COMPOSITAE (COMPOSITE FAMILY) 



809 



943. A. Lindleyanus. 



hairy, with ascending branches bearing numerous racemose heads; leaves ovate 

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

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

 the oblong involucre linear, tapering into awl-shaped slevder 

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

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



26. A. Drummfindil Lindl. Pale with 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. Rather 

 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 



942. A. Drummondii. panicle, the linear-attenuate bracts 

 looser and less imbricated ; rays 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. 

 ExfMics Burgess. Tall (often 2 m. high); leaves harsh above." — N. Y. and O. 

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



— Range of the typical form, local. 



* * *.* * * Without heart-shaped petioled leaves, the radical and lower all acute 

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



1- Smooth and glabrous throughout (or nearly so, 

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

 glaucous; involucral bracts closely imbricated, 

 firm and whitish-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. turbinfillus Lindl. Stem slender, 0.6-1 m. 

 high, paniculately branched ; leaves oblong to narrowly 

 lanceolate, tapering to each end, with rough margins ; 

 involucre elongated-obconical or almost club-shaped, 

 9 mm. 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. laSvis L. Stouter, 0.5-1 m. 

 high ; heads in a close panicle ; leaves 

 thickish, lanceolate or ovate-lanceolate, 

 chieily entire, the upper more or less 

 clasping by an aurioled 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 southw. 

 Aug.-Oct. — A variable and elegant species. Fig. 945. 

 A form with broad ovate leaves is var. amplif6lius 

 Porter. 



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

 946. A. virgatus. few or several racemose or terminal heads, like those ol 



944. A. turbinellus. 



945. A. laevis. 



