816 



COMPOSITAE (composite FAMILY) 



heads few-several; rays 12-18, white, or slightly purple. — Cool rirh woods, 

 Lab. to Out., Pa., and southw. along the Alleghenies. June-Sept. Fig. 970. — 



A monstrous form occurs in N. K. and N. Y. having ;i 

 chaffy receptacle and the flowers turned to tufts of chaffy 

 paleae. 



55. A. nemoralis Ait. Minutely rough ish -pubescent ; 

 stem slender, simple or corymbose at the summit, very 

 leafy, 2-0 dm. high ; leaves small (2-4 cm. long), rather 

 rigid, lanceolate, nearly entire, with revolute marc/ins; 

 heads l-o (-12) ; bracts of the inversely conical involucre 

 narrowly linear-lanceolate, the outer awl-shaped ; rays 

 lilac-purple, elongated. — Bogs and 

 swamps, Nfd. to Hudson B., s. to 

 N. J., n. N. Y., and e. Ont., chiefly 

 coastal. July-Sept. Fig. 971. 

 Passing to 

 Var. Blakei Porter. Leaves larger (1-2 cm. wide), 

 oblong-lanceolate, toothed ; heads few-many. — N. S. to 

 N. Y. and N. J. — A very showy plant about equally 

 related to this and the preceding species, and not clearly 

 distinct from either. 



56. A. tenuif51ius L. Very glabrous ; stem often 

 zigzag, simple or forked, 1.5-0 dm. high ; heads rather 

 large, 1 cm. high, terminal ; leaves few, long-linear, 

 tapering to both ends, rather thick and fleshy, entire, the 

 upper subulate, pointed ; involucre top-shaped, the bracts subulate-lanceolate 



with attenuate acute points ; rays large, numerous, 

 pale purple. — Salt marshes, Mass. to Fla. 

 Fig. 972. 



9T1. A. nemoralis. 



972. A. tenuifolius. 



Aug. -Oct. 



marshes 

 Fig. 97:^. 



§ 7. OXYTRIPOLIUM (DC.) T. & G. Involucre as 

 in § 6 ; pappus simple, fine and soft ; glabrous 

 annuals, vjith numerous small heads and narrow 

 entire leaves. 



57. A. subulatus Michx. Stem 0.2-1.5 m. high; 

 leaves linear-lanceolate, pointed, flat, on the branches 

 awl-shaped ; bracts of the subcylindric involucre (7-8 

 mm. high) linear-awl-.shaped, in few rows ; rays some- 

 what in two rows, .short, not project- 

 ing beyond the disk, more numerous 

 than the disk-flowei.s, purplish. — Salt 

 on the coast, e. N. B.; N. H. to Fla. Late July-Oct. 



973. A. subulatus. 



§ 8. C0NYZ6pSIS T. & G. Bracts of the 

 campanulate involucre in 2-3 rows, nearly 

 equal, linear, the outer foliareous and 

 loose ; pappus copious, very soft ; rays very 

 short or none; loio annuals, with numer- 

 ous rather small heads. 



58. A. angustus (Lindl.) T. & G. Branch- ^''*' ^■^"^"^^"s- 

 ing, 1.5-6 dm. high, nearly glabrous ; leaves linear-attenuate, 

 entire, more or less short-ciliate ; involucral bracts all linear, 

 acute; corolla of the ray-fl<nvers reduced to a tube, m^ich 

 shorter than the elongated style. (Brachyactis Britton.) — 

 Alkaline soil, lower St. Lawrence K., Que.; Minn, to Sa.sk., 

 . f , and westw., spreading east to Chicago, etc. Aug., Sept. 



A. lron.lo.sus. ^^-^^^^.^ y^^ (,74 



59. A. frondbsus (Nutt.) T. & G. Similar ; leaves linear-oblanceolate to 

 spatulate, blunt, ciliolate only at base ; outer involucral bracts oblona to 



975. 



