 



41. A. Tradescanti L. Stem much branched, 0.5-1.6 m. high ; the numerous 



heads (1-1.5 cm. broad) somewhat panicled or racemed ; leaves lanceolate to 

 linear, 5-15 cm. long, tapering to a long slender point ; the 

 lower somewhat serrate in the middle ; involucre 3-5 mm. 

 long ; its bracts linear, acutish, partly green down the back ; 

 rays short and narrow, white or purplish. Low grounds, Me. 

 to Ont. and Minn., s. to Va. and Mo. Aug. -Oct. FIG. 956. 

 Some forms approach no. 39, others differ from A. paniculatus 

 only in the smaller heads and shorter rays. 



42. A. paniculatus Lam. Stem smoothish, 0.5-2. 5m. high, 

 much branched ; the branches and scattered heads (about 2 cm. 

 broad) loosely paniculate ; leaves elongate-oblong to narrowly 

 lanceolate, pointed, somewhat serrate or entire ; the cauline 



956. A. Tradescanti. 0.5-1.5 dm. long, about 1 cm. wide; involucre 8 mm. long; 

 its bracts narrowly linear, ivith attenuate green tips, or the 



outermost wholly green ; rays white or purplish, 6-8 mm. long. Wet meadows, 



thickets, etc., throughout. Aug. -Oct. FIG. 957. Approaches in its different 



forms the preceding and the three following species. Var. 



LANATUS Fernald. Stems densely white-villous or lanate. 



L. Willoughby, Vt., to L. Winnipeg. Var. BELLIDI- 



FL6RUS (Willd.) Burgess. Leaves linear or narrow-lance- 

 olate, mostly entire ; branches ascending, with numerous 



clustered heads. Throughout the range. Var. SIMPLEX 



(Willd.) Burgess. Leaves large and thin, oblong-lance- 

 olate to oblanceolate, the cauline 1-2 dm. long, 2-4 cm. 



wide, entire or slightly serrate ; heads scattered in leafy 



panicles. N. H. to Neb. and Va. Var. ActiTiDENS Burgess. 



Leaves as in the preceding variety, but conspicuously and 



coarsely serrate ; branches short, usually shorter than or 



little exceeding the subtending leaves. Me. to 111., Kan., 



and Ky. Var. CINERASCENS Fernald. Stem closely 



cinereous-puberulent ; leaves dull green, scabrous above, 



lanceolate, with slightly clasping bases, subentire. Me. 



to Mass, and Vt., local. 



43. A. salicifblius Ait. Similar to no. 42 ; the leaves commonly shorter, 



firmer, often scabrous, mostly entire ; involucre more imbricated, the firmer 



linear or linear-oblong bracts with shorter acute or obtusish green tips / heads as 



957. A. paniculatus. 



