DICOTYLEDONOUS PLANTS 229 



Akenes flattish, crowned with a single row of hair-like bristles, 

 or sometimes with shorter bristles or scales outside these. 

 Disk yellow, rays white, pinkish, or purple. 



1. 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 purpHsh. Fields and waste ground. 



2. E. strigosus, Muhl. 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. 



3. E. bellidifolius, MuhL Robin's Plantain. Perennial. Soft- 

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

 erect, 1-2 ft. high ; root-leaves, oboA'ate-obtuse, somewhat serrate ; 

 stem-leaves few^, lance-oblong, acute, clasping ; heads rather large, 

 1-9, on long peduncles, wuth 50-60 long, rather broad, bluish-purple 

 or reddish-purple rays. Thickets and moist banks. 



4. E. philadelphicus, L. Perennial. Rather hairy ; stems slender, 

 about 2 ft. high ; root-leaves spatulate and toothed ; stem-leaves 

 usually entire and strongly clasping, 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. 



in. COREOPSIS, L. 



Annual or perennial herbs. Leaves opposite or the upper 

 alternate, entire or pinnately divided. Heads radiate, solitary 

 or corymbed, many -flowered ; bracts in 2 row^s of about 8 each, 

 the inner membranaceous and appressed, the outer narrower 

 and spreading ; receptacle chaffy. Eay-flowers neutral ; disk- 

 floAvers tubular, perfect. Akenes compressed, oval to oblong, 

 often winged. Pappus of 2 scales or bristles, or wanting. "* 



1. C. tinctoria, Nutt. Garden Coreopsis. Annual. Stem erect, 

 smooth, branched, 2—3 ft. high. Leaves 2-3 times pinnately divided, 

 the divisions linear, lower leaves petioled, the upper often sessile and 

 entire. Heads 1-1 j in. wdde, on slender peduncles ; inner bracts 

 brown with scarious margins, outer bracts very short. Ray-flowers 

 about 8, yellow with a brown base, 3-lobed at the apex. Akenes 

 linear. Pappus minute or none. Common in gardens.* 



2. C. lanceolata, L. Tickseed. Perennial; stem slender, erect 

 or ascending, smooth or slightly downy below, simple, 9-15 in. high. 

 Leaves opposite, the lower spatulate to elliptical, sometimes lobed, 



