240 COMPOSITE FAMILY. 



lower and larger somewhat serrate ; scales linear, green at the tip and 

 down the back ; rays small, white or violet. Common. 



A. paniculatus, Lam. Often taller, generally more strict, profusely 

 paniculate-branched ; leaves thin, oblong or narrow-linear, the lower 

 sharply serrate, upper entire ; heads larger, in loose and leafy panicles; 

 scales narrow-linear with green tips and the outer ones green the whole 

 length ; flowers violet or nearly white. Common. 



A. salicif dims, Ait. Leaves shorter and firmer than in the last, often 

 scabrous, mostly entire ; scales more imbricated, firmer, linear, with 

 acutish green tips ; heads (rarely white) tending to be racemosely clus- 



() () Scales nearly equal. 



A. jtinceus, Ait. Slender and nearly simple, l°-3° ; leaves long- 

 linear (3'-5'), all (or all but the lower most) entire ; heads comparatively 

 few, light-purple, the outer scales a little shorter than the inner. Bogs, N. 



A. longifdlius, Lam. More branched ; leaves broader, entire or 

 sparsely serrulate ; heads larger, the scales about equal and little imbri- 

 cated ; rays violet to almost white. Far N. 



17. ERIOERON, FLEABANE. (Greek words for spring and old man, 

 suggested probably by the hoary appearance of some vernal species.) 

 (p. 225.) 



* Bays conspicuous; heads more or less corymbed; stem erect. 



i- Bays purple or purplish, very numerous (50-150) / pappus simple. % 



E. Philad^lphicus, Linn. Rather hairy, 2° high ; stem leaves oblong, 

 mostly entire, and partly clasping ; spatulate and toothed root leaves, and 

 several heads ; rays very many and narrow, pale reddish-purple ; flowers 

 summer. Common. 



E. bellidifblius, Muhl. Robin's Plantain. Soft-hairy, l°-2° high, 

 with a cluster of rather large roundish root leaves lying flat on the 

 ground ; stem leaves rather few and small ; heads 1-9 and long-pedun- 

 cled, rather large, with about 50 linear, light bluish-purple rays ; flowers 

 late spring. Common. 



1- -i- Bays white, only about 30, rather broad ; pappus simple. 2/ 



E. nudicaulis, Michx. Smooth, with oval or spatulate leaves all at 

 the root ; slender scape l°-2° high, with a few small heads ; flowers 

 spring. Low grounds, Va., S. i* 



■*- h- +- Bays white or nearly so, 50 or more, narrow; pappus double, the 

 outer of a row of minute chaffy bristles or little scales. (g (§) 



E. atrigdsus, Muhl. 2°-4° high, smoothish, or roughish, with minute 

 close-pressed hairs ; leaves entire, the lower spatulate and slender-petioled, 

 the upper lanceolate ; rays rather long ; flowers all summer. Fields. 



E. Animus, Pers. 3°-5° high, branched above, roughish, with spread- 

 ing hairs ; leaves ovate or lance-ovate, the lower ones coarsely toothed ; 

 rays rather short, often tinged with purple ; flowers all summer. Fields 

 and waste places. 



* * Bays inconspicuous, scarcely longer than the cylindrical, bell-shaped, 

 involucre and the simple pappus, numerous, in more than one row. 



E. Canadensis, Linn. Hoksewbed, Butterweed, Mare's-tail. A 

 common weed, with strong odor, in waste or cult, ground ; bristly hairy ; 

 stem erect, strict, l°-5° high ; leaves linear, only the lowest ones cut- 

 lobed ; heads of whitish flowers very small, panicled ; all summer. ® 



