SENEcio COMPOSITAE 379 



cised or somewhat pinnatifid : involucre open-campanulate, 4-5 lines high, 

 of linear acute bracts : rays 8-12, elongated oblong : achenes glabrous, 

 striate. In marshy grounds. Cascade and Rocky Mountains. 



S. elongatus Pursh Fl. ii, 529. 5. cmreus var. borealis T. & G. Stems 

 10-30 inches high : leaves thickish ; the radical from roundish with abrupt 

 or even truncate base to cuneate-obovate and cuneate spatulate, 6-12 lines 

 long, slender-petioled : cauline seldom much pinnatifid ; heads numerous 

 or few, not rarely rayless : achenes glabrous. In the high mountains Brit, 

 Columbia to California and the Rocky Mountains. 



S. Adamsi. Floccose-woolly below, glabrous above except the axils of 

 the leaves : stems 4-12 inches high : radical leaves obovate or oblong to al- 

 most orbicular, crenately toothed, the blade 6-18 lines long, on slender pet- 

 ioles as long or longer; cauline leaves lanceolate to linear in outline, pin- 

 nately lobed or parted into oblong or linear lobes or divisions, sessile by 

 a somewhat clasping base : heads 1-12, in a close or at length open cyme : 

 involucre hemispherical, of numerous linear-lanceolate acute bracts, 4-5 

 lines long: rays 12-15, elongated oblong: achenes glabrous, about a line 

 long. By the base of cliffs, Mount Adams Washington. 



= = ~ Leaves mostly once pinnately divided or parted and 



again lobed or incised. 



S. Bolanderi Gray Proc. Am. Acad, vii, 362. Glabrous or early glab- 

 rate: stems weak and slender, 6-30 inches high from slender creeping 

 rootstocks: leaves thin and membraneous, mostly petioled: early radical 

 orbicular, subcordate, palmately 5-9 lobed or crenate-incised;others pin- 

 nately divided into 5-9 distinct leaflets or the upper lobes confluent with 

 rounded terminal one, all obtusely incised; heads several, loosely cymose 

 4 or 5 lines high, rays 5-8, rather long. Common along streams and 

 bluffs Washington to Northern California west of the Cascade mountains. 

 ++++++++++ Stems leafy, numerously or somewhat equably so 



up to the top. 



S. condensatus Greene Pitt, iii, 298. "Stems solitary, stout and low, 

 very leafy, 4 to 6 inches or rarely almost a foot high: herbage somewhat 

 succulent; sparsely flocculent when young: lower leaves almost as 

 long as the stem, spatulate-obovate; the upper oblanceolate, all ob- 

 tuse, crenately or more sharply dentate; heads 3 to 6, more than V2 

 inch high, closely sessile in a large cluster among the upper leaves: 

 bracts of the decidedly flocculent involucre lanceolate, acuminate: rays 

 either wanting or few and deep yellow." High ridges of the Blue 

 Mountains, Walla Walla Co., Washington, Piper. 



§ 2 Annuals or biennials. 



S. vuLGAEis L. Engl. Bot. t., 748. (Groundsel.) Rather stout, branch- 

 ing and leafy to the top glabrate 4-1& inches high from an annual root: 

 leaves incisely pinnatifid the long or roundish lobes and the sinuses 

 sharply toothed: heads 4-5 lines high: tips of the involucral bracts and 

 the short calyculate ones at base blackish : rays none : achenes canes- 

 cently puberulent, common in cultivated fields and moist places, flower- 

 ing most of the winter months. (Nat. from Eu.) 



Tribe viii. CYNAROIDEAE B. & H. Gen. ii, 211. Heads hom- 

 ogamous tubiflorous, the flowers all hermaphrodite with equally 

 or sometimes uneqit-ally 5-cleft corollas, the lobes long and nar- 

 row, or sometimes radiatiform and heterogamous by enlargement 

 of the limb of marginal flowers which are comrhonly neutral. 



