CHRYSANTHEMUM. LXXV. COMPOSITES. 343 



numerous divisions and subdivisions. Stem a foot high, branching at top into 

 a dense, flat-topped corymb of white or rose-colored flowers. It has an agreea- 

 ble, pungent taste and smell. June Sept. 



2. A. PTARMICA. Sneezewort. 



Lvs. linear, acuminate, equally and sharply serrate, smooth. Found in 

 moist grounds and shady places, Can. and N. Y. Pursh. Mass. Nichotts. Plant 

 about 15' high, branching at top into a diffuse corymb of white flowers. The 

 leaves are remarkably distinct from the yarrow. The dried powder of the leaves 

 used as snuff provokes sneezing. A variety with double flowers occurs, which 

 is quite ornamental in pots. Aug. f 



40. LEUCANTHfiMUM. 



Gr. \EVKOS, white, avSos, flower ; the heads have large, white, conspicuous rays. 



Involucre broad, depressed, imbricated ; rays pistillate, numerous ; 

 receptacle flat, naked ; achenia striate ; pappus 0. Herbs, with alter- 

 nate leaves. 



L. VULGARE. Lam. (Chrysanthemum Leucanthemum. Linn.') White- 

 iceed. Ox-eye Daisy. Lvs. amplexicaul, lanceolate, serrate, cut-pinnatifid 

 at base ; st. erect, branching. 7J. The common white- weed is an annoyance to 

 farmers, rapidly overspreading pastures and neglected fields, U. S. to Arc. Am. 

 Stems 2f high, simple or with one or two long branches, furrowed. Leaves 

 comparatively few and small, obtuse, the lower ones petiolate, with deep and 

 irregular teeth ; upper ones small, subulate, those of the middle sessile, clasp- 

 ing, deeply cut at base, with remote teeth above. Heads large, terminal, soli- 

 tary. Disk yellow. Rays numerous, white. July. Sept. 



41. PYRETHRUM. 



An ancient name of a certain plant, supposed to be of Anthemis. 



Involucre hemispherical, imbricate ; scales with membranous mar- 

 gins ; receptacle naked ; pappus a membranous margin crowning the 

 achenia. European herbs, chiefly perennial, with alternate leaves. 



P. PARTHENITJM. Feverfew. Lvs. petiolate, flat, tripinnate, the segments ovate, 

 cut ; ped. branching, corymbose ; st. erect ; invol. hemispherical, pubescent. 

 Several varieties of the Feverfew are cultivated, and are in great favor with 

 many florists, on account of their fine pyramidal form, surmounted with a 

 corymb of pure white, double flowers, which retain their beauty for several 

 weeks. 



42. CHRYSANTHEMUM. 



Gr. KpvffoSj gold, avSos ; many species bearing golden colored flowers. 



Involucre imbricate, hemispherical, the scales with membranous 

 margins; receptacle naked ; pappus 0. Ornamental plants from China 

 and other eastern countries. Lvs. alternate, lobed. 



1. C. CORONARIUM. St. branched; Ivs. bipinnatifid, broader at the summit, 

 acute. Native of S. Europe and N. Africa. The variety with double flow- 

 ers is frequently cultivated as a hardy annual. Stem about 3f high, striate, 

 smooth, erect, with alternate, clasping leaves. Flowers large, terminal, soli- 

 tary. Aug. 



2. C. CARINATCM. Willd. (C. tricolor. Andr.} Three-colored Chrysanthemum. 

 Lvs. bipinnate, fleshy, smooth ; invol. scales carinate. Native of Barbary. 



Heads large and beautiful ; disk purple, rays white with a yellow base. A va- 

 riety has flowers entirely yellow. Jl. Oct. 



3. C. SINENSE. Sabine. (Pyrethrum Sinense. DC.} Chinese Chrysanthemum. 

 Lvs. coriaceous, stalked, sinuate-pinnatifid, dentate, glaucous ; rays very 



long. A native of China, where it has been long cultivated and highly esteemed 

 for its beauty. A great number of varieties have been produced, with double, 

 semidouble and quilled flowers of every possible shade of color. It is of very 

 easy culture in any common soil. The plants are propagated by divisions, by 



