816 



COMPOSITAE (COMPOSITE FAMILY) 



971. A. nemoralis. 



heads few-several; rays 12-18, white, or slightl:^^ purple. —Cool rich woods, 



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



A monstrous form occurs in N. E. and N. Y. having a 



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, veiy 

 leafy, 2-6 dm. high ; leaves small (2-4 cm. long), rather 

 rigid, lanceolate, nearly entire, loith revolute margins; 

 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 

 F 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. tenuifblius L. Very glabrous; stem often 

 zigzag, simple or forked, 1.5-6 dm. high; heads rather 

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

 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. Aug. -Oct. 

 Fig. 972. 



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

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

 annuals, with numerous small heads and narrow 

 entire leaves, 

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

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

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

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

 what in two rows, short, not project- 

 ing beyond the disk, more numerous 

 than the disk-flowers, purplish. — Salt 

 Late July-Oct. 



subulatus. 



marshes on the coast. 

 Fig. 973. 



e. N. B. ; N. H. to Fla. 



C0NYZ6pSIS T. & G. Bracts of the 

 campanulate involucre in 2-3 rows, nearly 

 equal, linear, the outer foliaceous and 

 loose ; pappus copious, very soft ; rays very 

 short or none; low annuals, with numer- 

 ous rather small heads. 



974. A. angustus. 



58. A. angiistus (Lindl.) T. & G. Branch- 

 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-flowers reduced to a tube, much 

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

 Alkaline soil, lower St. Lawrence R., Que.; Minn, to Sask., 

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

 (Siber.) Fig. 974. 



59. A. frond6sus (Nutt.) T. & G. Similar ; leaves linear-oblanceolate to 

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



975. A. frondosus 



