FKKS II W A T I! II A 1. 1. !! "I mi; UNITED STATES. 69 



l>l:i<-kish-i:reen la\tr. which it makes upon tin- hark i- very peculiar, beini: almost 

 membranaceons, and especially in the dried state, presenting a rough, somewhat 

 wart\ surface. The trichomata ha\ e tin- sheath inure distinctly in tin* form of a 

 hollow cylinder, or, in other words, more plainly a sheath, than any other 8j>ocic8 

 I have seen of the jjenus- ; the cells are also without any apparent walls, and arc 

 placed \ery closel\ together, so that the whole filament looks very like a acyto- 

 n> imt. 



1, pi. !>, represents a portion of a frond magnified ;?('() diameters. 



M. pHliit idiihiM, WOOD. 



S. iuiii)iT>iis ; tricliDiiiatiliiiM ramossisftimis, nolitariii) vcl sulisolitariis ; ramis plorumquo nnila- 

 teralibus, raiiiul<is; nunulunim upirilm* late rntundatis, baud attonuntis; ccllulis in scrie- 

 IMIS -:in|.!i. il.ii- ili-positis, iu trirlniinatiliii* noiiiiihil rutundatis, in rnmulis uepe angularibns, 

 plrruniqiio comprrssis, diamrtro :r<|iialilius 4 ]>lo brcviorilnis ; tcnninalibua cylindricig et 

 obscure articulutis ; i-i-llnlis intcrstitialibus nullis ; Taginis arctis, bjalinis, baud laincllosis ; 

 cytii<plasiuatc u-rugiiu-u vcl brunneo, minute granulate. 



Diam. Trich. cum vg. ^f ," = .00106" ; sine rag. .0008". 



Syn. S. i-elluriilultu, WOOD, Trodromus, Proc. Amer. Philos. Soc., 1869, p. 133. 



//,//.. Iu gtagnis, prope Hibernia, Florida, t \l \V. Canby.) 



mi Tscd ; filaments rcry much branched, solitary or eubsolitary ; branches mostly unilateral, 

 branched; apices of the branches not attenuate, broadly rounded ; cells disposed in a simple 

 sprigs, in the trk-homa somewhat rounded, in the branches frequently angular, mostly com- 



sed, from equal to 4 times shorter than the diameter; terminal cell cylindrical, obscurely 

 articulate; interstitial cells none; sheath close, hyaline, not lamellate; cytioplasm a-nigin- 

 ou.s or brown, minutely granulate. 



l;*. This species was collected by Mr. William Canby in a little marsh 

 pool near Hihernia, Florida. The branches are given off in abundance, mostly in 

 a unilateral manner, are often very long, and about equal in diameter to the main 

 filament, and u'ive origin to numerous branchlets. The sheaths are very trans- 

 ut and very close. I have never seen them in any way lamellate or fibrous,' 

 or of any color. The cells do not have very apparent walls. In the main fila- 

 ment and branches they are globose, or, more commonly, very much compressed, 

 but in the newer branches, and sometimes in the older, they are very angular. 

 The few cells near the end of the branches are so shaped as to remind one of the 

 phalanges of the fingers. The last cell is cylindrical and has a number of cells 

 indicated in it. The color of the young cells varies from a deep bluish-green 

 to a ferruginous-brown that of the older from a light bluish-green to ferruginous- 

 brown. 



Fig. 2 a, and 2 6, pi. 8, represent portions of filaments of this species. 



8. compact!!*, (Ao.) KTZ. 



S. strato expanse, tomentoso, fnsco-nigro; trichomatibus elongatis ramulisqne adscendentibus, 

 apice intcrdnm paullum attennatis sed ssepe claratis, obtusis ; trichomatibus internis e cellu- 

 larnm scrie simpliri format!?, rt plcrumqne monilifortnibus ; cellulis diametro subcequalibus 

 Tel brevioribns, siiliploliosis vel siibqundratis. sippe compressis ; cytioplasmate dilute ciernleo- 

 Tiridc, subt ilitrr granulatis ; cellulis apicalilms rylindricis ct oscillariiim modo, Hiepc indistin<-t<>. 



