298 



JUNCACEAE 



Juncus 



Miles 

 ' ' '5(5 

 Map 617 



Juncus pelocarpus Mey. 



Jan. 

 Feb. 

 Mar. 



Apr. 



May 



June 



July 



Aug. 



Sept. 



Oct 



Nov 



Dec. 



Miles 



50 



Map 618 



Juncus nodosus L. 



of all the species with small spherical heads to which Coulter's statement 

 under J. scirpoides, "found throughout the state," is applicable. 

 N. Y. to Mich., southw. to Fla., Mo., and Tex. 



16. Juncus brachycarpus Engelm. Map 614. Fairly common in southern 

 Indiana ; frequent elsewhere except in the central and eastern counties. Its 

 favorite habitats are low fallow or grassy fields where the soil is usually a 

 hard white clay, and sandy ditches, but it occurs also on wet roadsides and 

 in flat woods and on the dunes in sloughs and sandy swales. 



Mass. to Ont., southw. to Ga., Miss., and Tex. 



17. Juncus acuminatum Michx. Map 615. Very common in ditches and 

 wet, usually more or less open, habitats of all types ; frequently in shallow 

 water in ponds or swamps. Occasionally the heads are proliferous, espe- 

 cially after the habitat has been flooded. 



N. S. to Minn., southw. to Ga. and Tex. 



18. Juncus nodatus Coville. (Juncus robustus (Engelm.) Coville, not 

 Wats.) Map 616. Infrequent and local. This southern species was 

 apparently first collected in the state at its northernmost known station: 

 along a wet railroad siding near Lake Maxinkuckee, Marshall County, 

 J. T. Scovell and H. W. Clark no. 1468, Oct. 16, 1900. Its usual habitat in 

 southern Indiana is on borders of ponds in low, often flooded, pin oak 

 woods where it is associated with buttonbush and with Car ex Crus-corvi 

 and C. lupuliformis. 



Northern Ind. to Kans., Okla., Tex., and La. 



19. Juncus pelocarpus E. Mey. Map 617. Fairly common in the north- 

 western counties, mostly in the dune area. A species of wet open habitats, 

 occurring on sandy or mucky borders of ponds, lakes, and swamps and in 

 sloughs and swales. The more diffuse proliferous plants are often entirely 

 sterile. 



Newf. to N. J., Ind., and Minn. 



20. Juncus nodosus L. Map 618. Fairly common in the northern 



