COMPOSITE FAMILY 243 



1. E. pulchellus Michx. Robin's Plantain. Perennial; soft- 

 hairy; stems sometimes throwing out offsets from the base; simple, 

 erect, 1-2 ft. high. Basal leaves obovate-obtuse, somewhat serrate ; 

 stem leaves few, lance-oblong, acute, clasping. Heads rather large, 

 1-9, on long peduncles, with 50-00 long, rather broad, bluish-purple 

 or reddish-pur] )le rays. Thickets and moist banks. 



2. E. philadelphicus L. Perennial; rather hairy; stems slender, 

 about 2 ft. high. Basal leaves spatulate and toothed ; stem leaves 

 usually entire and strongly clasj'iing, sometimes with a heart-shaped 

 or eared base. Heads several, small, long-petioled ; rays exceedingly 

 numerous, thread-like, reddish-purple or flesh color. In damp soil. 



3. E. annuus Pers. Common Fleabane. Annual or biennial. 

 Stem grooved and stout, branching, 2-5 ft. high, with scattered 

 hairs. Lowest leaves petioled, ovate, coarsely toothed; those higher 

 up the stem successively narrower, sessile. Heads in a large, loose 

 corymb; rays short, white or purplish. Fields and waste ground. 



4. E. ramosus BSP. Daisy Fleabane. Annual or biennial. 

 Considerably resembling the preceding species, but with entire 

 leaves, smaller and less branched stem, smaller heads, and longer 

 rays. Fields and pastures. 



5. E. canadensis L. Horseweed, Butterweed, Colt's Tail. 

 Annual; stem erect, 1-5 ft. high. Leaves linear, those of the stem 

 entire. Heads very numerous and small, panicled ; the w^hite rays 

 hardly longer than the pappus. A common and troublesome weed. 



III. ANTENNARIA Gaertu. 



Perennial woolly herbs. Le'aves partly basal, the stem leaves 

 alternate. Heads small, many-flowered, dioecious ; the flowers 

 all tubular. Involucre of thin, dry, white or colored bracts, 

 imbricated in several series. Eeceptacle convex or fiat, with- 

 out chatf. Pistillate flowers with very slender tubular corollas 

 and abundant pappus of hair-like, naked bristles, somewhat 

 united at the base ; pappus of the sterile flowers thickened 

 and club-shaped at the tips. Akenes small, cylindrical or 

 flattish. 



1. A. Parlinii Fernald. Stolons ascending, leafy througliout; stems 

 rather stout, at length 12-20 in. high, they and the stem leaves nu)re 

 or less downy with i)urj)lish glandular hairs. Basal leaves and those 

 at the tips of the stolons at length smooth and bright green above ; 

 lower stem leaves abundant, oblong or narrower, obtuse or nearly so. 

 Heads corymbed. Style at length crimson. Ilicli soil, frequently in 

 open woods. 



