NEW OR NOTEWORTHY SPECIES. 105 
ARNICA DENUDATA. Stems solitary, from extensively 
ereeping horizontal slender rootstocks, 2 to 3 ft. high, leafless 
below (at flowering time) and with greatly elongated inter- 
nodes, the upper leafly and tlowering portion green and only 
slightly viscid-puberulent even to the involucres: leaves in 
. about 4 pairs, lanceolate, subentire; upper pairs broader and 
sessile, lower narrower and short-petioled, but at base con- 
nate-vaginate: heads 3 or 5, the lateral peduncles well sur- 
passing the terminal one: disk-corollas slender-funnelform, 
the tube densely pubescent: achenes sharply angular, and 
hispid on the angles; pappus dull-white, barbellate. 
In wet meadows of the Humboldt River, near Deeth, Ne- 
vada, 14 July, 1896. 
n à Var. CANESCENS, growing with the type, and confluent 
with it, the whole herbage is canescently tomentatose, and 
the leaves are broader and dentate. | 
SENECIO ACCEDENS. Stems several from the root, about 
2 feet high, leafy below, somewhat corymbosely panicled 
above, with rather few and large nodding heads: leaves 
narrowly lanceolate, acute, denticulate, on long and slender 
petioles which are much dilated below, the whole herbage 
sparsely flocculent when young, at flowering time glabrous 
ornearly so: heads about inch high; bracts of the narrow- 
campanulate involucre oblong-lanceolate, scarious-margined, 
the few calyculate ones ligulate; rays none ; ovaries glabrous. 
In open woods at Marshall Pass, Colorado, 4 Sept., 1896 ; 
barely in flower at that date. Plant with the foliage of S. 
cernuus nearly, but of different mode of growth and inflores- 
cence ; the large nodding heads almost those of 5. Rusbyi. 
SENECIO ATRATUS. Stems several or many, closely tufted, 
decumbent at base, stoutish, a foot high or more, leafy up to 
the dense compound corymbiform cyme of small ame 
herbage flocculently tomentose even in maturity: radica 
leaves 6 to 10 inches long, oblanceolate, acutish, dentate or - 
