Dahlia. LXXV. COMPOSITE. 327 



very small, loosely corymbose ; rays minute.— Dry soil, Western States ! S. to 

 La. Plain of a greyish or bluish" aspect, 3— G' high, but at length spreading 

 1— 21-. Leaves 4— 12" by J— 1". Rays purplish. June— Aug. 



6. E. Canadense. Canadian or Common Flcabane. 



Invol. oblong ; rays numerous, (40—50), crowded, minute ; pappus simple ; 

 St. hairy, paniculate ; Ivs. lanceolate, lower ones subserrate. — A very common an- 

 nual plant of no beauty, growing by roadsides and in fields, throughout N. Am. 

 Stenn ^ — 9f ! high, branching, haiiy and furrowed. Leaves very narrow, with 

 rough edges. Flowers white, very numerous, small, of mean appearance, ir- 

 regularly racemose upon the branches, and constituting a large, oblong panicle. 

 The plant varies greatly in size, according to the soil. Aug. — Nov. 



14. CALLISTfiPHUS. Cass. 

 Gr. KaWoi, beautiful, or£^oj, a crown; characteristic of the pappus. 



Ray-flowers 9 , numerous ; disk-flowers 5 ; involucre hemispheri- 

 cal ; receptacle subconves ; pappus double, each in 1 series, outer 

 series short, chaffy-setaceous, with the setje united into a crown ; in- 

 ner series of long, filiform, scabrous, deciduous setae. — ® Exotics. 

 Lv^ alternate. 



y>CniNENsis. Ness. (Aster Chinensis. Linn.) China Aster. — S/. hispid; 

 branches divergent, 1-fiowered ; Ivs. ovate, coarsely dentate, petiolate, cauline 

 ones sessile, cuneate at base. — Said to be originally from China. Stem about 

 18' high, with long branches, each terminated by a single, large head. Rays 

 dark purple. Disk yellow. JuJy — Sept. — Cultivation has produced many beau- 

 tiful and even splendid varieties, double and semi-double, with white, blue, red, 

 flaked and mottled rays, f \ 



15. BELLIS. 



Lat. belltis, pretty; a term quite appropriate to the genus. 



Heads many-flowered ; rays $ ; disk 5 ; involucre hemispherical, 

 of equal scales ; receptacle subalveolate, conical ; pappus U. — Low 

 herbs, eitJier ® and caulescent or % a?id acaulescent. Hds. solitary. 



B. PERENNis. Garden Daisy. — i?^^/. creeping ; scape naked, single-flowered; 

 Ivs. obovate, crenate. — % Native of England and other parts of Europe, nearly 

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

 high, with a single white flower which is single, double or quilled in the differ- 

 ent varieties. Blossoms in the spring and smnmer months. 



IG. DAHLIA. 



Ill honor of Andrew Dahl, a Swedish botanist, pupil of Linnaaus. 



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

 of 8 scales united at base ; receptacle chaffy ; pappus 0. — % Splendid 

 Mexican herbs. Lvs. pirmate, opposite. 



1. D. VARIABILIS. Desf. (D. superflua. Ait.)— St. green; rachis of the tvs. 

 ■winged; Ifts. ovate, acuminate, serrate, puberulent or nearly smooth; outer , 

 invot. leflexed; rmj fis. 9, sterile or fertile. — These superb and fashionable 

 plants are natives of sandy meadows in Mexico. They have coarse andrough- 

 ish leaves, resembling those of the common elder, but the flowers are large and 

 beautiful, sporting into innumerable varieties, single and double, of every con- 

 ceivable shade of scarlet, crimson, purple, red, rarely yellow, blooining from 

 July until arrested by frost. 



2. D. cocciNEA. Cav. (D. frustranea. Ait.) — St. frosty, or hoary, hollow; 

 Ivs. with the rachis naked; Ifts. roughish beneath; o^dcr invol, spreading; rays 

 neater. -Stems about if high. Foliage rather glaucous, '^ays scarlet, saffron- 

 color or yellow, never purple or white. — The Dahlias are generally cultivated 

 by the divisions of the tuberous roots, which, as soon, fis the frost blackens the 

 tops, are to be taken up and preserved through tha winter in a dry place, free 

 from frost. 



OR* 



