ENGELMANN- NORTH AM. SPECIES OP JUNCUS. 435 



/?. Apiculati. 



23. J. tenuis, Willd. 



a. communis, all over the country. 



j3. secundus, Pennsylvania to New England. 



y. congestus, California. I g 



24. J. dichotomus, Ell., Dist. Columbia to Louisiana. 



25. J. Gerardi, Lois., eastern sea and lake coasts, and salines. 



b. Ramosi, caulophylli, diffusi. 



26. J. bufonius, Lin., all over the country. 



C. Glomeruliflori. 



* Hexandri (No. 30, 3-6- 

 andrus). 



27. J. repens, Michx., Maryland to Louisiana. 



28. J. falcatus, E. Mey., Pacific coast. 



29. J. longistylis, Torr., Rocky Mountains and north-westward. 



30. J. Buckleyi (J. filipendulus, Buckl.), Texas. 



** Triandri. 



31. J. marginatum, Rostk., Atlantic and central States to 



Texas. 



III. Junci articulati, caule folioso; foliis septis transversis inter- 

 cepts inde nodoso-articulatis. 



A. Articulati veri, foliis teretibus seu leviter (in No. 40 

 var. forte) tereti-compressis. 



a. Apiculati. 



1. Sub-singuliflori. 



32. J. pelocarpus, E. Mey. (J. Conradi, Tuck.), Newfound- 



land to South Carolina, and along the great Lakes. 

 /?. crassicaudex (J. abortivus, Chap.), Florida. 

 7(?). subtilis, Canada. 



2. Pauciflori (No. 37, var. <5, ad 



multifloros accedens). 



* Hexandri. 



33. J. articulatus, Lin., Northern New York & New England. 



34. J. alpinus, Vill. (J. pelocarpus, Gray), North-western 



New York to the Rocky Mountains and the Arctic re- 

 gions. 



35. J. militaris, Bigel., New England and southward. 



** Triandri. 



36. J. Elliottii, Chapm., N. Carolina to Florida & Alabama. 



37. J. pallescens, Lam. 



a. diftusissimus, Texas. 



fl. debilis (J. acuminatus, Mx.), middle and southern 



States east of the Mississippi. 

 y. robustus, Mississippi valley from Illinois to Louisiana. 

 6. jraternus (J. paradoxus, Mey.), Michigan and Mas- 

 sachusetts to the Rio Grande. 



