390 COMPOSITE. Senecio. 



S. Cardamine, Greexe. Scapes a span or two high, slender, bearing solitary or 2 or 3 

 small (al)uiit 4 lines high) heads, and below one or two very small oblong-cordate clasping 

 piunatifid-deutate bract-like leaves : radical leaves orbicular-cordate, repaud-creuate, thiunish, 

 inch or two in diameter, on long slender petioles: rays about 8, pale yellow. — Bull. Torr. 

 Club, viii. 98. — New Mexico, on the higher slopes of the Mogollou Mountains, Greene. 



d. Stems low (2 to 6 inches high) and slender, 1-2-cephalous, few-leaved: leaves mostly lyrate- 

 pimiatitid. High northern species. 



S. resedif olius, Less. Glabrous or soon glabrate : stems simple : earlier radical leaves 

 roundish or subcordate, crenate or crenately lobed, later ones lyrate-jnnnatifid, slender- 

 petioled, all or the terminal lobes creuate-incised : heads 4 or 5 lines higli : involucre very 

 obscurely bracteolate : rays 5 lines long : style-branches commonly with slender cusp : 

 akenes either papillose-hirsute or glabrous. — Less, in Linn. vi. 243 ; Hook. Fl. i. 33.3, t. 117 ; 

 Torr. & Gray, Fl. ii. 445. Cineraria lijrata, Ledeb. Fl. Alt. iv. 102; Reichenb. Ic. Bot. 

 Crit. ii. t. 101. — From Great Bear Lake, &c., near the Arctic Circle, to Kotzebue Sound and 

 the Aleutian Islands. (N. Asia.) 



Var. Columbiensis. Heads rayless : stems often sparingly branclied and 2-4- 

 leaved. — Mucklung River, British Columbia, Mr. Muckaij. 



e. Stems a foot or two high (or in reduced forms lower), bearing some leaves and corymbosely 

 cj-mose (only wiien depauperate solitary) heads: involucre sparingly or inconspicuously calj'cu- 

 late, or nearly naked at base : foliage various. Not arctic nor alpine, except perhaps one vari- 

 ety of S. aureus: usually some floccose tumentuni, at least when young. 



1. Leaves all entire, rarely a tooth or a few obscure denticulations, and narrowed at base. 

 S. fastigiatus, Nutt. Cinereous with a fine and close pannose tomentum, or glabrate : 

 stems strict, simple, 1 or 2 feet high, terminated by a fastigiate cyme of several heads, or 

 sometimes with branches terminated by single and rather larger heads : leaves lanceolate 

 or spatulate-lanceolate, obtuse, about 2 inches long ; upper often linear ; lower cauline and 

 the sometimes oblong radical tapering into slender petioles : heads 4 or 5 lines high : rays 

 conspicuous: akenes glabrous. — Trans. Am. Phil. Soc. vii. 410; Torr. & Gray, Fl. ii. 439. 

 — Plains of Oregon, Washington Terr., and adjacent Idaho ; first coll. by Niittull. 



Var. La^nese. Stems disposed to branch, and the liranches to bear 2 or 3 or some- 

 times solitary heads, of half-inch in height : leaves mostly apiculate-acute. — 6\ Laijnece, 

 Greene in Bull. Torr. Club, x. 87. — Sweetwater Creek, El Dorado Co., California, Mrs. K. 

 Laijne-Curran. 



2. Leaves from entire or serrate to pinnatitid in the same species, none pinnately divided : raj's 

 occasionally wanting. Species of perhaps impossible limitation. 



S. canus, Hook. Permanently canescent with pannose tomentum, or at length flocculent, 

 but rarely at all glabrate : stems from a span to a foot or rarely 2 feet high : leaves some- 

 times all undivided or even entire, the radical and lower from spatulate to oblong or round- 

 ish-oval (half-inch to thrice that length) and slender-petioled, sometimes laciuiate-toothed 

 or pinnatifid (either the upper or lower ones, or both) : heads 4 or 5 lines high : akenes 

 very glabrous (in figure of Hooker hispidulous on the angles) : style-tips usually with central 

 cvisp. — Fl. i. 333, t. 116 ; Torr. & Gray, 1. c. ; Gray, Bot. Calif, i. 412. S. integrifolius, Nutt. 

 Gen. ii. 165. Cineraria integrifolia minor, Pursh, Fl. ii. 528. S. Piirshianus, Nutt. Trans. 

 Am. Phil. Soc. vii. 412. S. HoweUii, Greene, Bull. Torr. Club, viii. 98. — Rocky banks, 

 Saskatchewan and Dakota to the mountains of Colorado, west to Brit. Columbia, Oregon, 

 Nevada, and the Sierra Nevada as far as Kern Co., California. — A notable and dubious 

 form, low and stout, with comparatively large heads and always undivided leaves, abounds in 

 the mountains of Colorado, at the u])j)er limit of trees. 



S. tomentosus, Michx. Canescent or cinereous with a close or at length floccose and 

 more or less deciduous wool : steins rather stout, commonly 2 feet high : leaves thickish, ob- 

 long, crenate or sometimes entire ; the larger radical ones ample, 5 or 6 inches long, on 

 elongated stout petioles and with stout midrib; cauline similar and smaller or lyrate-pin- 

 natifid, often few and small : heads, &c., of the next species : akenes always hispidulous, at 

 least on the angles. —Fl. ii. 119; Ell. Sk. ii. 329; Torr. & Gray, Fl. ii. 443. S. integri- 

 folius, var. heterophnUus, Nutt. Gen. ii. 165. Cineraria JiefcropJti/lla, Pursh, Fl. ii. 528. — 

 Open or sparsely wooded moist ground, Delaware to Florida and Arkansas ; first coll. by 

 Michaux. 



