COMPOSITAE (COMPOSITE FAMILY) 



809 



942. A. Drummondii. 



943. A. Lindleyanus. 



hairy, with nscendinci hranches hearing ninnerons racemose heads,' leaves ovate- 

 lanceolate, pointed; the lower heart-shaped at base, on margined petioles; the 



upper lanceolate or linear, pointed at both ends ; bracts of 

 the ohlong involucre linear^ tapering into awl-shaped slender 

 and loose tips. — Dry ground, Vt. to Ky., and westw. Aug.- 

 Oct. — Heads rather larger than in no. 23. Fig, 941. 



26. A. Drumm6ndii Lindl. Pale v'ith fine gray pubes- 

 cence; leaves cordate to cordate-lanceolate, mostly on mar- 

 gined petioles, the uppermost lanceolate 

 and sessile ; bracts acute or acutish. — 

 Open ground, etc., 111. to Minn, and 

 Tex. Aug.-Oct. Fig. 942. — Passing 

 into the preceding. 



27. A. Lindleyanus T. & G. Eather 

 stout, 3-10 dm. high, nearly glabrous ; 

 radical and lowest leaves ovate., moder- 

 ately or obscurely cordate., the upper- 

 most sessile and pointed at both ends ; 

 heads larger., in a loose thyrse or 

 panicle, the linear-attenuate bracts 

 looser and less imbricated; ravs blue- 



violet. — Thickets and open places. Lab. to ^Mackenzie, 

 s. to N. B., n. N. E., Mich., S. Dak., and Mont. Aug.-Oct. Fig. 943. Var. 

 ExiMius Burgess. Tall (often 2 m, high); leaves harsh above. — N. Y. and 0. 

 Var. coMATUs Fernald. Stems, petioles, and lower surfaces of the leaves villous. 



— Range of the typical form, local. 



****** Withoiit heart-shaped petioled leaves, the radical and lower all acute 

 or attenuate at base ; not glandular nor viscid, nor silky-canescent. 



•»- Smooth and glabrous throughout (or nearly so, 

 except forms of no. 33), and usiially pale and 

 glaucous; involucral bracts closely imbricated, 

 firm and ichitish-coriaceous below, green-tipped ; 

 leaves firm, usually entire. 



** Bays violet or blue; bracts rather abruptly green- 

 tipped; leaves on the branchlets reduced to rigid 

 subulate bracts. 



28. A. turbinellus Lindl. Stem slender, 0.5-1 m. 

 high, paniculately branched ; leaves oblong to narrowly 

 lanceolate, tapering to each end, with rough margins ; 

 involucre elongated-obconical or almost club-shaped, 

 9mm. or more in length; the bracts linear, with very short 

 and blunt green tips ; rays violet-blue ; achenes nearly smooth. 



— Dry hills, etc.. 111. to Neb., and southwestw. Sept., Oct. 



— Well marked and handsome. Fig. 944. 



29. A. laevis L. Stouter, 0.5-1 m. 

 high ; heads in a close panicle ; leaves 

 thickish, lanceolate or ovate-lanceolate, 

 chiefly entire, the upper more or less 

 clasping by an auricled or heart-shaped 

 base ; bracts of the short-obovoid or 

 hemispherical involucre with short 

 abrupt green tips ; rays blue-violet 

 (rarely white) ; achenes smooth. — Dry 

 soil, Me. to Ont., westw. and south w. 

 Aug.-Oct. — A variable and elegant species. 

 A form with broad ovate leaves is var. AMn.iFoi.irs 

 Poi:ter. 



30. A. virgatus Ell. Slender, strict and simple, with 

 946. A. Tirgatus. few or several racemose or terminal heads, like those oJ 



944. A. turbinelhis. 



945. A. laevis. 



Fig. 945. 



