818 LXXVIII. COMPOSITE. (J. D. Hooker.) [ Tanacetum. 
men but Wallich’s. Kurz is the authority for the Siam habitat. Bentham had not 
seen if, or would never have confounded it with Centipeda orbicularis (C. minuta, 
Benth., Myriogyne minuta, Less.), even generically. It is, however, generically allied 
to that plant and to Dichrocephala, near whieh I think that both should be placed. 
71. TANACETUM, Linn. 
Annual or perennial herbs. Leaves usually pinnatisect. Heads corymbose 
(rarely large, long-peduncled, and solitary), heterogamous or homogamous, 
disciform, yellow ; outer fl. O or 9 , 1-seriate, fertile, terete or compressed, 2-3- 
fid; disk-fl. 3, fertile, tube stout cylindric, limb 5-fid. ` Znvolucre usually broad 
and short; bracts oo -seriate, appressed, margins often scarious and brown, outer 
smaller. Receptacle flat or convex, naked. Anther-bases obtuse, entire. Style- 
arms of Y with truncate penicillate tips. Achenes compressed, 5-angled or -ribbed, 
or of the ray triquetrous, truncate; pappus annular or coroniform or 0, rarely a 
dimidiate auricle.—Disrrrs. Species about 30, north temperate regions. 
* Leaves all cauline and pinnatisect, stems or branches all flowering. 
1, T. fruticulosum, Lede). FI. Alt. iv. 58; Ic. t. 38; hoary or woolly, 
stems very many from the woody root 10-14 in. strict erect leafy upwards, leaves 
4-3 in. 1-2-pinnatisect, segments spreading linear obtuse, heads many peduncled 
or sessile 1 in. diam., invol. bracts broadly oblong nearly glabrous all scarious and 
pale or margins faintly coloured, receptacle conic. DC. Prodr. vi. 199. Py- 
rethrum Athanasia, Jess, ; Boiss. Fl. Orient. iii. 353. 
Western TisET, alt. 12-15,000 ft., Thomson, &c.—DisTmrB. Altai Mts., Aff- 
ghanistan. 
Root as thick as the thumb and less; stems rather slender. Heads numerous. 
Achenes, ripe not seen.-—The species is easily confounded with Artemisia fasciculata ; it 
differs from T. artemisioides in the narrower leaf-segments and glabrous involucre, 
from A. gracile in habit and the much larger heads. 
2. T. artemisioides, Schultz-Bip. in Herb. Hook. ; hoary-pubescent, 
stem 1-2 ft. slender naked below sparsely leafy ribbed simple or corymbosely 
branched above, leaves j-1 in. subpalmately 1-2-pinnatisect, segments short 
broad obtuse, heads + in. in small corymbs terminating very long slender 
branches, invol. bracts broadly oblong concave coriaceous pubescent wholly pale, 
receptacle conical. Artemisia fasciculata, Herd. Ind. Or. H. f$ T.; Clarke 
Comp. Ind. 162, not of M. Bieb. 
Western Trset; Balti, alt. 8-9000 ft., Thomson. 
Stems sometimes simple, at others copiously branched from the base; the branches 
all long, slender, and sparsely leafy, both angled and ribbed, greenish grey. Heads 
sessile in a cluster, or peduncled and forming a small flat-topped or rounded corymb 
rarely 1 in. diam.; flowers about 20; receptacle conic. Achenes, ripe not seen. 
3. T. gracile, Hook. f. § Thoms.; hoary-pubescent, stems many from a 
woody stock very slender 1-2 ft. corymbosely branched above, branches slender 
spreading, leaves j-l in. few scattered palmately 2-pinnatisect, segments very 
dde. heads 4 in. diam. in small corymbs terminating the long slender branches, 
invol. bracts broadly oblong scarious glabrous pale, receptacle conical, achenes 
obovoid with a terminal cupula. T. fruticulosum, Clarke Comp. Ind. 153. 
Western TinET, Falconer ; Ladak, alt. 11-12,000 ft., Thomson; Sutlej river, N. of 
Kumaon, alt. 13,500 ft., Strach. & Winterb. 
This is very near T. artemisioides, but is much more slender, with slender leaf- 
segments and much smaller heads, with glabrous neo, bracts. 
4. T. nubigenum, Wall. in DC. Prodr. vi. 130; hoary or woolly, stems 
