Obdbb 10.— composite. 429 



9 E. glabSlIum Nutt. JJvs. smooth, entire, spaiidaie, long-iapering at base, upper 

 lanceolate and lanoe-linear, sessile, acuminate ; hds. 4 to 6, corymbed ; invol. 

 hemispherical, pubescent as well as the peduncles ; rays very numerous, pale 

 blue. — ^Wis. to Nebr. 12 to 18' high. Lvs. long and narrow. Rays 100 or 

 more. Jl., Aug. 



21. CALLIS'TEPHUS, Cass. China Aster. (Gr. KdXkog, beauty, 

 aTe(j)og, a crown ; characteristic of the pappus.) Ray-flowers $ , numer- 

 ous ; disk-flowers ^ ; involucre hemispherical ; receptacle subconvex ; 

 pappus double, each in 1 series, outer series short, chaflfy-setaceous, with 

 the setsB united into a crown ; inner series of long, filiform, scabrous, 

 deciduous bristles. — (D Exotics. Lvs. alternate. 



C. Chin^nsis NesS. St. hispid-; branches divergent, l-flowered ; lvs. ovate, 

 coarsely dentate, petiolate, cauline ones sessile, cuneate at base. — Said to be orlg- 

 inaUy from China. Stem about 18' high, with long branches, each terminated by 

 a smgle, large head. Rays darlc purple. Disk yellow. July — Sept. — Cultiva- 

 tion has produced many beautiful and even splendid varieties, double and semi- 

 double, with white, blue, red, flailed and mottled rays, f (Aster Cbineusis L;) 



22. BEL'LIS, L. Garden Daisy. (Lat. bellus, pretty ; a term 

 quite appropriate to the genus.) Heads many-flowered ; rays $ ; disk 



?J ; involucre hemispherical, of equal scales ; receptacle subalveolate, 



conical ; pappus none. — Low herbs, cither (I) and caulescent or 2f and 



acaulescent. Hds. solitary. 



1 B. integrifolia Mx. Annual, diffusely tranched; lvs. entire, spatulate-obovate, 

 upper oblong-lanceolate, sessile; scales lauce-ovate, setaceous-acuminate, with 

 scarious margins.— "Wot prairies, Ky. to Tex. Sts. 6 to 12'. Rays violet-pur- 

 ple, in hds. similar to the next. Mar. — May. 



2 B. perennis L. Perennial; root creeping; scape naked, single-flowered; 

 lvs. obovate, crenate. — If Native of England and other parts of Europe, nearly 

 naturalized in some parts of N. England in cultivated grounds. Scape 3 or 4' 

 high, with a single white head whieli is single, double or quiUed in the differ- 

 ent varieties. Blossoms in the spring and summer months. 



23. DAH^LIA, L. (In honor of Andrew Dahl, a Swedish botanist, 

 pupil of Linnaeus.) Heads many-flowered, rays S , disk g : involucre 

 double, the outer series of many distinct scales, the inner of 8 scales 

 united at base ; receptacle chaffy ; pappus none. — 1i Splendid Mexican 

 herbs. Lvs. pinnate, opposite. 



1 D. variabilis Desf. St. green ; rachis of the lvs. winged; Ifts. ovate, acumi- 

 nate, serrate, puberulent or nearly smooth ; outer invol. reflexed ; ray fls. 9 , sterile 

 or fertile. — These superb and fashionable plant's are natives of sandy meadows 

 in Mexico. They have coarse and roughish lvs. resembling those of (he com- 

 mon elder, but the flowers are large and beautiful, sporting into innumerable 

 varieties, single and double, of every conceivable shade of scarlet, crimson, purple, 

 red, rarely yellow, blooming from July until arrested by frost. 



2 D. ooooinea Oav. St. frosty, or hoary, hollow ; lvs. with ihe rachis naked; 

 //fa. roughish beneath; outer invol. spreading ; rays neuter. —Stems about 4f high. 

 Foliage rather glaucous. Rays scariet, saffron-color or yellow, never purple or 

 white.— The Dahlias are generally cultivated by the divisions of the tuberous roots, 

 which, as soon as the frost blackens the tops, are to be taken up and prt served 

 •through the winter in a dry place, free from frost. 



24. BOLTO'NIA, L'Her. (To J. B. Bolton, author of "Ferns of 

 Great Britain," &c., 1Y88.") Hds. many-flowered; ray-flowers S, ma 

 single series, those of the disk tubular, >i ; scales in 2 series, appressed, 

 with luombranous margins ; receptacle conic, punctate ; achenia flat, 2 

 or 3-winged ; pappus of minute setae, 2 (to 4) of them usually length- 



