816 



COMPOSITAE (COMPOSITE FAMILY; 



971. A. nemoralis. 



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

 Lab. to Out., 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, very 

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

 rigid, lanceolate, nearly entire, with revolute margins; 

 heads 1-3 (-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. tenuif61ius 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, 972 A tenu i fo i iu8 

 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. OXYTRIP6LIUM (DC.) T. & G. Involucre as 

 in 6; pappus simple, fine and soft; glabrous 

 annuals, with 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-flowers, purplish. Salt 



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

 FIG. 973. 



CONYZ6PSIS T. & G. Bracts of the 

 campanulate involucre in 2-8 row, nearly 

 equal, linear, the outer fuHm-mns <nul 

 loose ; pappus copious, very soft ; ray* ''>>/ 

 short or none ; low annuals, with numer- 

 ous rather small he<i*. 



973. A. subulatus. 



8. 



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



! 



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

 entire, more or less short-ciliate ; involucral br<i<-f$ */// linear, 

 acute; corolla of the ray-Jlowers reduced to a tube, much 

 shorter than the elo>i</nfl *////<. (Brachyactis Britton.) 

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



975. A.frondosus. 



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

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



