154 RvDBERG : Studies on the 



ding : calyx campanulate, brown, more or less villous, especially 

 near the margins; sepals 2-2.5 cm. long, ovate, acute or acumi- 

 nate, upper half with a wavy dilated margin : achenes about 5 mm. 

 long and 4 mm. wide, flattish, densely silky; tails of the achenes 

 4—5 cm. long, beautifully plumose throughout. 



This is nearest related to C. Dovglasii, with which it has been 

 confused. It differs from that species in the dilated margins of 

 the sepals, the distinctly petioled and less compound leaves. In 

 the true C. Doiiglasii the upper and middle leaves are twice pin- 

 nately divided and subsessile, so that they with the first pair of 

 primary divisions look as if verticillate. Kuntze's description of 

 C. Doiiglasii var. Jonesii is so meager that nobody could know 

 from it what he meant, but fortunately we have one of Jones' 

 specimens. The following specimens belong to C. Jonesii. 



Colorado: Howe's Gulch, 1899, W. F. M.; Dolores (7300 

 ft.), 1892, Crandall ; lat. 39°-4i°, 1862, Hall & Harbour, 2; 

 Howe's Gulch, 1893, C. F. Baker; near Boulder, 1892, H. M. 

 Patterson, 168 ; Dixon Canon, 1891,^. H. Cozuen, j68. 



Utah : Uinta Mountains, 1869, 5. Watson, i ; American Fork, 

 1880, M. E.Jones, 135 1. 



Wyoming : Headwater of Tongue River, Big Horn Mountains, 

 1898, Frank Tweedy, lyi. 



Clematis eriophora 



Perennial, from a woody caudex : stems and leaves prominently 

 white-villous, the former 3-5 dm. high, simple : leaves 5-10 

 cm. long, distinctly petioled, twice pinnately divided ; ultimate 

 segments narrowly linear, 1—3 cm. long, 1—2 mm. wide: flowers 

 nodding ; calyx villous, campanulate, about 3 cm. long ; sepals 

 oblong, obtuse, the upper third spreading, with a dilated margin : 

 achenes oblong, about 6 mm. long and 3 mm. wide, silky, with a 

 blunt ridge on each side ; tails about 4 cm., beautifully plumose. 



This is closely related to the preceding and to C. Bakeri, but 

 differs from the former in the narrower leaf-segments, the obtuse 

 and thicker sepals and the denser and more persistent pubescence, 

 and from the latter in the longer leaf segments and the obtuse 

 dilated sepals. It grows at an altitude of 1500—2000 m. 



Colorado: Vicinity of Horsetooth, 1896,/. H. Coiven (type 

 in herb. N. Y. Bot. Garden ; cotypes in herb. State Agric. College, 

 Colo.); Foothills, Larimer county, 1893, C. S. Crandall ; Colorado, 



