400 Rvdberg : Rocky Mountain flora 



This species is most nearly related to J. ncvadensis,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. 



Colorado: Meadow Height, 1898, Shear & Bessey, 4323 

 (type); Elk River, Routt County, 1894, C. S. Crandall. 



Wyoming : Copperton, 1901, F. Tweedy, 4333 ; North Fork of 

 Clear Creek, Big Horn Mountains, 1898, T. A. Williams ; Grand 

 Encampment Creek, 1897, Aven Nelson, 3981. 



Juncus brunnescens sp. nov. 



Juiicus xipJiioides montanus Engelm. Trans. Acad. Sci. Sf 

 Louis, 2: 481 (in part). 1868. 



Stem 4-6 dm. high, flattened laterally and more or less 

 winged; leaves 1-2.5 dm. l° n g> 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- 

 fiowered ; 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. J. brunnescens grows in wet places in the 

 mountains of Colorado, New Mexico and Arizona, while J. saxi- 

 montanus ranges from Alberta and British Columbia to Colorado 

 and California. 



Colorado: Pago'sa Springs, 1899, C. F. Faker, 243 (type). 



New Mexico : Bear Mountain and Mangus Springs, Rusby, 417 

 C, 417 D and 417 F. 



Arizona: Flagstaff, 1898, MacDougal, 304 ; San Pedro Val- 



