MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 429 



Artemisia longifolia Nutt. Gen. 2 : 142 [Syn. Fl. i^ : 372 ; Man. R. 



M. 202]. 



Belongs rather to the plain region and is therefore found apparently 

 only in the eastern part of the state. 



Montana: Milk River, 1889, V. Havard; Snowy Mountains^ 

 1882, Can by. 



* Artemisia rhizomata A. Nelson, Bull. Torr. Bot. Club, Ja. 1900. 



A small species related to A. longifolia and A. gnaphaliodcs, char- 

 acterized by its small leaves, which are mostly entire or the lower 

 with 2-3 teeth or lobes, the long horizontal rootstock, a very fine 

 tomentum, small and slightly tomentose involucres and a panicle of 

 simple erect spikes. It grows in sandy soil, at an altitude of 1000- 

 2000 m. 



Montana : Hell Gate, i860. Dr. J. Cooper. 



Idaho : Henry Lake, Jul}- y^^ 1897, Rydberg & Bessey, j2ii. 



* Artemisia Purshiana Besser, Nouv. Mem. Soc. Nat. Mosc. 3: 59. 



This was included in A. Liidoviciana by Dr. Gray. As he has 

 characterized that plant, it includes not less than six species, 

 viz. : A. gnaphaliodcs Nutt., A. Ludoviciana Nutt., A. Purshiana 

 Bess., and the three following ones. The first two I have not 

 seen from Montana or the Park, although they may be found in the 

 eastern portion of the State. A. Purshiana has broad almost ovate 

 leaves, generally white on both sides, entire or quite often with a 

 few short triangular lobes, and comparatively large heads. It grows 

 at an altitude of 1000-2000 m. 



Montana: Rainbow Falls, 1885, R. S. Williams^ 24J ; Silver 

 Bow Co., Mrs. Jennie Moore; Musselshell River, 1896, Plod- 

 man, 88y; Lima, 1895, Rydberg, sg^jj.: Missouri River, 1883, 

 S crib tier, iij. 



* Artemisia latiloba (Nutt.); Artemisia Ludoviciana latiloba Nutt. 



Trans. Am. Phil. Soc. (II.) 7: 400; Torr. & Gray, Fl. N. 



Am. 2 : 420. 



This has broad leaves, with triangular or lanceolate acute diver- 

 gent lobes, in age more or less glabrate above, and comparatively 

 large tomentose heads in dense clusters. The leaves resemble those 

 of A. Tilesii and A. elatior, but the involucre is more tomentose. 

 Altitude about 2000 m. 



Montana: Madison Co., 1887, Tzveedy, 308 ; Park Co., 1887. 



