518 WlEGAND : JUNXUS TENUIS WlLLD. 



Specimens examined : 



N. Mexico : Copper Mines (Geo. Thurber, type in Gray 



Herb.); N. Mexico (A. Fendler, no. 856). 



Arizona: Apache Pass (Lemmon, no. 310). 



</ 



Juncus Arizonicus curtiflorus var. nov. 



Commonly more slender, sheaths frequently closer : leaves 

 nearly filiform : inflorescence smaller (3-5 cm. long) : flowers 



smaller, perianth only 4 mm. long, scarcely exceeding the broader 

 and shorter, more ovate capsule ; placentae more widely separated. 



Arizona, New Mexico and Texas. Possibly a distinct species. 



Specimens examined : 



Arizona: Flagstaff (D. T. MacDougal, no. 305, type in Gray 

 Herb.). 



New Mexico: (C. Wright, no. 1922). 



Texas: Houston (E, Hall, no. 661, 1872). 



Intermediate in some respects between Jitnms confusns andy. 

 tenuis ; differing from the former in its membranous auricles, larger 

 perianth, comparatively shorter capsule, open stramineous inflo- 

 rescence, and stouter habit ; and from the latter in its membranous 

 auricles, more oblong firm-walled capsule, scarcely spreading 

 perianth, and erect branches. It is one of the largest species of 

 this group. The tall stout culms are densely clothed at the base 

 with the numerous papery and very loose sheaths. Some of the 

 specimens differ markedly in their smaller flowers and other 

 characters, thus warranting their separation as a distinct variety as 

 above. 



7. Juncus Georgianus Coville, Bull. Torn Club, 22 : 44. 1895 



Densely tufted, 3 dm. high, erect, but somewhat weak, slender : 

 culms striate-grooved, nearly terete : leaves very numerous, rather 

 long (%-}4 length of culm), blade narrow, quite thick and rigid, 

 but flattish with a broad open groove, coarsely striate on the back ; 

 sheaths close except the lower which are bladeless and expanded, 

 all greenish-stramineous, margins membranous, auricles short, 

 rounded, membranous, or slightly cartilaginous in some cases, not 

 scarious : inflorescence large for the plant (6-10 cm. long), very 

 lax and distantly flowered : bracts filiform, equaling the inflores- 

 cence or usually much shorter : bracteoles ovate, acute : perianth 



4.5 



very 



midrib green with a fuscous stripe on each side and a narrow 



