432 MEMOIRS OF THE NE\V' YORK BOTANICAL GARDEN. 



* Artemisia tenuis integerrima. 



Less slender ; leaves all, except the very lowest, lanceolate, entire, 

 2-3 cm. long; involucre more greenish. 



May be a good species, but the material is too meager, consisting 

 of only two specimens. Growing with the t3^pe. 



Montana: Emigrant Gulch, August 23, Rydbcrg & Besscy, 

 §20ia. 



Artemisia tripartita ; Aj-temisia trijida Xutt. Trans. Am. Phil. Soc. 



(II.) 7: 398, 1841 [Syn. Fl. I-: 375; Man. R. M. 203 ; Bot. Cal. 



I : 405] ; not Turcz. 1832. 



Rare in the region, growing on dry hills, plains, etc. 



Yellowstone Park: 1883, Miss Alary Compton. 

 Artemisia arbuscula Nutt. Trans. Am. Phil. Soc. (II.) 7: 398 [Syn. 



Fl. I-: 374; Man. R. M. 203; Bot. Cal. i: 405]. 



On plains and valleys, at an altitude of 2000-3000 m. 



Montana: Ennis, 1886, Tzuccdy, iioj: Radersburg, 1882, 

 Candy. 



Yellowstone Park : 1884, Tzvccdy,i8p; Upper Geyser Basin, 

 Aug. 8, 1897, Rydberg & Bessey, j2oj. 



Artemisia tridentata Nutt. Trans. Am. Phil. Soc. (II.) 7: 398 [Syn. 

 Fl. I-: 374; Man. R. M. 203: 111. Fl. 3: 468; Bot. Cal. i: 



405]- 



Rather common on dry hills and plains, at an altitude of 1000- 



2500 m. 



Montana: Belt River, 1886, R. S. W/Iliams, 4J2; Helena Val- 

 ley, 1883, Scr/biier^ 116. 



Yellowstone Park: 1885, Tiueedy, <5py; Yellowstone Falls, 

 Aug. 14, 1897, Rydberg & Bessey, j202. 



Artemisia cana Pursh, Fl. Am. Sept. 521 [Syn. Fl. i- : 375: Man. 



R. M. 203; 111. Fl. 3: 468]. 



Common on dry hills, etc., in the eastern and central parts of 

 Montana, up to an altitude of 2500 m. 



Montana: Bozeman, 1897,//. S. Jennings; Livingston, 1883, 

 Tzveedy, gj^: Park Co., 1887, Tweedy; Madison Co., 1887, j//; 

 Custer Co., 1892, 3frs. Light. 



Yellowstone Park : 1883, J//55 yJ/«ry Co nipt on: 1885, Tzveedy, 

 6go; Yellowstone Falls, Aug. 14, 1897, Rydberg d- Bessey, jigg; 

 Yellowstone Lake, Aug. 12,5^00; Yellowstone Lake, 1872, Coulter. 



