629 Rydberg : Studies on the Rocky Mountain Flora 



4. Balsamorrhiza Careyana a. Gray, PI. Fendl. 81. 1849 

 This species grows on sandy plains of Idaho and Washington. 



5. Balsamorrhiza incana Nutt. Trans. Am. Phil. Soc. II. 7: 



350. 1840 

 Balsamorrliiza Hookcri var. incana A. Gray, Syn. Fl. 2' : 266. 



1884. 



This species grows on dry stony hills, up to an altitude of 2500 

 m., from Montana and Washington to California and Wyoming. 



6. Balsamorrhiza floccosa sp. nov. 



Balsamorrhiza Balsamorrhiza Rydb. Mem. N. Y. Bot. Garden, 

 I : 417. 1900. Not Heliopsis Balsamorrhiza Hook. 



A loosely w^hite or gray-tomentose perennial with very thick 

 tap-root. Leaves mostly basal, floccose on both sides, 2-3 dm. 

 long, regularly pinnately divided to near the midrib : some some- 

 times only coarsely toothed : segments lanceolate, acute, 3-5 cm. 

 long coarsely toothed : stem-leaves 2, near the base, similar but 

 smaller, about i dm. long : stem scapiform, 3-5 dm. high, villous 

 or the upper portion densely floccose : involucre about 3 cm. 

 broad, densely floccose ; bracts numerous in several series, lanceo- 

 late ; the outer often spreading with recurved tips ; rays 3-4 cm. 

 long, about i cm. wide ; achenes glabrous, cuneate oblong, with 

 truncate apex. 



This species has been mistaken for B. Balsamorrhiza (Hook.) 

 Heller or B. Hookeri Nutt., but the latter has much finer dissected 

 leaves and its pubescence is quite different. The latter is very 

 short and appressed, never consisting of long villous hairs, and 

 there is never dense wool at the base of the head as in this species. 

 B. Balsamorrhiza ranges from Washington to California ; but is 

 evidently not found in the Rocky Mountain region. All that I 

 have seen from the region and referred to B. Balsamorrhiza by 

 Heller, Holzinger and myself belong to B. floccosa. Those col- 

 lected by Parry, and if I am not mistaken, named by Gray, be- 

 long; to B. incana. 



B. floccosa grows on hillsides at an altitude of 1000-2500 m. 

 The following specimens are in the New York herbaria : 



Montana : Spanish Basin, Gallatin Co., 1897, Rydberg & Bcs- 



so', 5175 (type). 



Idaho : Lake Waha, 1896, A. A. & E. Gcrtrndc Heller, 3298 ; 



