COMPOSITAE (COMPOSITE FAMILY) 



809 



943. A. Lindleyanus. 



hairy, with ascending branches bearing numerous 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 oblong 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 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 



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. 

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

 Var. COMA.TUS 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-canescent. 



i- 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. 



++ Hays violet or blue ; bracts rather abruptly green- 

 tipped; leaves on the branchlets reduced to rigid 

 subulate bracts. 



28. A. turbin611us 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, 

 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. ladyis L. Stouter, 0.6-1 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 southw. 



Aug.-Oct. A variable and elegant species. FIG. 945. 

 A form with broad ovate leaves is var. AMPLir6Lius 

 Porter. 



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

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



944. A. turbinellus. 



945. A. laevis. 



