154 RYDBERG: 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. Douglasii, 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. Douglasii 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. Douglasti 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. /onesiz. 
Cotorapo: Howe's Gulch, 1899, W. F. M.; Dolores (7300 
ft.), 1892, Crandall; lat. 39°-41°, 1862, Hall & Harbour, 2; 
Howe's Gulch, 1893, C. F. Baker; near Boulder, 1892, 4. AZ 
Patterson, 168 ; Dixon Cafion, 1891, /. H. Cowen, 368. 
Uran : Uinta Mountains, 1869, S. Watson, 7; American Fork, 
1880, MW. £. Jones, 1351. 
Wyominc : Headwater of Tongue River, Big Horn Mountains, 
°1898, Frank Tweedy, 171. 
v Clematis eriophora 
Perennial, from a woody caudex : stems and leaves prominently 
white-villous, the former 3-5 dm. high, simple: leaves 5—1° 
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 plumos¢- 
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. 
Cotorapo: Vicinity of Horsetooth, 1896, /. H. Cowen (tyPe 
in herb. N. Y. Bot. Garden ; cotypes in herb. State Agric. College, | 
Colo.); Foothills, Larimer county, 1893, C. S. Crandall ; Colorado, 
