48 LEAFLETS. 



inner narrower, either wholly hyaline, or with only a green 

 midvein, rays short, yellow, their ovaries altogether abortive: 

 disk-corollas with tube and subcylindric throat of about equal 

 length ; the former villous about the summit : achenes slender 

 cylindric, striate, hirsutulous ; pappus dull white, barbellate. 

 Open woods in the Wind River Mountains, Wyoming, Dr. 

 W. H. Forwood, 23 July, 1881. Type in U. S. Herb. - 



Arnica parvifolia. Woodland plant of low stature and 

 from horizontal rootstocks ; pair of basal leaves cordate, more 

 than 2 inches long, on slender petioles about as long, acutish, 

 repand-denticulate or dentate, thin, green, both faces with a 

 few scattered short hairs and minute glands ; stem leaves in 

 about 3 pairs, lanceolate or ovate-lanceolate, small, the blade 

 seldom more than 1 inch long, sessile in the upper pair ; head 

 solitary, or rarely 2 or 3, large, short, peduncled ; involucre 

 campanulate ^ inch high, of about 10 thin linear-lanceolate 

 acuminate, bracts more or less villous and glandular on the 

 back: rays large and long, about 12 or 14, yellow: achenes 

 slender, sparsely setulose ; pappus firm and delicate, white, 

 barbellate. 



Peculiar small-leaved and even leafy-stemmed ally of A. 

 cordifolia, the type specimens in my herbarium from Marshall 

 Pass, Colo., 19 July, 1901, by C. F. Baker, n, 515. 



Arnica lasiosperma. Apparently cespitose, slender and 

 low, in maturity only 6 inches high, firm and wiry rather than 

 succulent, not obviously pubescent, the stem and leaf margins 

 under a lens showing scattered hairs : leaves small, the cauline 

 in 2 or 3 pairs, oblong-lanceolate to lanceolate, acute, entire, 

 sessile: heads 1 to 3, on peduncles 2 inches long; involucres 

 campanulate, of 10 or 12 oblong-lanceolate merely acute 

 bracts : rays rather long, light-yellow ; disk-corollas with 

 densely appressed-villous short tube and about equal subcy- 

 lindric glabrous limb : achenes cinereous wnth a dense fine 

 appressed pubescence ; pappus white, barbellate. 



Subalpine in Estes Park, at base of Long's Peak, Colorado, 

 26 Aug. 1895, Geo. E. Osterhout. 



£ 











