297 



differs in the leaves, which are tomentose on both sides and have 

 shorter not acuminate segments, and in the somewhat larger, 

 strictly sessile heads with tomentose bracts. 



Type: J. H. Flodman, no. 882, 1896, from Little Belt Moun- 

 tains. 



Artemisia floccosa. 



Stem stout, 5-7 dm. high, striate, tomentose; leaves pinnately 

 divided into oblong segments, loosely white-tomentose on both 

 sides ; heads 5-6 mm. in diameter, erect, evidently pedicelled, in 

 an elongated narrow raceme or panicle ; bracts oval, scarious- 

 margined and tomentose. 



It is nearly related to the preceding, differing mainly in the 

 looser tomentum, and the erect pedicelled slightly smaller heads. 

 From A. Tilesii elatior it differs in the tomentum, the form of the 

 leaves, and the erect heads with tomentose bracts. 



Type: P. A. Rydberg, no. 2942, Lima, Aug. 6, 1895. 



Arnica fulgens Pursh, Fl. Am. Sept. 2: 527. 1814. 

 I think that this is distinct from A. alpina, differing in the fol- 

 lowing characters: taller, stem often 3-4 dm. high, shorter pubes- 

 cence, often 3 or 4 smaller heads, much broader and dentate leaves 

 and often as many as many as 3 or 4 pairs of stem leaves. 



It was collected by Mr. Flodman at Little Belt Pass, no. 891. 

 1896. My own specimens, no. 823, from the Black Hills, also be- 

 long here. 



Arnica gracilis. 



Stem slender, 1-2 dm. high ; whole plant glabrous, except a 

 httle glandular puberulence on the pedicels and involucre; basal 

 leaves broadly ovate, petioled, dentate, 3-ribbed ; stem leaves 

 about 2 pairs, similar, the upper sessile; heads 1-3 ; disk 10-15 

 mm. high; bracts 12-15, oblong-lanceolate, acuminate; ^^y^ about 

 15 mm. long; achene almost glabrous. 



It much resembles the preceding and may perhaps be a form 

 of it, but differs by the smaller heads, the glandular-puberulent 

 involucre and pedicels and the glabrous foliage and stem. It ap- 

 proaches depauperate forms of A. latifolia. 



Type: J. H. Flodman, no. 901, 1896, from the Spanish Peaks. 



Arnica pedunculata. 

 Stem 3-6 dm. high, finely villous-pubescent, striate ; basal 

 leaves broadly oblong to almost linear, entire, 3-ribbed, tapering 

 into a more or less winged petiole; stem leaves about 2 pairs, 



