Obdbb to.— composite. 429 



9 B. glabSUnm Nutt. Ims. mnoaih, entire, spaMate, hng-tapering at base, upper 

 lanceolate and lance-linear, sessile, acuminate; hds. -t to 6, corymbed; invoL 

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

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

 more. Jl., Aug. 



21. CALLIS'TEPHUS, Ca.ss. China Aster. (Gr. KaXXog, beauty, 

 aTE(po^, a crown ; characteristic of the pappus.) Ray-flowers $ , numer- 

 als; disk-flowers fj ; involucre hemispherical; receptacle subconvex ; 

 pappus double, each in 1 series, outer series short, chafl'y-setaceou^, with 

 the setaj united into a crown ; inner series of loug, filiform, scabrouh, 

 deciduous bristles. — (T) Exotics. Lvs. alternate. 



C. Chinensis Ness. St. hispid ; branches divergent, 1-flowered ; lvs. ovate, 

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

 inally from China^ Stem about 18' high, with long branches, each terminated by 

 a single, large head. Eays dark purple. Disk yellow. July — Sept. — Cultiva- 

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

 double, with white, blue, rod, iiaked and mottled rays, f (Aster Chinensis 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, either (I) and caulescent or 7i and 



acaulescent. Hds. solitary. 



1 B. integrifdlia Mx. Annual, diffusely hranched; lvs. entire, spatulate-oboval^, 

 upper oblong-lanceolate, sessile; scaler lauoe-ovate, setaceous-acuminate, with 

 scarious margins. — Wet prairies, Zy. to Tex. Sts. 6 to 12'. Rays violet-pur- 

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



2 B. perSnnis L. Perennial ; root creeping ; scape naked, singU-flowered ; 

 I'/s. obovate, crenate. — U 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 wliito head which is single, double or quilled in the differ- 

 ent varieties. Blossoms in the spring and summer months. 



23. DAH^LIA, L. (In honor of Andrew I)akl,a. Swedish botanist, 

 pupil of Linnseus.) Heads many-flowered, rays $ , disk ^ ; involucre 

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

 united at base ; receptacle chaflfy ; pappus none. — U Splendid Mexican 

 herbs. Lvs. pinnate, opposite. 



1 D. variabilis Desf. St. green ; rachis oftlie lvs. winged; Z/fe. ovate, acumi- 

 nate, serrate, puberulent or nearly smooth ; outer mvol reflexed ; ray jU. S , sterile 

 or fertile. — ^These superb and fashionable plants are natives of sandy meadows 

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

 mon elder, but the flower.? are large and beautiful, sporting into innumerable 

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

 red, rarely j-ellow, blooming from July until arrested by frost. 



2 D. cocoinea Cav. St. frosty, or hoary, hollow ; lvs. with the rachis naJted; 

 2^. roughish beneath ; outer in vol spreading ; rays neuter. — Stems about if high. 

 Foliage rather glaucous. Rays scarlet, 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 preserved 

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



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

 Great Bj-itain," <fec., I'ZSS.) Hds. many-flowered ; ray-flowers ?, m a 

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

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

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



