756 



CHRYSANTHEMUM 



CHRYSANTHEMUM 



10. Parthenium, Pers. (Pyrethrum Parthenium, 

 Smith. Parthenium Matricdria, Gueld.). FEVERFEW. 

 Fig. 930. Glabrous strong-scented perennial, 1-3 ft., 

 much branched in the taller forms : Ivs. ovate or oblong- 

 ovate in outline, pinnatisect or bi-pinnatisect, smooth 

 or lightly pubescent; segms. oblong or elliptic-oblong, 

 pinnatifid or cut, the uppermost more or less confluent. : 

 fl.-heads small, many, stalked, corymbose; disk yellow; 

 rays white, oblong, equaling or exceeding the disk. 

 Eu. to the Caucasus. Some authors regard this as one 

 widely variable species; others make at least two spe- 

 cies, one of them (C. prsealtum, Vent.) being the Cau- 

 casian form, distinguished by more deeply cut Ivs., 

 longer-peduncled heads, and rays longer than the disk 

 rather than equaling it (as in C. Parthenium type). 

 There are double-fld. and also discoid forms. Var. 

 a&reum, Hort. (P. aureum, Hort.), is the GOLDEN 



930. Chrysanthemum 



Parthenium. Feverfew. 



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FEATHER commonly used for carpet-bedding. It has 

 yellow foliage, which becomes green later in the season, 

 especially if fls. are allowed to form. It is used for 

 edgings and cover. Var. afcreum crispum, Hort., is 

 dwarf, compact, with foliage curled like parsley. Var. 

 selaginoides, and var. laciniatum, Hort., are distinct 

 horticultural forms. Var. glaftcum, Hort., has dusty 

 white foliage, and does not bloom until the second year. 

 Intro, by Damman & Co., 1895. All these varieties are 

 prop, by seeds. The feverfew is common about old 

 yards, and is much employed in home gardens as 

 edging. In its undeveloped and prevailing forms, it is 

 one of the "old-fashioned" plants. 



DD. Heads borne singly on the branches or sts. (or at 

 least not definitely clustered). 



E. Height less than 1 ft. 



11. TchiMtchewii, Hort. (C. Tchihdtcheffii, Hort.). 

 TURFING DAISY. Densely tufted perennial for carpet- 



ing dry, waste places; height 2-9 in. : sts. very numerous, 

 rooting at the base: foliage handsome dark green, 

 finely cut, the segms. linear, persisting into winter: 

 fl.-heads solitary on axillary peduncles, borne profusely 

 for several weeks; rays white, disk yellow. Asia 

 Minor. R.H. 1869, p. 380, desc., and 1897, p. 470. Gn. 

 26, p. 443. Prop, by division of roots or simply by 

 cutting the rooted sts., but chiefly by seeds. Highly 

 recommended abroad for spring and early summer 

 bloom in edgings and low formal plantings. Said to 

 thrive in dry places and under trees. 



EE. Height more than 1 ft. 



F. Group of greenhouse plants (at the N.), shrubby at the 

 base: sts branched at the top: rays white or lemon. 



G. Foliage not glaucous. 



12. frutescens, Linn. MARGUERITE. PARIS DAISY. 

 Figs. 931, 932. Usually glabrous, 3 ft. high, peren- 

 nial: Ivs. fleshy, green: heads numerous, always 

 single; rays typically white, with a lemon-colored 

 (never pure yellow or golden) form. Canaries. 

 G.C. II. 13:561; III. 35:216. Gn. 12, 

 p. 255; 17, p. 5; 26, p. 445; 70, p. 310. 

 Intro, into England. 1699. This is the 

 popular florists' Marguerite, which can 



931. Chrysanthemum frutescens. 



The Marguerite or Paris daisy. 



(XJfl 



be had in flower the year round, but is especially grown 

 for winter bloom. Var. grandifldrum, Hort., is the 

 large-fld. prevailing form. The lemon-colored form 

 seems to have originated about 1880. Under this 

 name an entirely distinct species has also been pass- 

 ing, yet it has never been advertised separately in the 

 American trade. See No. 13. 



GG. Foliage glaucous. 



13. anethifdlium, Brouss. (C. foeniculaceum, Steud. 

 P. fceniculdceum var. bipinnatifidum, DC.). GLAU- 

 COUS MARGUERITE. Fig. 932. Perennial: rarer in cult, 

 than C. frutescens (which see), but distinguished by its 

 glaucous hue, and by the way in which the Ivs. are cut. 

 The segms. are narrower, more deeply cut, and more 

 distant than in No. 12. The Ivs. are shorter petioled. 

 Canaries. This species is doubtless cult, in American 

 greenhouses as C. frutescens. A lemon-fld. form is 

 shown in R.H. 1845:61 but called C. frutescens. 



