Jundus Co7}fusus, a Neiv Rush. 129 



Inflorescence somewhat congested, much exceeded by its 



lowest involucral bract /. confusus Coville. 



A plant of the Rocky Mountain region from Colorado 

 northward to Montana, Idaho, and Washington. 



Inflorescence not congested, the flowers secund on the some- 

 what incurved brandies, seldom exceeded bj' the lowest 



involucral bract /. secundus Beauv. 



A species of common occurrence in the coastal plain 

 from New Jersey to North Carolina and occasional in 

 Illinois and Missouri. 



Perianth 3.5 to 5.5 mm. long, green or stramineous, without 

 brown stripes along either side of the midrib (except in the 

 variety) ; capsule obovate, broadly rounded, though sometimes 



retuse, incompletely 3-celled J. tennis Willd. 



Occurring almost throughout North Amei'ica, especially as a 

 weed along roadsides and paths, and now migrating to all 

 parts of the world. Along the Pacific coast from middle 

 California to Vancouver Island occurs a robust variety with 

 congested inflorescence much exceeded, as is usually the 

 case also in the type form of the species, by the lowest in- 

 volucral bract; the perianth 4 to 5.5 mm. in length, about 

 one-half longer than the capsule ; its parts with a reddish 

 brown stripe along either side of the midrib. This plant is 

 here named Junctus tenuis occidentalis (,/. tenuis con- 

 gestus Engelm. Trans. St. Louis Acad. 2 : 450. 1866. Not 

 /. congestas Thuill. 1799). 



Leaf blade terete, channeled along the upper side. 

 Seed not caudate. 



Perianth 3.5 to 5 mm. long, not exceeded by the capsule. 



/. dichotomus Ell. 

 A species common to North and South America, occurring 

 abundantly in the United States along the coast from Texas 

 to New Jersey, and more rarely as far northward as Maine. 

 The plant is often confounded with /. tenais when not crit- 

 ically examined, but in addition to its leaf character it 

 may be distinguished also by its darker green color and its 

 fewer-ribbed (about 14 instead of 20 to 24) seeds. 



Perianth 2.5 to 3 mm. long, conspicuously exceeded by the cap- 

 sule /. greenei Oakes & Tuckerm. 



Occurring near the coast from New Jersey northward to New 

 Brunswick ; in Michigan, Wisconsin, and Minnesota; and 

 in the Canadian province of Ontario. The inflorescence 

 is usually short, much exceeded by the loM-est involucral 

 bract, and the exposed portions of the completely 3-celled 

 ovoid-lanceolate capsule are commonly brownish. The 

 seeds are commonly but erroneously described as caudate. 



