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. salicif61ius, 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- 

 tered. Common. 



() () scales nearly equal. 



A. junceus, 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. ERIGERON, 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. 

 +- Kays purple or purplish, very numerous (50-150); pappus simple. 2/ 



B. Philadelphicus. 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. bellidifdlius, 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. 



<- H- Hays white, only about 30, rather broad ; pappus simple. 11 



E. nudicadlis, 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. 



--(-)- Hays ichite or nearly so, 50 or more, narrow ; pappus double, the 

 outer of a row of minute chaffy bristles or little scales. (2) 



E. strigdsus, 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. annuus, Pers. 3-5 c 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. 



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

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



E. Canad^nsis, Linn. HORSEWEED, 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 j all summer. 



