MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 45 1 



JV. T. Shazu ; Indian Creek, July 21, 1897, Rydberg & Bessey, 

 5214.; Pony, July 6, 5^ 75. 



*Carduus Flodmanii. 



Stem comparatively slender, 0.5-1 m. high, somewhat angled and 

 striate, more or less covered with a cottony pubescence ; leaves 

 more or less floccose, but green above, densel}^ white-tomentose be- 

 neath, deeply divided into linear-oblong or lanceolate acute lobes 

 tipped with rather weak yellowish spines ; heads campanulate 

 or sometimes nearly cylindric ; bracts imbricated, the outer much 

 shorter, ovate, the inner lanceolate, all more or less floccose on the 

 margins, especially when 3'oung, and with a narrow glandular 

 ridge, all but the innermost tipped with a weak erect or slightly 

 spreading spine ; corolla rose or reddish purple ; achenes striate ; 

 pappus plumose. 



Nearest related to C. discolor and C. Jilipcndiilus. From the 

 former it differs in the more slender stem, the smaller heads, the 

 deeper dissected leaves and the more cottony pubescence. From the 

 latter it differs in the more dissected leaves and the lack of the 

 tuberous roots. I have dedicated this species to my friend and com- 

 panion during two of my summer trips, Mr. J. H. Flodman, of Lu- 

 ther Academy, Wahoo, Nebraska. Grows in rich meadow-land, at 

 an altitude of 1000-1500 m. 



Montana: East Gallatin Swamps, 1896, Flodman^ Sjg (type); 

 Madison Co., 1886, Tivccdy, 1126: Judith Mts., 1882, R. W. 

 Springer ; Glendive, 1887, J. H. Sandbcrg. 



Nebraska: Platte Valley, near Horse Creek, 1891, Rydberg, 216. 



AMBROSIACEAE. 



Iva xanthiifolia Nutt. Gen. 2: 185 [111. Fl. 3: 294; Syn. Fl. i- : 



246; Man. R. M. 179] ; Cyclachaena xanthiifolia Fresen. Ind. 



Sem. Hort. Frankf. 4. 



In valleys and waste places, up to an altitude of 2000 m. 



Montana: Helena, 1892, F. D. Kchey ; Fridley, Aug. 22, 

 1897, Rydberg & Bessey. 

 Iva axillaris Pursh, Fl. Am. Sept. 743 [111. Fl. 3: 293: Syn. Fl. 



I-: 247; Bot. Cal. i: 343; Man. R. M. 180]. 



On river-banks and in bad-lands, up to an altitude of 2000 m. 



Montana: Sand Coulee, 1885, R. S. Williams, 26 j ; Beaver 

 Head Co., 1888, Ttveedy, 2151 Great Falls, 1886, F. W. Ander 

 son, 22y ; Missouri River, 1893, Scribncr, 102. 



