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Al2 DESCRIPTIONS OF NEW SPECIES 
the inflorescence six to eight inches long, the lateral branches terminating in thyrsoid clusiers ; 
tubular florets twenty to thirty. 
Senecio * Purshianus; 1, softly and whitely tomentose, subceespitose ; leaves 
lanceolate-oblong, entire, cauline amplexicaule, lanceolate, incisely dentate at 
base ; ~ pe heel irregular, simple, few-flowered, the pedicels elongated, bracteo- 
late; rays about eight; sepals about twelve, linear-lanceolate; receptacle convex! 
achenium smooth, pentagonal, ten-striate; pappus as long as the florets. Czne- 
raria imtegrt gfola, Pursu, non WILLD. Senecio integrifolus, Nourr. Gen, Am., 
BE cxstsins (banks of the Platte,) also the’ banks of the Missouri. Allied to Z. 
siabadnaist but in that, besides other differences, the achenium is hirsutely ribbed. Nearly allied 
to S. canus, but with a different achenium, and stem leaves. 
Senecio subnudus; (DECAND., Vol. VL, p. 428;) or, smooth ; stem erect, simple, 
_with one capitulum; lower leaves long petiolate, cuneate-spathulate, obtuse, 
denticulate, cauline sessile, the upper sublanceolate, incisely dentate at base; 
upper part of the stem scapoid and nearly naked; capitulum subhemispherical, 
slightly bracteolate; sepals about twenty, acuminate; rays twelve to fifteen, 
longer than the involucrum; achenium smooth, pappus as long as the florets. 
Has. The Cascade Mountains on the Oregon; (the late Dr. Gairdener, from whom I received 
the only specimen I possess.) It appears to be somewhat allied to §. Cymbalaria of Pursh. 
Petiole longer than the leaf; the leaf less than an inch long, scarcely a quarter of an inch wide, the 
uppermost reduced to slender subulate bractes. Stem eight or nine inches high, and in all the 
specimens I saw with a solitary capitulum. 
4 Senecio * Cymbalarioides; 2, very smooth, except the axils of the leaves, 
which are arachnoidly floccose; radical leaves cuneate-oval, very long vides 
serrate; ‘cauiline oblong, incisely serrate or subpinnatifid, narrowed below, the 
beng Ewepissceyle, oa ia leaves very smalls come simple, four to eee 
short, of fifteen acuminate, asietls ice daria apabs: rays saset eigh t, me 
oblong, longer than the involucrum; achenium smooth, angular, ten-striate; 
pappus as long as the florets. 
Has. In Oregon. Allied to 8. balsamitz, but with the radical leaves shorter, entire at the base, 
Peticles, and with the capituli larger and fewer. . Lower leaves about an inch long by 
rs of an inch wide, appearing short, oval, and are mostly cuneate and entire at base; 
pounle two oF three times as long as the leaf ; at the very base wis, is seen a tuft of loose 
floceose down; the leaves 
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