COMPOSITAE (COMPOSITE FAMILY) 



809 



Drummondii. 



A. Lindleyanus, 



hairy, with ascending branches hearing numerous racemose heads; leaves ovate- 

 lacceolate, pointed; the lower lieart-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 loicest 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; 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. 

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

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



— Range of the typical form, local. 



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

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



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

 except forms of no. 38), and usually pale and 

 glaucous; involucral bracts closely imbricated, 

 firm and whitish-coriaceous below, green-tipped ; 

 leaves firm, usually entire. 

 •fv Bays violet or blue ; bracts rather abruptly green- 

 tipped ; leaves on the branchlets reduced to rigid 

 subulate bracts. 

 28. A. turbin^llus 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 south westw. 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 southw. 

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

 A form with broad ovate leaves is var. amplifolius 

 Porter. 



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

 944 A. virgatus. few or several racemose or terminal heads, like those oJ 



944. A. turbinellus. 



945. A. laovls. 



