FRESH- WATER ALG.E OF THE UNITED STATES 223 



li. toiMilosa^ (KoTu) Ag. 



L. subsimplex, pleriimque arcuata, cartilaginea ct nonniliil rijrida, 1-2 polliccs loiisa; nodal is 

 approximatis, papillis applauatis, pleruraque 4-6 enormiter verticellatis, vel nonuiliil sparsis, 

 iuterdum nounihil coufluentibiis ; sporis ovalibus. 



Diam. — Sporis. transv. max. t^jits" — ts^tsis"- 



Syn. — L. torulosa (Roth) Ag. Rabenhorst, Flora: Europ. Algarura, Sect. III. p. 411. 



Eab. — 111 fluraine, Kentucky; (Short) Harvey. Pennsylvania; Virginia; New York; New 

 Jersey ; Wood. 



Subsimple, mostly arcuate, cartilaginous and somewhat rigid, 1-2 inches long; nodules ap- 

 proximate, with their papules applanatc, mostly 4-G, irregularly verticillate or somewhat 

 scattered, sometimes sliglitly confluent; spores oval. 



Remarhs. — This plant attains a length of about two inches, and grows in masses 

 attached to rocks, often forming a sort of turfy covering to them, in rapidly run- 

 ning water. In mass it has a grayish or blackish appearance. The filament has 

 a grayish groundwork, with a dark band at the position of the nodes, which are 

 enlarged and inclose the spores. The transverse outline of the filament is a very 

 irregular circle. I have found this species very abundant in the rapid water of the 

 Schuylkill, just above Flat Rock Tunnel, on the Reading Railroad, eight or nine 

 miles above Philadelphia. Prof. E. D. Cope has sent me specimens collected by 

 himself in swift streams in Western Virginia, and Mr. Austin has obtained it in 

 similar situations in Northern New Jersey, Mr. Austin has also sent me specimens 

 collected in Canada West. 



Li. fliiviatilis, Aa. 



L. simplex vel parce ramosa, quatuor uncias longa (interdum spitbamea?), recta vel subrccta ; 

 nodulis subremotis, papillis verticillatis niagnis obssesis; sporis globosis vel subellipticis. 



Z)mm.— Spor. tsoV— t^'oW- 



Syn. — L. fluviatilis, Agakdh. Rabenhorst, Flora Europ. Algarum, Sect. III. p. 411. 



Eah. — In rivulis, Alabama ; T. M. Peters. 



Simple or sparsely branched, 4 inches long (sometimes growing of a span length ?), straight or 

 nearly so ; nodules rather distant, papillte verticillate, large, prominent. 



Bemarlis. — The only specimens I have seen of this species were sent me by 

 Prof. Ravenel. This plalit is larger and heavier than L. torulosa, from which it is 

 also readily distinguislicd by its very large prominent papillae. These are in 

 slightly irregular whorls of three or more. The spores vary in shape from that 

 of a globe to that of a somewhat four-sided ellipse ; in the latter case being some- 

 times nearly twice as long as broad. Prof Rabenhorst speaks of the plant attain- 

 ing the length of a span. I have never seen it over four inches. 



L. catenata, Ktz. 



L. ad uncias 5 longa, regulariter constricta, simplex, compressa, arcnata, in massa obscure 

 violacea; papillis nullis; sporis enormiter ovalibus vel subglobosis. 



Diam — Spor. transv. max t^'o'ow" = -001". 



Syn. — L. catenata, KUtzing. Rabenhorst, Flora Europ. Algarum, Sec. III. p. 412. 



