522 WlEGAND : JUXCUS TENUIS WlLLD. 



Oregon : Klamath Co. (E. I. Applegate, no. 748), Waldo 

 (Howell, 1884). 



Differs from Juncus tenuis in the larger, fuscous, congested 

 flowers with scarcely spreading perianth, more oval and firmer 

 capsule, stouter, taller stem with more numerous basal leaves, and 



J. confi 



It some- 



times becomes quite robust, in which case the inflorescence may 

 become more open. In general, this species is decidedly more 



/ 



J itnc us brachyphylhi 



larger, fuscous, more spreading perianth, much shorter retuse oval 

 capsule, which is only three fourths the length of the perianth, the 

 placentae not meeting at the axis, and the seeds not being quite so 

 long. It agrees with J % confnsus in having the same retuse apex 

 to the capsule and very scarious margins to the perianth seg- 

 ments, but the whole flower is much larger. 



11. Juncus tenuis Willd. Sp. PL 2: 214. 1799 



/. bicornis Michx. Fl. Bor. Am. 1: 191. 1803, 



Tufted, rather low, bright green : culms 2-6 dm. high, com- 

 monly spreading, slightly flattened and finely striate, often stout : 

 leaves long, one half to nearly the full length of the culm, narrow 

 (1-1.25 mm.), lax, flat and soft, rarely slightly involute ; sheaths 

 all blade -bearing, short, loose and often expanded, greenish-brown, 

 margins and the large extended auricles (often 1.5 mm. long) very 

 scarious : inflorescence pale green, many-flowered, moderately 

 open ( 1-7 cm, long), flowers somewhat aggregated near the ends 

 of the very unequal branches : bracts 2 rarely 3, foliaceous, much 

 exceeding the inflorescence : bracteoles triangular-ovate, acutish : 

 perianth variable in size (3-4.5 mm. long), parts all nearly similar 

 but the inner slightly shorter, lanceolate, very acute, green with 

 white-scarious margins, conspicuously spreading : stamens one 

 half the length of the perianth ; anthers short, oblong, much 

 shorter than the filament : capsule thin-walled, broadly ovoid, 

 shorter than the perianth, obtuse, very obscurely triangular above, 

 scarcely apiculate : placentae not reaching half way to the axis : 

 seeds (.33-.40 x .14-. 17 mm.) oblong, bluntly apiculate at each 

 end, reticulated, areoles large, transversely oblong. 



Dry roadsides and grassy places, Newfoundland to Florida and 



westward to Texas, northwestward to Oregon and Washington. 



Specimens examined : 



