Juncus 



JUNCACEAE 



299 



o To 



Map 620 



Juncus articulatus L. 



50 



Map 621 

 Juncus alpinus Vill. 

 var. rarif lorus Hartm. 



counties and known from a single locality in Wayne County. It is found 

 in a variety of wet habitats : in marshes, bogs, and swales, occasionally in 

 ditches and sloughs, but most commonly on low sandy or marly shores. 



No specimens were found to support Schneck's report from the Lower 

 Wabash Valley. 



The relatively huge grotesque heads often produced by galls in many 

 species of § Septati occur with greatest frequency in this species, although 

 they are frequent too in J. Torreyi, J. canadensis and J. acuminatum. 



Newf. to B. C, southw. to Va., 111., and Nebr. 



21. Juncus Torreyi Coville. {Juncus nodosus var. megacephalus Torr.) 

 Map 619. Common, especially in the lake area, in ditches, sloughs, and low 

 prairies and on the borders of lakes, ponds, and creeks. It grows in both 

 clay and sandy soils. 



Mass. to Sask. and Wash., southw. to Ala., Tex., and Ariz. 



22. Juncus articulatus L. Map 620. Known in Indiana from a single 

 collection : on an abandoned road through a marsh on the southeast side 

 of Lake Wawasee, Kosciusko County, Deam no. 56408, July 19, 1935. 

 Here it was abundant in 1935. 



Specimens could not be located to corroborate the reports from Lake 

 County made by Coulter, Deam, Peattie, and Pepoon. 



Newf. to Ind. and B. C, southw. to Mass. and N. Y. ; local in n. Calif.; 

 also in Eurasia. 



23. Juncus alpinus Vill. var. rariflorus Hartm. (Rhodora 35: 233. 

 1933.) (Juncus alpinus var. insignis Fries and Juncus Richardsonianus 

 Schultes.) Map 621. Largely confined to the dune area in Indiana where 

 it is often locally plentiful on wet sandy or marshy shores of lakes and 

 ponds, on borders of sloughs, and in low sandy ditches. 



Que. to B. C, southw. to Pa., Ind., Nebr., and Wash. ; also in Eurasia. 



23a. Juncus alpinus var. fuscescens Fern. Map 621a. A single In- 

 diana collection (Bebb no. 663, Clarke Junction, Lake County, Aug. 14, 



