198 COMPOSITE FAMILY. 



37. EBf GERON, FLEABANE. (Name of Greek words, for spring and 

 old man, suggested probably by the hoary a])pearaiice of some yernal species.) 

 Erigeron spiiciosujf of Oregon is occasionally cultivated, as a garden 



perennial, is more showy than any of the following, which are the common 

 wild species of the country. 



§ 1. Rays conspicuous : heads more or less conjmbed : stem erect. 

 » Rays purple or purplish, very numerous (50- 150) ; pappus simple, y. 

 E. Philad61phicum, Common F. Low grounds : 2° high, rather hairy, 

 with oblong mostly entire and partly clasping stem-leaves, spatulate and toothed 

 root leaves, and several heads ; the rays very many and narrow, pale reddish- 

 purple : fl. summer. 



ii. bellidifdlium, Daisy-leaved F. o.r Robin's Plantain. Moist 

 ground, soft-hairy, 1° - 2° high, with a cluster of rather large roundish root- 

 leaves lying flat on the grbund, the stem-leaves rather few and small ; heads 

 1-9 and long peduncled, rather large, with about 50 lineal- light bluish-purple 

 rays : fl. late spring. • ' 



» » Rays white, only about 30, ratlier broad : pappus simple. JH 



E. v6rnum. Low grounds from Virginia S. ; smooth, with oval or spatu- 

 late leaves all at the root, slender scape 1° - 2° high, with a few small heads : 

 fl. spring. y 



# « » Rays white or nearly so, 50 or more, narrow : pappus double, the outer of a 

 row o/ minute chaffy bristles' or little scales. ® ® 



E. strigdsum. Smaller Daisy-Fleabanb. Fields : 2° - 4° high, 

 smoothish, or roughish with minute close-pressed hairs ; leaves entire, the 

 lower spatulate and slender-petioled, the upper lanceolate j rays pretty long : 

 fl. all summer. 



E. ^nnuum. Larger Daisy-Fleabane. Fields and waste places ; a 

 common weed, 3° - 5° high, branched above, roughish with spreading hairs ; 

 leaves ovate or lance-ovate, the lower ones cOarsely toothed ; rays rather short, 

 often tinged with purple : fl. all summer. 



§ 2. Rays inconspicuous, scarcely longer than, the cylindrical hell-shaped involucre 

 and the simple pappus, numerous, in more ilian one row. 



E. Canad^nse, Horseweed or Bctter'weed. a common weed in waste 

 or cult, ground, bristly hairy ; with erect strict stem 1° - 5° high, linear leaves, 

 only the lowest ones cut-lobed, and very small panicled heads of whitish flowers, 

 all summer. ® 



38. BOLTOlflA. (ifamed for J. Bolton, an English botanist.) Wild 

 plants of low grounds S. & W., resembling Asters except in the akenes and 

 pappus : ray -flowers blue-purple or nearly white ; disk-flowers yellow ; in 

 autuQin. 2^ 



B. difftisa, of Illinois & S., has small heads loosely panicled on the slender 

 open branches, which bear small awl-shaped leaves, those of the stem lance- 

 linear ; pappus of several bristles and 2 short awns. 



B. glastifblia, from Penn. S. & W., has fewer larger and corymbcd heads, 

 lanceolate partly, erect leaves, broadly winged akenes; and 2 or 3 short awns in 

 the pappus. 



B. asteroides, from Penn. S., less common, is very like the last, but 

 with narrow margins to the akenes and no awns (only a few short bristles) in 

 the pappus. 



39. BB.ACHTCOME. (Name in Greek means short tuft, from the pap- 

 pus, m which respect mainly it differs frOra the Daisy-genus.") 



B. iberidifdlia, cult, for ornament, from Aiistraliai has slender brandiino 

 stems nearly 1° high, pinnately parted leaves with very slender divisions, and 

 luindsome heads with violet-blue ray-flowers and similar or darker purule 

 csntro, produced all summer. ® ^ 



