128 Coville — Jiincius Confusus, a Neiv Rush. 



Other specimens beside the t3'pe have been examined as fol- 

 lows : 



Colorado: Grand Lake, George Vasey, 1868, No. 576. 



Wyoming: Sherman, altitude 8,000 feet, G. W. Letterman, July 28, 

 1884. 

 Big Horn Mountains, B. C. Buffum, August 6, 1892. 

 Claries Fork Valley, J. N. Rose, September 3, 1893, No. 530. 

 Steamboat Point, Yellowstone Lake, Robert Adams, August 19, 

 1871. 

 Montana: Spanish Creek, P. A. Rydberg, July 11, 1896, No. 3058. 

 In a meadow, Spanish Basin, altitude 1,800 meters, P. A. Ryd- 

 berg, July 17, 1896, No. 3116. 

 In a wet meadow, Blackhawk, P. A. Rydl)erg, August 5, 1896, 

 No. 3282. 

 Idaho : In the vicinity of Forest and about Lake Waha, Nez Perces 

 County, Mr. and Mrs. A. A. Heller, June 25, 1896, No. 3319, and 

 July 16, 1896, No. 3446. 

 Washington : Near Spangle, Spokane County, W. N. Suksdorf, June 

 30, 1884, No. 1042. 



Juncus confusus is one of seven closely related species, all of 

 which with the exception of /. tenuis occur only in America and 

 with the additional exception of /. dichotomus only in North 

 America. Juncus tenuis was formerly a very rare plant in Eu- 

 rope, but is now becoming widely disseminated there and in 

 nearly all parts of the world, apparently by introduction from 

 America. The following synopsis will be useful in distinguish- 

 ing the species of the group : 



Synopsis of Juncus tenuis and its Allies. 



Leaf blade flat, but sometimes involute in drying. 



Anthers much longer than their filaments /. geonytanus Coville. 



A densely tufted plant, with long leaves, reaching the unusually 

 large inflorescence ; brown-striped perianth 4 to 6 mm. long ; and 

 narrowly oblong-lanceolate completely 3-celled capsule. This 

 species is known only from Georgia, where it occurs on Stone 

 INIountain and adjacent knobs of similar geological structure. 

 For full description see Bull. Torr. Club, 22 : 44. 1895. 



Anthers not exceeding their filaments. 



Perianth 2.5 to 4 mm. long, usually with some reddish or brownish 

 coloration, equaling the completely 3-celled capsule; apex of 

 the capsule distinctly tri(j[uetrous, truncate or refuse. 



