444 COMPOSITE. Senecio. 



nearly as long as those of the involucre ; " achenia somewhat glabrous." — 

 DC. ! prodr. 6. p. 429. 



California, Douslas ! — Leaves 3 inches long, 2 lines wide. Rays 11-13 ; 

 the disk-flowers about 60. DC. 



28. 5. filifolius (Nutt.) : suffruticose, much branched ; the branches dif- 

 fuse, very leafy to the summit; leaves pinnately 5-9-parted ; the segments 

 very narrowly linear, entire, obtusish, often unequal, mostly with revolute 

 margins ; heads (rather large) corymbose, on short peduncles, calycufete with 

 a few small subulate scales ; rays about 7, linear, somewhat elongated ; 

 achenia strigose-canescent. 



a. Jamesii : densely tomenfose-canescent ; the wool evidently more or less 

 deciduous. — S. filifolius, Nutt. ! in trans. Amer. phil. soc. I. c. p. 414. (De- 

 scribed from an imperfect specimen in herh. Torr.) 



/?. Fremontii : glabrous, or obscurely arachnoid. 



On the Upper Missouri or Platte, Dr. James! 0. On the Lower Plattej 

 near the " Chimney," Lieut. Fremont! Aug.-Sept. — Segmenlsof the leaves 

 an inch or less in length, half a line wide ; the rachis about the same width. 

 Heads smaller than in the following species. Rays golden yellow. 



29. S. Riddellii: glabrous throughout; stem terete, very leafy, corymbose 

 at the summit; cauline leaves pinnately 5-9-parted ; the segments narrowly 

 linear, obtuse, entire, flat, somewhat dilated towards the apex, (ihickish and 

 rather rigid) ; heads (large and showy) on short peduncles, disposed in a 

 compound corymb, calyculate with subulate scales ; rays about 12, linear, 

 elongated; achenia minutely puberulent. — S. fragrans, Riddell! mss., not 

 Fisch. 



Texas, Dr. Riddell! — 11 ? A stout species, apparently 1-2 feet high, 

 leafy to the summit. Radical leaves unknown : cauline not at all auricu- 

 late or dilated at the base; the segments an inch or more in length, and 1-2 

 lines wide: the rachis about the same width, and entire. Heads much 

 larger than in S. abrotanifolius : scales of the involucre 16-18, linear-laiice- 

 olaie, not sphacelate, nearly the length of the disk. Rays golden yellow. 

 Pappus very white, as long as the disk-corolla. 



30. S. eremophilus (Richards.): glabrous; stem striate, tall, branching; 

 leaves membranaceous, interruptedly pinnatifid, the lower somewhat bipin- 

 natifid ; the segments lanceolate or oblong-linear, unequal, acute, often 

 toothed ; heads in a compound corymb : the calyculate scales few and loose, 

 nearly as long as the cylindrical involucre ; rays (about 9) linear, spreading; 

 achenia nearly glabrous. — Richards. ! apj^^- Frank, journ. ed. 2. p. 31 ; 

 Hook.! fl. Bor.-Am. 1. p. 334. 



Woods of the Saskatchawan (Drummond) to Fort Franklin on the Mac- 

 kenzie River, Richardson ! — Stem 2-3 feel high. Leaves ample ; the 

 lower 5-8 inches long. 



t + t t t t Leaves all bipinnately dissected: involucre nearly ecalyculate. 



31. S. Millefolium, : floccose-lanuginous when young, at length glabrous ; 

 stems striate, csespitose, corymbose at the summit; leaves chiefly radical, 

 petioled, bipinnately divided; the segments often 2-5-parted, linear, obtuse; 

 cauline leaves few, sessile, irregularly 1-2-pinnately dissected ; corymb 

 dense, fasligiate, mostly compound; scales of the hemispherical minutely 

 1-2-bracteolate involucre about 20, linear; rays 9-12, oblong, short; achenia 

 minutely hairy on the angles; pappus equalling the corolla of the disk. 



Mountains of North and South Carolina: "Carolina, Fraser," in herb. 

 Lambert! Whiteside Mountain, North Carolina, Mr. Curtis! Table 

 Mountain, S. Carolina, Mr. Buckley! June. — It A foot or more high. 

 Leaves rather fleshy ; the numerous segments 2-3 lines long. Heads smaller 



