130 University of California Publications in Botany [Vol. 9 



Stems leafy; inflorescence terminal. 



Leaves not nodulose, flat and grass-like, neither equitant nor ligulate; 

 flowers capitate or clustered. 



Stems low, mostly equalling the leaves or shorter 4. J. obtusatus 



Stems taller, exceeding the leaves 5. J. orthophyllus 



Leaves nodulose, compressed or flattened laterally and equitant, ligulate. 

 Leaves lightly compressed, subterete, without auricles and very narrow; 



stems %-2 feet high, very slender; heads usually many 



6. J. nevadensis 



Leaves obviously flattened laterally and equitant, auricled. 



Perianth segments pale and scarious, often obtuse; heads 1 or 2. 



7. J. chlorocephalus 



Perianth segments dark brown or purplish and usually acute. 



Heads solitary, many flowered; stamens 6 8. J. Mertensianus 



Heads 5 or 3, fewer flowered;' stamens 3 9. J. ensifolius 



1. Juncus triformis var. uniflorus Engelm., Trans. St. Louis 



Acad., vol. 2, p. 493. 1868. 

 J. uncialis Greene, Pitt., vol. 2, p. 105. 1890. 



Type locality. — "Sierra Nevada among mosses." 



Range. — Washington to southern California, east to eastern 

 Nevada. 



Zone. — Transition and Canadian. 



Specimens examined. — Near Camp Agassiz above Fallen Leaf 

 Lake, Tahoe, 6,700 feet. Smiley 363a ; Tuolumne meadows, sandy 

 places on the meadows, 8,500 feet, Smiley 739 ; Upper Tuolumne, 

 Bolander. 



Parish identifies Reed 2481'-'* from Lake Surprise, 9,000 feet, San 

 Jacinto Mountains, as of this species; this is the present known south- 

 ern limit of its range. 



J. uncialis Greene was described from "Low moist places in fields 

 near Suisun, California." 



2. Juncus Drummondii E. Meyer, in Ledeb., Fl. Ross., vol. 4, p. 



235. 1853. 



J. subtriflorus (Mey.) Coville, Contr. Nat. Herb., vol. 4, p. 208. 1893. 

 J. compressus var. subtriflorus Meyer, Linnaea, vol. 3, p. 368. 1828. 



Type locality. — ' ' Unalaschka. ' ' 



Range. — Alaska to California and New Mexico. Eurasia. 



Zone. — Hudsonian and Arctic-alpine. 



Specimens examined. — Tamarack trail, meadow at 8,400 feet, 

 Tahoe, Smiley 260; above Donner Pass, 7,500 feet, Heller 7134; Dana 

 Fork meadows, Yosemite, 9,750 feet, Smiley 848 ; Mono trail, 9-10,000 

 feet, Bolander, Augu.st, 1866; Bloody Caiion, Mono County, 9,500 feet, 

 R. A. Ware 27.16c ; Shuteye Mountain, Madera County, on a north 

 facing slope, 8,100 feet, Smiley 568 ; same locality, rocks on north 

 side of peak in granite, 8,000 feet, J. IMurdoeh 2561 ; slope above 



