Composite. 
219 
320. Senecio. Senecio. XIX, 42, 73. 
1. Heads with small bracts at the base, like an outer 
i n v o 1. Senecio auct. ...... 2 
— Heads with no outer invol. (Is undiv., crenate-dentate 
or almost entire, the caul, much reduced. Heads 8—15, 
in a corymb. Achenes hairy). Cineraria auct. . 18 
2. Ls pinnatifid or 1- or 2-pinnatipartite, rarely undiv. and 
then cordate at the base . . . . . 3 
— Ls all undiv., entire or toothed, lanceolate or oblong, 
the lower ones sometimes oval .... 13 
3. FIs all tubular. Invol.-leaflets black in the upper portion. 
Achenes hairy.—Cultivated ground, road-sides; every¬ 
where. 4—10 ..... vulgaris L. 1210. 
— Marginal fls ligulate, ligules narrow, rolled back 1 
— Marg. fls ligulate, ligules broader, spreading (rarely 
0 in 1216 and 1218). 5 
4. Leaflets of the outer invol. loose, half as long as the 
invol. Achenes, at last, glabr. PL glandular-viscous.— 
Stony places, wood-clearings; distrib. (wanting in L.). 6 
viscosus L, 1211. 
— Leaflets of the outer invol. appressed, about 1 /e the length 
of the invol. Achenes gray-hairy. PI. not, or scarcely, 
glandular.—Wood-clearings, congregated; 6, 7 
sylvaticus L. 1212. 
5 (3). Ls glabr., webbed-woolly, or slightly gray-tomentose 
underneath; petiole gen. auricled. ... 6* 
— Ls (pinnatifid or inciso-crenate) white-tomentose on both 
sides; petiole not auricled. (Alpine pis of 3—10 cm in 
height.) Type of S. incanus . . . . . 13 
6. Ls undiv., slightly gray-tomentose underneath, the lower 
cordate-oval. Achenes glabr. S. cordatus Koch.— 
Alp. and subalp., especially near chalets; wanting in 
the Jura. 6 cordifolius Clairv. 1213. 
— Ls pinnatifid or 1- or 2-pinnatipartite, or lyrate and 
undiv., but never cordate ..... 7 
7. Leaf-rachis toothed. Ann. or bienn. pis. Invol.-leaflets 
long, black at the top, S. laciniatus Bert.—Subalp. GL 
(Engadine, Munsterthal). 7 . . nebrodensis L. 1214. 
— Rachis not toothed. (Perenn., rarely bienn., pis) 8 
8. Ls glabr., 2-pinnatisect, with narrow linear segments. 
FIs orange-yellow.—High Alp.; GL T. A. (eastern Switz.). 7 
abrotanifolius L. 1215. 
— Ls glabr. or hairy, lyrate-pinnatifid or simply pinnati- 
sect .......... ,9 
9. Leaflets of the outer invol. 4—6, about half as long as 
the invol. Rt-stock creeping (up to 15cm). Ls more or 
less gray-webbed, all pinnatifid, the upper with small 
