400 RypBERG: Rocky MouNTAIN FLORA 
This species is most nearly related to /. xevadensis, J. Mertensianus 
and /. Richardsonianus, with which three it has been confused. It 
differs from the first in the truncate capsule, from the second in 
the paniculate inflorescence and not caudate seeds, and from the 
last in the dark acuminate petals and sepals and the short capsule. 
It grows in wet meadows at an altitude of 1800-2700 m. 
CoLorapo: Meadow Height, 1898, Shear & Bessey, 4323 
{type); Elk River, Routt County, 1894, C. S. Crandall. 
- Wyomine: Copperton, 1901, F. Tweedy, 4335; North Fork of 
Clear Creek, Big Horn Mountains, 1898, 7. A. Williams ; Grand 
Encampment Creek, 1897, Aven Nelson, 3981. 
v Juncus brunnescens sp. nov. 
Juncus xiphioides montanus Engelm. Trans. Acad. Sci. St 
Louis, 2: 481 (in part). 1868. 
Stem 4-6 dm. high, flattened laterally and more or less 
winged ; leaves 1-2.5 dm. long, 2-5 mm. wide, equitant, laterally 
flattened, long-attenuate, septate ; sheaths with scarious margins, 
abruptly contracted above, but scarcely auricled; bract linear- 
lanceolate, 2-5 cm. long, green; panicle open, 5-10 cm. long, 
with from 10-60 small heads ; bractlets ovate-lanceolate or ovate, 
abruptly acuminate, scarious and light brown; heads 5-12- 
flowered ; petals and sepals subequal, lanceolate, acuminate, about 
3 mm. long, light brown with green midrib; stamens usually 6, 
sometimes 4 or 5 ; style about equaling the petals ; capsule lance- 
ovoid acute. 
This was included in /. xiphioides montanus by Engelmann, 
but the first specimen cited by him belongs to a distinct plant with 
few, large, dark brown heads. This has received the name /. 
saximontanus by Aven Nelson. Besides the character mentioned, 
the scarious margins of the leaf-sheaths in the latter nearly always 
end in small auricles, a character by which it differs from all the 
species of the group. //. drunnescens grows in wet places in the 
mountains of Colorado, New Mexico and Arizona, while /. 544 
montanus ranges from Alberta and British Columbia to Colorado 
and California. 
Cotorapo: Pagosa Springs, 1899, C. F. Baker, 245 (type): 
New Mexico: Bear Mountain and Mangus Springs, Rusby, 447 
C, 417 Dand 417 F. 
Arizona: Flagstaff, 1898, MacDougal, 304; San Pedro Val- 
