4 38 COMPOSITiE. Senecio. 



hairy or nearly glabrous ; the upper partly clasping by a cordate base ; heads 

 corymbose at the summit of the stem or branches ; pedicels not bracteolate ; 

 scales of the involucre about 20, in a single series, linear, acuminate; rays 

 20-21 ; achenia glabrous, with many narrow somewhat unequal ribs. — DC. ! 

 prodr. 6. p. 363; Hook.! fl. Bor.-Am. 1. p. 334. Cineraria palustris, 

 Linn. spec. ed. 2. p. 1243; Fl. Dan. t. bl^ ; Engl. hot. t. 151; Schkuhr, 

 handb. t. 246 ; Richards. ! appx. FranU. journ. ed. 2. p. 31. 



fi. congestns (Hook.! 1. c): very woolly; stem simple (4 inches to a foot 

 high); leaves linear-ligulate, undulate or sinuate-toothed; heads crowded or 

 capitate.— S. congestus, DC. I. c. Cineraria congesta, R. Br.! in Parry's 

 1st voy. appx. p. 279 ; Hook. SfArn.! hot. Beechey, p. 126. 



Saskatchawan ! (also saline marshy margins of Devil's Lake, N. W. Ter- 

 ritory, Mr. Nicollet .') to the Arctic Sea ! Kotzebue's Sound ! &c. the var. 8. 

 confined to the arctic regions, and Melville Island ! July.— Rays pale yellow. 

 Pappus very copious, at first scarcely longer than the tube of the disk- 

 corolla, at length very much longer than the flowers. — To this species, a_s 

 thus considered, may probably be referred S. Kalmh, Less, in Linncea, 6. 

 p. 244. 



7. iS. Hookeri : biennial ? arachnoid-pubescent, at length somewhat gla- 

 brous ; stem simple; radical and lowest cauline leaves ovate or spatulate- 

 oblong, obtuse, repand-denticulate or entire, contracted into short margined 

 petioles; the upper Unear-lanceolate, acute, entire, sessile ; heads numerous, 

 in a contracted and dense simple corymb ; scales of the involucre about 12, 

 nearly glabrous; rays 8-9, oblong, short (bright yellow ?) ; achenia glabrous; 

 pappus rather shorter than the 10-nerved corolla of the disk. — S. integrifolia, 

 Hook. ! fi. Bor.-Am. (excl. syn.), not of Nult. Cineraria integrifolia, 

 Richards, appx. Frankl. journ. ed. 2. p. 31 ; not of Jacq., Willd., Pursh, Sfc. 



Woody country from lat. 54° to the shores of the Arctic Sea, Richardson. 

 Rocky Mountains (lat. 52°), Drummond !—F\auts 6-12 inches high, with 

 fibrous roots, clothed when young with loose woolly hairs. Heads smaller 

 than in S. spathulaefolius. Leaves perfectly smooth when the pubescence 

 has fallen. 



» * » • Perennial : heads corymbose, chiefly radiate. 



t Leaves entire or denticulate. 



8. S. spartioides : glabrous throughout; stems suffruticose, very nume- 

 rous from the same ligneous tap-root, rigid, corymbose at the summit, leafy; 

 leaves fleshy, narrowly linear, perfectly entire, rather obtuse, sessile; heads 

 (large and showy) fastigiate-corymbose,on short minutely bracteolate pedun- 

 cles ; the calyculate scales subulate, minute; scales of the cylindrical invo- 

 lucre about 12, lanceolate-linear, acutish ; rays mostly 7, oblong-linear, 

 elongated ; achenia silky-canescent. 



Upper Platte ; on a steep sand-bank of the Sweet-water River, Lieut. 

 Fremont! Aug.-Sept. — Stems a foot high, forming a dense tuft. Leaves 

 1-3 inches long, about a line wide, very numerous. Heads half an inch 

 in length. Rays golden-yellow. Pappus as long as the disk-corolla. — 

 A remarkable and handsome species. 



9. S. megacephalus (Nutt.) : clothed with a deciduous wool, at length al- 

 most glabrous; stem low, stout; leaves lanceolate, acute, entire or obscurely 

 denticulate; the lowermost tapering into petioles; the upper linear-lanceo- 

 late and partly clasping; corymb of 3-5 very large heads; scales of rhe 

 nearly ecalyculate vilTous-pubescent involucre linear, acuminate, not spha- 

 celate; rays 10-12, (pale yellow), short; achenia glabrous ; pappus as long 

 as the corolla of the disk.— iVu«. .' in trans. Amer. phil. soc. (n. ser.) 7. 

 p. 410. 



