RHIZOCLONIUM. 145 



EHIZOCLONIUM FLUITANS, Kg. 



Caespitose, attached, bright green, filaments often long, 

 three feet or more, in rapid streams. Diameter 18-20 (-32) /A 

 articulations 1-1 2, rarely 2 times longer than wide; lateral 

 processes rather sparse, single or bicellular. 



Syn. EJiiso. laeustre, var. fluitans, Kg. ; RMzo. Kuetzingiamvni, 

 A. Br. 



Rapid streams, mill-dams, and the like, New Jersey. 

 Plate CXXI, figs. 26-28. Filaments of different sizes in- 

 termingle. The larger ones (32 /O much larger than the 

 European form, but probably the same species. The name 

 is appropriate, hence retained. 



EHIZOCLONIUM STAGNALE, Wolle. 



Dark green, large dense floating masses on stagnant 

 water ; primarily attached. Filaments more or less tortu- 

 ous ; many cells irregularly swollen, 25-30-33 ^ diameter ; 

 2-23-3 times as long as wide. Membrane firm ; cell contents 

 granular. 



Plate CXXII, figs. 8-10. 



EHIZOCLONIUM HOSFOKDII, Wolle. 



Vegetative green, robust ; diameter of filaments 36-40 //. 

 Cell walls thick ; articulations 3-4 more rarely 6 diameters. 

 Lateral rhizome-like processes, short, without divisions. 



Collected in Erie County, N. Y., by F. H. Hosford. 

 Plate CXXII, figs. 13-16, four parts of filaments. 



EHIZOCLONIUM CASPARYI, Harv. 



Yellowish green, often faded, stratified interwoven, curved 

 here and there, and angularly bent ; at the angles often 

 emitting short processes, root-like; articulations l]-li-2-3 

 times as long as wide. 



In brackish and salt water, California. 

 Plate CXXII, figs. 11, 12, processes omitted. 





 EHIZOCLONIUM SALINUM, (Schleich.) Kg. 



Pale or yellowish green, crispate, diameter of cells 20-25- 

 30 yw; length 1-1 i -2 diameters, after division; prior to 

 division 2-3-4 diameters ; filaments long, in loose or more 

 densely interwoven mats ; primarily attached, then floating 

 in submarine waters along the Atlantic Coast. 



