COMPOS ITAE (COMPOSITE FAMILY) 



809 



948. 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 lenfest leaves ovate, moder- 

 ately or obscurely cordate, the upper- 

 most sessile and pointed at both ends ; 

 heads larger, in a loose thyrse or 



1)4-.'. A. Druuimoiuiii. 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. COM\TI;S Fernald. Stems, petioles, and lower surfaces of the leaves villous. 



Range of the typical form, local. 



****** Without heart-shaped petiolcd 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, 

 e.i-eept forms of no. 33), and usually pale and 

 glaucous; inrolucral bracts closely imbricated, 

 m iirm <nid u-J/i fish -coriaceous below, green-tipped; 

 leaves firm, usually entire. 



M. Rays violet or blue ; bracts rather abruptly green- 

 fij>j>ed; 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. 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 inrnfxcre 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. AMPLIFOLTT'S 

 Porter. 



30. A. virg^tus Ell. Slender, strict and simple, with 

 i46. A. virtus. tV\v or several racemose or terminal heads, like those of 



044. A. turbtnellus. 



945. A. laevis. 



