6. Indicum, Linn

Fig. 929. Much like the last, but leaves thin and flaccid, pinnately parted, with acute or mucronate teeth: outer involucral bracts broad and scarious except the herbaceous midnerve; rays yellow, shorter than diam. of the disk. China and Japan. B.M. 7874. G.C. III. 8:565; 28:342; 31:303 (adapted in Fig. 929). - This species is not native to India, and therefore Linnaeus' name is inappropriate. Abroad, C. indicum is often used in a wide sense, to include C. morifolium. In recent years, both C. morif olium and

C. indicum have been grown in England from wild stock, and from such studies of them the present descriptions and figures are drawn. From these plants it is supposed, by endless variation and by hybridization, the highly developed glasshouse or florist's chrysanthemums have come, a group that may be distinguished.as C. hortdrum, Figs. 938-50.

Wild form of Chrysanthemum morifolium, as grown in England.

Fig. 928. Wild form of Chrysanthemum morifolium, as grown in England.

Wild form of Chrysanthemum indicum, as grown in England.

Fig. 929. Wild form of Chrysanthemum indicum, as grown in England.

7. Ornatum, Hemsl

(C. marginatum, Hort.). Allied to the above two species, and perhaps a form of C. morifolium: bushy plant, 3-4 ft.: leaves palmately lobed, ovate in outline, white-tomentose beneath and on the margin, 1 1/2-2 in. long: flower-heads loosely corymbose, 2 in. or less across, the disk yellow and rays white and broad; bracts of involucre in about 3 series, all similar, white in center, purple-brown on margin: achenes small, oblique, glabrous. B.M. 7965. G.C. III. 35:51. Gn. 71, p. 53; 73, p. 90. - A recent introduction; grows well in the open in England, but does not bloom unless taken indoors.

bb. The garden pyrethrums and others; heads usually not highly doubled and modified.

c. Leaves cut to the midrib or nearly so.

D. Heads borne in corymbs, i.e., flat-topped, dense clusters.

e. Rays yellow.

8. Achilleaefolium, Dc

(Achillea aurea, Lam.). Perennial, 2 ft.: stem usually unbranched, except along the creeping and rooting base: stems and leaves covered with fine soft grayish white hairs, oblong in outline, about 1 in. long, 1/4in. wide, finely cut: rays 7-8, short, a little longer than the involucre. Siberia, Caucasus. - Rare in cultivation Less popular than the achilleas, with larger flower-clusters.

ee. Rays white.

9. Corymbosum, Linn

(Pyrethrum corymbosum, Willd.). Robust perennial, 1-4 ft.: stem branched at the apex: leaves sometimes 6 in. long, 3 in. wide, widest at middle and tapering both ways, cut to the very midrib, the segments alternating along the midrib. Eu., N. Africa, Caucasus. G.C. II. 20:201. - Rare in cultivation segments may be coarsely or finely cut, and leaves glabrous or villous beneath.

10. Parthenium, Pers

(Pyrethrum Parthenium, Smith. Parthenium Matricaria, Gueld.). Feverfew. Fig. 930. Glabrous strong-scented perennial, 1-3 ft., much branched in the taller forms: leaves ovate or oblong-ovate in outline, pinnatisect or bi-pinnatisect, smooth or lightly pubescent; segments oblong or elliptic-oblong, pinnatifid or cut, the uppermost more or less confluent.: flower-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 species, one of them (C. praealtum, Vent.) being the Caucasian form, distinguished by more deeply cut leaves, longer-peduncled heads, and rays longer than the disk rather than equaling it (as in C. Parthenium type). - There are double-fid. and also discoid forms. variety aureum, Hort. (P. aureum, Hort.), is the Golden

Feather commonly used for carpet-bedding. It has yellow foliage, which becomes green later in the season, especially if flowers are allowed to form. It is used for edgings and cover. variety aureum crispum, Hort., is dwarf, compact, with foliage curled like parsley. variety selaginoides, and variety laciniatum, Hort., are distinct horticultural forms. variety glaucum, 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.

Chrysanthemum Parthenium. Feverfew.

Fig. 930. Chrysanthemum Parthenium. Feverfew.

dd. Heads borne singly on the branches or stems (or at least not definitely clustered).

e. Height less than 1 ft.

11. Tchihatchewii, Hort

(C. Tchihatcheffii, Hort.). Turfing Daisy. Densely tufted perennial for carpeting dry, waste places; height 2-9 in.: stems very numerous, rooting at the base: foliage handsome dark green, finely cut, the segments linear, persisting into winter: flower-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 stems, 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.