294 



JUNCACEAE 



Juncus 



Q— — 53 



Map 605a 

 Juncus macer 

 f. Will lamsii (Fern.) Hermann 



5. Juncus Greenei Oakes & Tuckerm. Map 603. Infrequent in the north- 

 western counties in sandy soil along low roadsides, in moist depressions on 

 the dunes, and especially in prairie habitats along railroads. 



Maine to Vt. and N. J. ; locally in the Great Lakes region. 



6. Juncus secundus Beauv. Map 604. Known in Indiana from a single 

 collection : wet clay border of a cattail pond in a fallow field 3 miles east 

 of Livonia, Washington County, June 17, 1935, F. J. Hermann no. 6705. 

 It has been reported from Putnam County by Wilson but no specimen 

 could be found to substantiate the report. 



Maine to Vt. and N. C, and in the Mississippi Valley from Tenn. to 111. 

 and Mo. 



7. Juncus macer S. F. Gray. (Jour. Bot. 68: 367. 1930.) (Juncus tenuis 

 of authors, not Willd. ; including Juncus monostichus Bartlett.) Map 605. 

 Very common in fields, pastures, ditches, open woods, waste places, and 

 especially in paths and on roadsides ; infrequent on banks of streams and 

 in swampy habitats. 



Juncus monostichus (originally described from Madison County) is a 

 pathologic phase of this species in which the peculiar form of the inflores- 

 cence, the shortening of the capsules, and the tendency toward sterility 

 are induced by a fungus infection. 



Deam no. 55051 is exceptional in having the auricles scarcely prolonged, 

 the inflorescence much congested and perianth unusually large. Inter- 

 mediates between the species and its forms are frequent; thus Deam nos. 

 44784 and 53949, Peattie no. 2102, Lansing no. 2730, and Bechtel no. 13381 

 approach f. Williamsii; Deam no. 25456 approaches f. anthelatus; and 

 Deam no. 24 approaches f. discretiflorus. 



Almost throughout North America ; adventive in Europe, South America, 

 and Australia. 



7a. Juncus macer f. Williamsii (Fern.) Hermann. (Rhodora 40: 82. 

 1938.) (Juncus tenuis var. Williamsii Fern, and Juncus macer var. 



