208 JUNCACE^). Juncus. 



16. J. longistylis, Torrey. Taller (a foot or two high); leaves much shorter 

 than the steins, the sheaths with distinct ligules : heads usually 5 to 9, in a short 

 sparingly branched panicle, exceeding the very short spathe, sometimes fewer or 

 solitary, few-flowered : perianth paler, the segments rather narrower and usually 

 more acuminate : seeds oblanceolate, brownish, much smaller, faintly ribbed. Eot. 

 Mex. Bound. 223 ; Engelm. 1. c. 453. 



Var. (?) latifolius, Engelm. 1. c. 496. Leaves short, broader (2 to 2| lines 

 broad), the sheaths without ligules : anthers more elongated. 



On the eastern side of the Sierra Nevada from Washington Territory to Arizona, New Mexico, 

 and the Saskatchewan ; Mono Lake (Bolander) ; Trnckee Valley, Bailey. The variety belongs to 

 the Sierra Nevada ; in the Yosemite Valley, at 4,000 feet altitude, and on the Upper Tuoliunne 

 at 10,000 feet (Bolander), and frequent on the eastern slope, Anderson. 



17. J. obtusatus, Engelm. 1. c. 495. Stems 6 inches high, from a creeping 

 rootstock, about equalling the narrow (a line broad) leaves : sheaths without ligules : 

 spathes much exceeding the inflorescence : heads few in a simple panicle or solitary, 

 few-flowered: perianth-segments shorter (1^ lines), greenish, the outer ovate and 

 acutish, the inner very obtuse, shorter than the oblong-ovate obtuse very shortly 

 apiculate capsule : seeds brownish, very small, ovate, obtuse, minutely reticulate. 



Near the Big Tree Grove, Mariposa County, in large tufts on the sandy banks of streamlets, 

 Bolander, 



* * * Stems leafy : leaves terete or laterally flattened, more or less distinctly 

 knotted by internal transverse partitions : flowers capitate : perennial. 



i Leaves terete or only sliyhtly compressed. 

 H- Stamens 3. 



18. J. supiniformis, Engelm. 1. c. 461. Early leaves elongated and capillary, 

 floating, pale green : stems low (2 to 4 inches), shorter than the erect subterete cauline 

 leaves : panicle simple, of 3 to 6 small heads, which are about 5-flowered : perianth- 

 segments brownish, narrowly lanceolate, acute, nerved, 1| or 2 lines long, shorter 

 than the oblong acutish stoutly beaked capsule : anthers oblong, shorter than the 

 filament : seeds obovate, rather large, apiculate at each end. 



In ponds near Mendociuo City (Bolander); Humboldt County, Kellogg & Harford, n. 1041, 

 1042. 



19. J. Bolanderi, Engelm. 1. c. 470. Stems slender, 2 feet high or more, about 

 equalling the subterete leaves : ligules of the sheaths conspicuous, sometimes elon- 

 gated and leaf-like : heads subglobose, usually 2 or 3, very many-flowered : perianth- 

 segments greenish brown, narrowly lanceolate and setaceously acuminate, 1^ lines 

 long, exceeding the clavate-oblong obtuse apiculate 1 -celled capsule : filaments several 

 times longer than the oblong-linear anthers : seeds very small, obovate. 



Found in swamps near Mendocino City (Bolander) and in Humboldt County Kellogg & Har- 

 ford, 11. 1052. 



H- Stamens 6. 



20. J. nodosus, Linn. Stems slender, from a very slender creeping tuberiferous 

 rootstock : leaves somewhat compressed, erect : heads few, 8 20-flowered, subglo- 

 bose : perianth-segments brownish, 1| to 2 lines long, lanceolate, acuminate, nearly 

 equalling the narrow acuminate capsule : anthers oblong, shorter than the filament : 

 seeds ovate, rather abruptly apiculate at each end, reticulate, brownish. Var. mega- 

 cephalus, Torr. Steins stout, 1 to 3 feet high : leaves thick, divergent : heads 

 larger and very many-flowered, on short stout peduncles or sessile ; panicle some- 

 times compound : perianth paler, about 2^ lines long, the segments very narrow and 

 setaceously acuminate. 



The typical form has not been collected in California or Oregon, though common eastward : the 

 variety was collected in California by Coulter, and is frequent in Oregon and the interior (Nevada, 

 Watson ; Arizona, Palmer), ranging to the Atlantic States. 



