140 Karl M. Wiegand and Arthur J, Eames 



7. J. dichotomus Ell., var. platyphyllus Wiegand. 

 Brackish meadows; rare. June-July IS. 



Salt flats e. of Montezuma village (A. J. E., K. M. IV., & L. F. Randolph). 

 Along the coast from Mass. to Tex., also in cent. N. Y. 



8. J. Dudleyi Wiegand. (/. tenuis, var., no. 946 of Cayuga Fl.) 



Open springy places in meadows and on hillsides, in strongly calcareous soils, also 

 on the moors of marl ponds ; locally common. June-July. 



Common in the McLean district, and from Paine Creek northw. to Conquest, and 

 at Junius ; frequent in the marl springs about the ravines ; rare or absent in the 

 chestnut soils of the hills s. of Ithaca. 



Newf. to Sask., the Rocky Mts., and Wash., southw. to Va., Tenn., Kans., and 

 Mex. ; rare or absent on the Atlantic Coastal Plain. 



Taller, stiff er, and more wiry than /. tenuis, with commonly smaller cymes and 

 larger flowers having more divaricate rigid perianth divisions. 



9. J. marginatus Rostk. 



Low sandy, or sandy and clayey, fields, in subacid soils ; frequent. July-Sept. 



South Hill Marsh (D. in C. U. Herb.!) ; along Fall Creek above Forest Home; 

 hillside s. of Brookton; hills n. of Caroline Center and in Richford; n. e. of Caroline; 

 two miles n. w. of Freeville; w. of Freeville (D.) ; w. of Benson Corners; s. end of 

 Bear Swamp, near Lansingville ; Waterloo. 



N. S. to Out. and Nebr., southw. to Fla., including the Coastal Plain. 



10. J. acuminatus Michx. (/. a., var legitimus, of Cayuga Fl.) 

 Ditches and low fields, in various soils; frequent. July-Aug. 15. 



Six Mile Creek ; Forest Home ; lake shore at Renwick ; Ellis Hollow ; Etna ; Free- 

 ville, near village and at Mud Creek ; along the railroad between McLean and Chicago 

 stations ; Montezuma ; and elsewhere. 



N. S. to Minn., southw. to Ga. and Tex., including the Coastal Plain. 



The heads are often replaced by galls which appear as bunches of reduced leaves. 



[J. debilis Gray. (/. acuminatus, var. debilis, of Cayuga Fl.) 



"Junius" (Herb. Sartwell, fide D.) ; not seen by the writers; occurrence in this 

 flora is doubtful.] 



11. J. nodosus L. 



Ditches, swales, and shores, in muddy or gravelly, more or less calcareous, soils; 

 common and widely distributed in the soils indicated. June 25-July. 



Newf. to B. C, southw. to Va., 111., and Nebr. ; rare or absent on the Atlantic 

 Coastal Plain. 



Dudley notes and describes a peculiar teratological form on Farley Point. 



12. J. Torreyi Coville. 



Low rich sandy nonacid soils ; scarce and local. July-Aug. 



Marsh along Spencer St. just s. of Ithaca; Wood River, Cayuga; n. w. of Spring 

 Lake ; and probably elsewhere. 



Mass. to Sask. and Wash., southw. to Ala., Tex., and Ariz. A plant of the non- 

 acid sands of the interior. 



13. J. articulatus L. 



Ditches and shores, in sandy or gravelly calcareous soils ; frequent. July. 



Six Mile Creek ; Fall Creek, above Forest Home ; Renwick ; Big Gully ; Utt, 

 Farley, and Howland Points ; shore n. of Cayuga Lake Park ; Tyre ; "on nearly all 

 the sandy points of Cayuga L. Rarely remote from the lake" (D.). 



Newf. to Mich, and B. C, southw. to Mass. and N. Y. ; rare on the Atlantic 

 Coastal Plain. Found also in Eurasia. 



