524 Wiegaxd : Juncus TENUIS Willd. 



Massachusetts : Lexington (C. H. Knowlton). 

 Virginia : Carroll Co. (Small). 

 South Carolina : (M. A. Curtis). 

 Texas: Houston (E. Hall, no. 663). 

 Missouri : Butler Co. (H. Eggert). 



This is much more common and more widely distributed than 

 any other species in the group, being especially abundant through- 

 out the eastern United States. Although Willdenow's type has 

 not been studied there seems little doubt from the locality and 

 description given that it really was of this species. The more dif- 

 fuse habit, scarious auricles, many-flowered inflorescence with 

 flowers mostly near the ends of the branches, spreading sepals, and 

 thin- walled one-celled capsule makey. tenuis a very distinct species 

 indeed. It is, however, very variable and future study may sepa- 

 rate several more good species. In Washington and Oregon the 

 perianth shows a tendency to become fuscous, although never so 



Juncus occidentalis and J. confi 



I 



fl* 



-11. Juncus Dudleyi sp. nov. 



Pale green : stems tufted, often very large and stout, 3"~ 10 ^ rn# 

 high, stiff, erect and wiry, prominently striate-grooved : leaves 

 short, one half the length of the culm or usually less, narrow but 

 flat, frequently involute ; sheaths rather close, all blade-bearing, 

 margins not scarious, auricles rounded, thick and cartilaginous, 

 yellowish or reddish in color : inflorescence small and rather dense 

 2-5 (rarely 7) cm. long, few-flowered, exceeded by the short fili- 

 form 4-8 cm. long bract : flowers contiguous at the ends of each 

 branchlet, not at all secund, green or pale-stramineous ; bracteoles 

 ovate, obtuse or acutish ; perianth 4-5 mm. long, the parts firm, 

 nearly equal, lance-subulate, acute, strongly spreading, yellowish- 

 green with a distinct scarious margin : stamens one half as long as 

 the perianth, anthers oblong, slightly shorter than the filaments : 

 style very short : capsule broadly ovate-oval, }£—j4 the length of 

 the perianth, rounded apiculate and very obscurely triangular at 

 the apex, placentae reaching half way to the axis : seeds oblong 

 37-45 x.i 7-. 2 1 mm.), apiculate at each end, coarsely areolate 

 with 5-7 rows of transversely oblong areoles. 



Damp soil in open places, from Maine and New York west- 

 ward to the Saskatchewan, Colorado and Arizona. 



