458 ORDER 70. COMPOSITE. 



chaffy ; achonia without a pappus. 2 European herbs with much di- 

 vided, alternate Ivs. Hds. radiate. 



1 A. Millefolium L. Lvs. bipinnatifid, with linear, dentato, mucronato seg- 

 ments / st. furrowed, corymbed at top ; scales oblong ; rays 4 to 5, short. Fields, 

 pastures, &c., N. Eng. to Or. and Arctic America. St. a foot high branching at 

 top into a dense, flat-topped corymb of white or rose-colored fls. It has an agree- 

 able, pungent taste and smell. Jn. Sept. The variety with rose-purple flowers 

 is very pretty in gardens. 



2 A. ptarmica L. SNEEZEWORT. Lvs. linear, acuminate, equally and sharply ser- 

 rate, smooth. Found in moist grounds and shady places, Can. and N. Y. (Pursh), 

 Mass. (Nichols). Plant about 15' high, branching at top into a diffuse corymb of 

 white fls. The Ivs. arc remarkably distinct from the jiarrow. 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 Eur. 



72. LEUCANTHEMUM, Tourn. WHITE-WEED. (Gr. Xeviio?, white, 

 dvdog, flower ; the heads have large, conspicuous rays.) Involucre 

 broad, depressed, imbricated ; rays pistillate, numerous ; receptacle flat, 

 naked ; achenia striate ; pappus none. Herbs with alternate Ivs. lids. 

 radiate. 



L. vulgare Lam. St. erect, simple or few-branched, with solitary heads; Ivs. 

 clasping, lanceolate and oblong, toothed above, cut-pinnatifid at the base; 

 scales edged with brown. U A great annoyance to the farmer, in fields and 

 pastures, U. S. to Arc. Am. St. about 2f. high. Lvs. comparatively few and 

 small. Heads large (13 16'' broad). Rays many, ligulate, white. Jl. Sept. 

 Eur. (Chrysanthemum Leucanthemum, L.) 



J3. TUBULIFLORUM (Tenney). Rays tubular, elongated, white, deeplv cleft 

 into 5 or 3 lobes. Poughkeepsie, N. Y. (Mr. W. R. Gerard.) 



73. MATRICA^RIA, Tourn. FEVER FEW. Involucre scales imbricate, 

 many-flowered, with membranous margins ; receptacle conical or con- 

 vex, naked; pappus a membranous margin crowning the achenia, or 

 none. Herbs chiefly perennial, with alternate Ivs. lids, with or with- 

 out rays. (Pyrethrnm, Smith.) 



M. parthenium L. Hds. radiate; Ivs. petiolate, flat, tripinnate, tho segm. ovate, 

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

 Fields, rare. Several varieties of the Fever-few are cultivated, and arc 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, f Eur. 



2 M. discoidea DC. Hds. discoid; Ivs. sessile, 2 to 3-pinnately parted, lobes 

 small, linear-oblong, acute; hds. on simple peduncles; scales equal, ova), obtuse, 

 with white, scarious margins much shorter than the conical disk. Q) 111. opposite 

 St. Louis, also in Oregon. Sts. 3 to 8' high. Disk 2 to 3" broad and high. Pap- 

 pus obsolete. 



3 M. Balsamita "Willd. ENGLISH MINT. Pubescent; hds. discoid; st. erect; 

 Ivs. ovate, oblong, serrate, the lower petiolate, upper sessile, auriculate at base ; 

 hds. corymbed; pappus none. Gardens. St. 1 to 2f high. The plant is yellow- 

 ish green, clothed with loose, minute tomentum, with the fragrance of spearmint. 



74. CHRYSANTHEMUM, (Gr. xpvoog, gold, av6o<;, flower.) Heads 

 heterogarnous ; involucre imbricate, hemispherical ; the scales with 

 membranous margins ; receptacle naked ; pappus none. Ornamental 

 plants from China and other eastern countries. Lvs. alternate, lobed. 

 Hds. radiate. 



1 C. coronarium L. Annual; st. branched; Ivs. 'bipinnatifid broader at the 



summit, acute. Native of S. Europe and N. Africa. The variety with double 



