806 



COMPOSITAB (COiMPOSlTK FAMILY) 



veined, 



closely sessile, 5-8om. long, nearly uniform ; heads 1-40 ; bracts of bell 

 involucre oblong, obtuse, appressed, clearly in several series, with very 

 short and slightly spreading herbaceous ciliate tips; rays pale 

 violet; aohenes smooth. — Bogs and low woods, Nfd. to Del. and 

 w. Va. July-Sept. Fig. 928. 



Var. strictus (Pursh) Gray. Slender, 1-8 dm. high ; heads 

 1-8 ; iuvoluoral bracts more foliaoeous, acute or acutish., nearly 

 equal. (Var. biflonis Porter.) — Damp rooky or mossy places, 

 n. Lab. and Hudson B. to Nfd., N. B., and n. N. E. 



* * Involucre and usually the branehlets viscid- or pruinese- 

 glandular, well imbricated or loose ; pubescence not silky ; 

 leaves entire {or the lower with few teeth), the cauline all 

 sessile or clasping ; rays shoicy, violet to purple; involucral 

 bracts spreading, in few or many ranks. 



928. A. radula. 



A. ffrandifloras, 



12. A. grandiflbrus L. Minutely 

 hispid; stems slender, loosely much 

 branched, 3-9 dm. high; leaves very small (0.5-4 cm. 

 long), oblong-linear, obtuse, rigid, the uppermost 

 passing into bracts of the hemispherical squarrose 

 many-ranked involucre ; rays bright violet, 2.5 cm. 

 long; achenes hairy. — Dry open places, Va., and 

 soutliw. — Heads large and very showy. Fig. 929. 



13. A. oblongifblius Nutt. Minutely glandular- 

 puberulent, much branched above, rigid, paniculate- 

 corymbose, 3-7 dm. high ; leaves narrowly oblong br 

 lanceolate, muoronate-pointed, partly clasping, thiok- 

 ish, 2.5-5 cm. long, 0.5-1 cm. wide ; involucral bracts 



nearly equal, broadly linear, appressed at the base ; rays 

 violet-purple; achenes canescent. — Bluffs and rocky banks, 

 Pa. and Va. to Minn, and Kan. Sept., Oct. — Heads middle- 

 sized or smaller. Fig. 930. 



Var. rigidulus Gray. Low, rarely more than 3 dm. high, 

 with more rigid and hispidulous-soabrous leaves. {A. Kum- 

 leini Fries.) — More exposed situations, 111., Wise, and 

 southwestw. Late July-Oct. 



14. A. nbvae-dngliae L. Stem stout, hairy, 0.5-2.5 m. 

 high, corymbed at the summit; leaves numerous, lanceolate, 

 entire, acute, auriculate-clasping , 

 A. oblongifollus. clothed with minute pubescence, 0.5- 

 1 dm. long ; bracts nearly equal, 

 linear-awl-shaped, loose, glandular-viscid, as well as 

 the branehlets ; rays violet-purple, rarely white, very 

 numerous; achenes hairy. — Moist chiefly calcareous 

 grounds, centr. Me. to w. Que., westw. and southw. 

 Aug.-Oct. — Heads large ; a vei-y handsome species, 

 popular in cultivation. (Escaped 

 from gardens, and locally natu- 

 ralized in Eu.) Fig. 931. Var. 

 r6seus (Desf.) DC. Rays pink 

 or rose-color. — Range of the typ- 

 ical form, local. 



15. A. mod^stus Lindl. Pu- 

 bescent or glabrate ; stem slender, 



simple, with few large heads terminating slender branch- 

 lets; leaves lanceolate, very acute, narrowed to a sessile, 

 base, sparingly serrate or serrulate ; bracts linear-attenuate, 

 equal, mostly herbaceous ; rays dark violet. (A. major 

 Portor.) — Rich soil, w. Out. and n. Minn, to B. C. and 

 Ore. July-Sept. Fig. 932. 



A. liovae-angHae. 



A. modestus. 



