Fi: i-:> ii \\.\r 1:1: AI.(,.I: 01 fHi. i MTI:D STATES. 



8. Mtllll. I -Illll \\. ".(.. (-p. MOT.) 



8. iiiini. I-MIIII i inn ul^'i- uii-r:- ji.t. ruiixiiim i-t pluiituH at|iiutiru* uillm-ri in- ; 1 1 irln>niutiI)U 

 vliiiiKulis ; p.-<-inl<.r.ii(iuli* plus minus -ii-tanul-u-, plrrumi|uu )< uniii*, et e bai divi-rgenirr 

 -!- ii-ii-idii-ii-. brrtilm.1 uui i-l.-njr.iii-; irirliomuiilmn iiiU-rui la-tc Kfugiueii, intcrtlum dis- 

 tiiutc uiti< uiuti-. inti niuiu iuurtieul.. ..l.iu.-r r.-tumlato, wrngineo; artii-ulis diaiuetro 



subu'<|inililius vd brevioribus ; vu^iui.s amplis, livulinis, colons cxpcrtibun ; ccllulis pordu- 

 rantiliur; ilJAtinctis, >ii:^rui;-. iuu-rji-i'tia, >ul -\ limlrii -i.-, diuuii-tru inurduui fi-rc duplo breviuri- 

 bu.-, iiitcrdum duplo longinribuH. 



vag. If 8 OB " .000416". Cum tag. T1 J e ," - .00075". 

 Hub. Iii aquis i|uii-ii.-i, Cumberland County, New Jersey. 



S. iiiiiiirrscd, intrriiiixcd with other algse and adhering to aquatic plants; filaments elongate ; 

 l-nujrlirs IK- -.-I I \ griiiiiiuti', more or leas distant, short or elongate; internal filaments bright 

 a-ruprmuri, HonietinivH ili.-tinrtly articulate, at others not so, apex obtusely rounded wrugiuoun ; 

 j--:iit.>i ul-out ri|ii:ii i.i tin- tliuiKi-UT r i-liort<T ; slii-iilli ample hyaline, col<-rl<- ; lii-UTocyBU 

 di-tim -t. single, iiiti-rjiTii-d, subcylindrical, souu-tiuies about half aa long an broad, sometimes 

 nearly twice aa long. 



/,'' ni ,-!.-*. 1 found this jiliint in September, 1869, in Shepherd's Mill Pond, near 

 1 nwirh, Ciinilx-rliind County, New Jersey, forming, with other algsr, a floccu- 

 Icnt, ^n < ni-li-l>la( k, slimy coating to the stems and finely dissected leaves of 

 A 1 .//,*///' (//(/.- (HjiiiitiliK. 'Ihr liranches are very few in number in most specimens, 

 and when they are more plentiful are apt to be short and abortive. Their apices 

 do not dinvr mat* rially from their other portions. 



:. !, pi. '2rt, rejin-M-nts a portion of a filament of this specimen magnified 750 

 diameters; ti^. '2 b a whole filament magnified 260 diameters. 



*. Airjrclii, KTZ. (?) 



8. owptoso-floccosnm, bryophilnm, nigro-viride; trichomatibus, plerumqne sparse pseudora- 

 iii- .>!-, pseudoraniulisque elongatis et intricatis ; trichoinatibns internis brevitcr articulatia, stepc 

 intrrriiptis. fa-pe uonnihil nioiiiliforinilius, viridibus aut in Ktate provecta brunneia; articulia 

 saepe sejunctia, diametro pleramque brevioribas, subtilitcr granulatis ; psendoramulis plcrumque 

 singulis ; vaginis modice arctis, intcrdum subatnplis, baud disliiu-te lamellosis, niodicc crassis, 

 hyalinis, coloris expertibos aut in sstate proveeta dilute fusco-brunncis; ccllulis |>erdnranti- 

 IHIS nonnihil reniformibus, plerumqao niilliH, basilaribus. 



Diam. Fil. cam vag. plerumquc TI 5 off " max. to ' ffo " ; sine vag. TS oro". ''''" P<-r<lurant. lab. 

 " ' 



,Si/n. S.Nseyelii (KTZ.), RABENHORST, Flora Europ. Algarum, Sect. II. p. 252. 

 Hab. In fonte, prope Belvidcre, Centre County, Pennsylvania. 



Growing in small, blackish-green woolly mats attached to mosses ; filaments mostly sparsely 

 branched, with the branches elongate and intricate ; internal filament shortly articulate, 

 often somewhat moniliform, often interrupted, green, or, in mature state, brownish ; joinU 

 often disjoined, mostly shorter than the diameter, finely granulate; branches mostly single; 



sheaths moderately close, sometimes ample, not distinctly lamellate, rather thick, hyaline, 

 colorless, or, in old age, light fuscous brown ; heterocysU mostly wanting. 



Remark*. I found this plant in the large spring that supplies Bcllcfonte with 

 water, growing attached to mosses, so as to form little dark-green mats around 



