u8 Muhlenbergia, Volume 6 



5. JUNCUS EFFUSUS Linn. Sp. PI. 325. 1753. 



Growing in robust clumps, in marshy ground, and on the 

 borders of streams, in the Cismontane region, and ascending the 

 mountains to 5500 feet altitude. 



San Bernardino Valley, Parish. Fredalba Park, San Ber- 

 nardino mountains, Miss Pettibone, and Abrams 2797. Straw- 

 berry peak, San Bernardino mountains, July, 1901, Abrams 

 1999. Strawberry Valley, San Jacinto mountains, July, 1901, 

 Hall 2360. Cuyamaca mountains, July, 1875, Palmer. Santa 

 Ysabel, June, 1903, Abrams 37S3. 



6. JUNCUS PARRYI Engelm. Trans. St. Louis Acad. 2: 447. 

 1866. 

 Summit of San Gorgonio (Grayback) peak, 11485 feet alti- 

 tude, August, 1905, Mrs. C. M. Wilder. The southern limit 

 of the species in the Sierra Nevada. 



7. JUNCUS BALTICUS Willd. Berlin Mag. 3: 298. 1809. 



An exceedingly variable species, of which a number of va- 

 rieties have been described, and to these several proposed spe- 

 cies have been reduced, among them J. mexicanus Willd. This 

 is defined as having strongly compressed and usually contorted 

 stems, and scape-like leaf-blades more or less constantly pro- 

 duced fioin the uppermost basal sheaths. These characters, un- 

 certain of themselves, do not stand the lest of field study. There 

 are leafless plants with stems either compressed or terete, and 

 the same is the case with others which have leaves. Again, the 

 same rootstock may produce both terete and compressed stems, 

 which may have cataphyl'a either blade bearing or muticous. 

 Leafless plants are usually more abundant than leafy ones, but 

 commonly both forms may be found together. In studying an 

 area covered with these two tonus, growing thus intermingled, 

 it is difficult to consider them as even valid varieties. But in 

 default oi any satisfactory treatment of the species as a whole, 

 and the most recent, that of Buchenau in Das Pflanzenreich cer- 

 tainly cannot be so considered, it seems best to keep up, in a 

 paj.er such as this, the distinction, artificial as it is. I have, 

 therefore, referred to the species such specimens as are entirely 



