CATALOGUE. 273 



daged at both ends. — Twin Lakes, Colorado (J. Wolf), and generally on 

 the alpine summits of the Rocky Mountains and northward; also in 

 Europe 



Juncus castaneus, Smith — Stems from a creeping rhizoma, about a 

 span high, naked or with one or two leaves ; basal leaves shorter than the 

 stem, rather stout, channelled below, nearly terete upwards; single or few 

 large, few-flowered heads generally from a foliaceous sheath; deep brown 

 flowers ^' long; anthers half as long as filaments; prismatic capsules much 

 longer than flowers; seeds \", or with the appendages 1£" long. — Mosquito 

 Pass, Colorado, J. Wolf (933), and generally on the alpine heights of the 

 Eocky Mountains, to the northwest coast, and in similar regions of the Old 

 World. A very conspicuous form; flowers and seeds among the largest in 

 the genus. 



Juncus tenuis, Willd. — Throughout Colorado and New Mexico. — 

 Rothrock (45), in 1874. 



Juncus bufonius, Linn. — San Luis Valley, Colorado. 



Juncus longistylis, Torr. Bot. Mex. Bound. 223 ; Engelm. June. 

 453. — Csespitose, stoloniferous plants, with flat, grass-like leaves, erect 

 stems 1-2° high, bearing large, few-flowered heads, single or several in an 

 elongated, strict panicle ; flowers 2 £-3" long, with ovate-lanceolate, acute 

 sepals, of nearly equal length; anthers much longer than the filaments; 

 prismatic capsule obtuse, mucronate, about as long as sepals; seeds ovate, 

 abruptly pointed at both ends, striate-reticulate. — Rocky Mountains to 

 California; Twin Lakes and South Park, Colorado, Wolf; Santa Fe, Roth- 

 rock (1005), with fewer and larger heads, and Ash Creek, Arizona (308), 

 with smaller, few-flowered heads in a panicle 3-5' long. 



Juncus marginatus, Rostk. — Camp Lowell, Arizona, Rothrock (711), 

 the most western locality known for this species. A form with all the 

 sepals acute and aristulate. 



Juncus nodosus, Linn., var. megacephalus, Torr. — San Luis Valley, 

 Colorado, J. Wolf; Rothrock (174), from Zufii, New Mexico. 



Juncus Mertensious, Bong. — Stems csespitose, from a stout creeping 

 rhizoma, a span to a foot high, weak, compressed, leafy ; leaves compressed 

 from the sides, indistinctly cross-partitioned, mostly auricled at the sheaths; 

 18 BOT 



