LII. COMPOSITE 
265 
receptacle conical, covered with small, lanceolate, 3-toothed 
scales ; pappus of about 15 spathulate, fringed scales ; ligules 
few, white, very short, notched ; disk-flowers yellow ; corolla 
5-toothed. Achenes angled, roughly pubescent, crowned with 
the pappus scales. 
Simla, common near houses ; January-December. — Himalaya, 4000-8000 ft. ; 
introduced from America. 
Naturalised in a few localities in England. 
33. ACHILLEA. From Achilleos, the classical name of 
A. Millefolium ; in honour of the mythical hero Achilles. — 
N. temperate regions. 
Achillea Millefolium, Linn. ; FI. Br. Ind. iii. 312. An erect, 
pubescent herb ; stems 6-24 in., leafy, grooved. Leaves alternate, 
oblong-lanceolate, 2-4xJ-§ in., 3-pinnatisect ; segments linear, 
acute ; radical leaves stalked, upper sessile. Heads radiate, J in. 
diam., crowded in compound corymbs. Involucral bracts few, 
erect, outer ones shorter ; receptacle flat, covered with thin, 
oblong scales nearly as long as the flowers ; flowers white or 
pale pink ; pappus none ; ligules rounded, reflexed ; corolla of 
disk-flowers 5-lobed. Achenes oblong, flattened, shining. 
Mahasu, Huttoo ; August-October. — W. Himalaya, 6000-9000 ft. — N. Asia, 
N. America, Europe (Britain, Milfoil). 
34. TANACETUM. Origin of name doubtful ; said to be 
altered from the Greek athanasia, immortality, referring to the 
persistent flowers. — N. temperate regions. 
Strong-scented, erect herbs. Leaves alternate, pinnatisect ; 
segments linear. Heads discoid, numerous, in terminal corymbs. 
Involucral bracts many, erect, margins coloured, outermost 
linear ; receptacle convex, naked ; flowers yellow ; pappus none ; 
corolla 5-toothed. Achenes smooth, 5-ribbed. 
Leaves f— f in. Involucral bracts woolly. Flowers orange- 
yellow . . . . . . . . 1. T. nubigenum. 
Leaves (radical) 6-18 in. Involucral bracts hairy. Flowers 
bright yellow . . . . . . . . 2. T. longifolium . 
1. Tanacetum nubigenum, Wall. ; FI. Br. Ind. iii. 318. 
Hoary ; stems tufted, 12 in., densely leafy in the upper part. 
Leaves J-J in., sessile. Heads nearly J in. diam., orange-yellow. 
Involucral bracts woolly. 
Shali ; September, October. — Simla to Sikkim, 9000-12,000 ft. 
2. Tanacetum longifolium, Wall. ; FI. Br. Ind. iii. 320. 
Hairy ; stems 6-18 in., leafy and densely hairy towards the top. 
Leaves 6-18 in., mostly radical, far overtopping the flowers. 
