254 JUNCACEAE 



(usually 2 to 6) -flowered in a short sparingly branched panicle, exceeding the 

 very short involucral bract; perianth pale, segments of equal length, narrow, 

 acuminate, broadly scarious-margined, 2 lines long ; styles long ; capsule equaling 

 the perianth, triangular ovate, obtuse, mucronate. 



Crest and eastern side of the Sierra Nevada from Mariposa Co. north. New 

 Mexico, Colorado and Nebraska north to Saskatchewan. 



Locs. Mono Lake, Bolander 6029; Kennedy Mdw., Tuolumne Co., A. L. Grant 125, 448a; 

 Sonora Pass, A. L. Grant 272; ne. Modoc Co., Manning 441. 



Eef. JUNCUS LONGISTYLIS Torr. Bot. Mex. Bound. 223 (1859), type loc. "Copper Mines," 

 New Mexico, Bigelow. 



19. J. latifolius Buch. (Fig. 42d, e.) Similar to J. longistylis ; leaves nar- 

 rowly linear-lanceolate, 2 to S 1 /^ lines broad, 2 to 5 inches long ; ligules absent ; 

 heads 6 to 10-flowered, in a loose simple few-headed panicle. 



Sierra Nevada from Tulare Co. north to Siskiyou Co. ; also Oregon and Wash- 

 ington. More ample material may show that this is better disposed as a variety 

 of J. longistylis. 



Locs. Yosemite Valley, Bolander 6035; Sonora Pass, A. L. Grant 272; Tallae, Jepson 

 8081; Pilgrim Creek, McCloud Flat, Gold-smith I; Medicine Lake, Goldsmith 30; Goosenest 

 foothills, Butler 872 (leaves very narrow). 



Eefs. JUNCUS LATIFOLIUS Buck Monogr. Juncae. 425 (1890). J. longistylis var. lati- 

 folws Engelm. Trans. St. Louis Acad. 496 (1868), based on spms. by Bolander from Yosemite 

 Valley (6035), upper Tuolumne Eiver, and east slope of the Sierra Nevada. J. orthophyllus 

 Cov. Contrib. U. S. Nat. Herb. 4:207 (1893). 



20. J. supiniformis Engelm. Early leaves elongated and capillary, floating, 

 pale green, 1 to 2 feet long; stems low, erect, terete, shorter than the subterete 

 cauline leaves ; panicle simple, its 3 to 6 small heads about 5-flowered ; perianth 

 segments brownish, narrowly lanceolate, acute, nerved, 1% to 2 lines long. 



In ponds, Mendocino and Humboldt cos. North to Washington. 



Ecolog. Note. "In spring these ponds [at Mendocino City] are completely covered with 

 the pale green capillary leaves of this species, 1 or 2 feet long. As the water recedes with the 

 advancing dry season, the erect flowering stems begin to form, and a little later the vestiges 

 of the decaye'd vernal leaves cover the remaining mud with grayish spiderweb-like filaments. ' '- 

 H. N. Bolander. 



Locs. Mendocino coastal plain, Bolander 4767b; Humboldt Co. (ace. Buchenau in Engler, 

 Pflzr. 436:174). 



Ref. JUNCUS SUPINIFORMIS Engelm. Trans. St. Louis Acad. 2:461 (1868), type loc. Mendo- 

 cino City, Bolander 4767. 



21. J. mertensianus Bong. (Fig. 42f, g.) Stems very slender, compressed, 

 from slender matted rootstocks, 3 to 6 (or 11) inches high; leaves very narrow, 

 rather flattened, less than 1 line wide, finely but obscurely ribbed by transverse 

 septa, the sheaths with ligules ; heads solitary, densely many-flowered, dark brown ; 

 perianth 1 to 1% lines long, the lanceolate narrowly acuminate segments equaling 

 the obtuse obovoid capsule; anthers usually shorter than the filaments; seeds 

 obliquely obovate, apiculate at apex, stipitate at base. 



Higher mountains, 4000 to 11,000 feet: San Bernardino Mts. ; Sierra Nevada 

 north to Modoc Co., thence west to Del Norte Co. North to Alaska and east to 

 Colorado. 



Locs. Mill Creek Falls, San Bernardino Mts., Parish 2522 ; Mt. Silliman, Ealph Sopping 

 425; Mono Pass, Bolander 6039; Herring Creek, Tuolumne Co., A. L. Grant 108; Heather 

 Lake, El Dorado Co., Jepson 8169; Sonora Pass, A. L. Grant 310, 418; ne. Modoc Co., Man- 

 ning 466; Ash Creek, Mt. Shasta, M. S. Baker; Lake Earle, Del Norte Co., Davy. Unalaska, 

 Jepson 92, 176. 



Eefs. JUNCUS MERTENSIANUS Bong. Mem. St. Petersb. ser. 6, 2:167 (1833), type loc. 

 Sitka, Alaska, Mertens; Buch. in Engler, Pflzr. 436;201, fig. 96 (1906). 



22. J. nevadensis Wats. (Fig. 43a-c.) Resembling slender forms of J. 

 phaeocephalus ; stems very slender, somewhat compressed, from a slender creeping 



