274 BOTANY. 



heads few, rather large, deep brown or blackish; flowers about, 2" long, 

 outer sepals acute, inner mostly shorter and obtuse, mucronate, rarely 

 similar to the outer ones ; stamens 6, or sometimes 3 ; filaments as long as 

 anthers, or longer ; ovary and capsule obovate, obtuse, abruptly pointed 

 by the short style ; seeds obovate, short-tailed at both ends. — Highest 

 mountains of Colorado; Mosquito Pass; Twin Lakes, Wolf; and north- 

 westward to Alaska. 



Juncus xiphioides, E. Meyer, var. montanus, Engelm. June. 1. c. 

 481. — Stems flattened, £-l£° high, with laterally compressed, slightly cross- 

 partitioned leaves, mostly auriculate at sheaths ; heads few, many-flowered, 

 light or darker brown ; flowers smaller than in the last ; all sepals acute, 

 inner ones shorter ; stamens 6 ; capsule oval, rostrate, about as long as 

 sepals ; seeds oblanceolate, and pointed at both ends. 



Sierra Blanca, Arizona, Rothrock (808), at 12,000 feet altitude, and 

 through the Rocky Mountains to California and Oregon. Our specimens 

 show only 1-3 heads, but at Zuni, New Mexico, Dr. Rothrock collected a 

 form (170) over 2° high, with few- (3-5-) flowered heads in compound 

 panicles; sepals very acute, of equal length; anthers half as long as filaments; 

 capsule (immature) rostrate. This form seems to stand near the original 

 type from the Pacific coast, or to form a transition from it to J. oxy metis. 



COMMELYNE^. 



Tradescantia Vieginica, L. — The narrow-leaved forms (372, 118), 

 New Mexico; also Camp Grant, Arizona. 



CYPERACE^E. 



Cyperus Nuttallii, Torr. — A small form, with three stamens and three 

 stigmas. — Sanoita Valley, Southern Arizona (599). 



Cyperus inflexus, Muhl. — San Luis Valley, Colorado (979), and 

 Southern Arizona (600 a, 602, 369). 



Cyperus Schweinitzii, Torr. — Colorado ; also Willow Spring, Arizona, 

 at 7,500 feet elevation. 



Cyperus cephalanthus, Torr. — Culm sharply 3-angled ; angles decid- 

 edly rough ; sides hispidly pubescent ; leaves shorter than the stem, rough- 



