Senecio. COMPOSITiE. 383 



& Gray, PI. ii. 449. A. plantar,inea & .1. fulgens, Pursli, Fl. ii, 527. - Labrador and north to 

 the aretK- coast, west to the Aleutian Islands, south to the Sierra Nevada, California, and to 

 Colorado m the Rocky Mountains; the sonthern forms comparatively large and broad- 

 leaved. (N. Eu., Greenland.) 



Var. Lessingii, Toru. & Gray, 1. ,-., perhaps from Kotzebue Sound, is a thinner- 

 leaved form, of la.x habit; the akenes only sometimes glabrous, and the anthers not "black- 

 ish. — A. alpma, Less, iu Linn. vi. 2.'i.5 ; Herder, PI. Radd. ii. 110. (N. E. Asia.) 



= = Anthers black: leaves broad: head large, solitary. High Northwestern species. 



A. Unalaschensis. Less. Rol>iist, a span or two high, hirsnte or villous : lea\'es oblong, 

 mostly acutish and ooviouslT serrate or denticulate with subulate callous teeth : disk-corollas' 

 glalirous or nearly so: akencs slightly hairy or glabrate. — Linn. vi. i:35 ; Herder, 1. c — 

 Vnalaska, and other Aleutian Islands, Behri'ug Ishind, &c. ; flrbt coll. by Chamisso. ' 



A. obtusifolia, Less. 1. c. Taller or longer-pedunculate, pubescent or glabrate : leaves 

 oblong or spatulatc, very obtuse, almost or quite entire, nervose : disk-corollas " glabrous " 

 or upper part of the tube hispidulous : akenes glabrous : resembles A. montana. — Unalaska, 

 Chamisso. Shumagiu Islands, I[arrington. 



192. SENECIO, Tourn. Groundsel. (Old Latin name of GrouDdsel, 

 from senex, old man, in allu.sion to the hoary pappus.) — One of the largest 

 known genera, very widely dispersed over the world, most of the species (all of 

 ours) herbs ; with alternate leaves, and yellow-flowered heads of middle or rarely 

 larger size : fi. spring and summer. Minute short hairs or papillae on the akenes 

 of most species swell and emit a pair of spiral threads when wetted. Before 

 wetting the akenes may be really or apparently glabrous, and after wetting be- 

 come canescent. — Less. Syn. 391; DC. Prodr. vi. 340; Benth. & Hook. Gen. 

 ii. 446, partly. — Arrangement wholly artificial. 



S. Canadensis, L., Spec. ii. 869, and Cineraria Canadensis, L. Spec. ed. 2, ii. 1244 (to 

 which Nutt., Gen. ii. 165, gave the name of S. Kalmii), were said to be of "Canada, Kalin." 

 They are not so indicated in the Linucean herbarium: both are probably South European 

 specimens. The first belongs to .S'. artemisicef alius, Pers. ; the second is a thinner-leaved form 

 of Ciiipraria marltlma, L., the 5. Cineraria, UC. — Cineraria Carolinexsis, Walt. Car. 207, 

 is undeterminable. 

 '^^ — S. ciliAtus. Walt. Car. 208, is probably only Erigeron CanarJeine, L. 



S. flocciferus, DC. Prodr. vi. 426, is Malacotlirix ohtusa, Benth. 



S. Cineraria, DC, the Distv-Miller of house-cultivation, has been found wild on the 

 beach of San Francisco Bay, California, at Alameda. 

 ^"^*S. JaoobJ:a, L., of Eurojie, and some other species, occasionally occur as ballast waifs. 



S. PAlmeri, Gray, a peculiar frutescent species of Guadalupe Island, off Lower California, is 

 quite beyond our limits. 



§ L Perennials (one or two suffruticose) ; with pubescence, if any, of a tomen- 

 tose character, mostly floccose and when deciduous leaving the surface smooth and 

 naked, never viscid nor obviously hirsute. 



* Heads an inch or distinctly over half-inch high, very many-flowered. 

 -t— Disk-corollas deeply 5-toothed: heads of the largest. 

 S. Rugelia, Gray. Lightly floccose-tomentose when young, soon glabrate : stems simple, a 

 foot high from a creeping rootstock, bearing 3 to 5 naked slender-pedunculate somewhat 

 racemosely disposed heads : lea:-es membranaceous ; radical and lowest cauline ovate, den- 

 ticulate, 2 to 5 inches long, long-petioled ; others small and few, bract-like, sessile : involucre 

 not calyculate, of about 12 linear-lanceolate thickish glabrous bracts: rays none: pappus 

 rather sordid. — Proc. Am. Acad. xix. 54. Riir/<-lia nudicaulis, Shuttlew. in coll. Rugel; 

 Chapm. El. 246. — Woods, Smoky Mountains, N. Carolina and Tennessee, Rugel, Buckleg. 

 Style-branches capitellate-truncate and pubescent at summit, and a few obscure minute 

 hairs on the back. 



