Wood.] ^^^ [June 18, 



FAM. SIROSIPHONEACEAE. 



GEN. SIROSIPHON. 

 s. PULViNATUS. Breb. 

 Hab. In rui^ibus irroratis prope Philadelphia. 



S. GUTTULA. Sp. Nov. 



S. in maculis subnigris, parvis, tenuibus, plerumque rotnndatis, inter- 

 dum enormibus, dispositum ; tricliomatibus arete intertextis, ramossis- 

 simis, rigidis, inaequalibus, subcj^lindricis, nonnihil contortis ; ramulis 

 abbreviatis vel nonnihil elongatis, apice obtuse rotu.ndatis ; ramulorum 

 et trichomatum cellulis tri-multiseriatis, plerumque pachydermaticis, 

 ferrtigineo-fuscis, enormiter globosis, homogeneis ; cellulis apicalibus 

 interduin breve cylindricis, haud articulatis ; vaginis sat amplis, luteo- 

 brunneis vel dilute ferrugineo-brunneis. 



Arranged in small, thin black spots, which are generally round, 

 but sometimes irregular : filaments closely interwoven, very much 

 branched, rigid, unequal, subcylindrical, somewhat contorted ; branches 

 abbreviate or somewhat elongate, apex obtusely rounded ; cells of the 

 trichoma and branches 3 to many seriate, mostly with thick coats, ferru- 

 ginous-fuscous, irregularly globose, homogeneous ; apical cells sometimes 

 shortly cylindrical, not articulate, sheaths ample, yellowish brown. 



Diam. max. trich. cum vag. yig"=.0013. 



Hab. South Carolina, ad Taxodium distichon corticem. Prof. Ra- 

 venel. 



S. ACERVATUS. Sp. NoV. 



S. in guttulis minutissimis, svibcrustaceis, nigris, in strato sub- 

 continuo saepe aggregatis ; tricliomatibus parvis et brevibus, rigidis, 

 admodum inaequalibus, prostratis, tuberculis, arete et dense ramos- 

 sissimis, viridibus aut aureis aut brunneis ; ramulis brevibus, pler- 

 umque haud ramulosis, erectis aut ascendentibus, saepe abbreviatis, 

 papilliformibus, obtusis, saepe lateraliter connatis ; cellularum serie in 

 tricliomatibus multiplici in ramulis plerumque simplici ; cellulis subglo- 

 bosis vel subangularibus, viridibus, haud distincte granulosis, in ramu- 

 lorum apice saepe breve cylindricis et interdum obsolete articulatis ; 

 vaginis aureis, nonnihil hyalinis. 



Arranged in drops, which are very minute, subcrustaceous, black, 

 and frequently aggregate into a subcontinuous stratum ; filaments small 

 and short, prostrate, rigid, somewhat unequal, tuberculate, densely and 

 closely branched, green or golden or brown ; branches short, for the most 

 part not branched, erect or ascending, frequently abbreviate, papiliform, 

 obtuse ; series of cell multiple in trichoma, mostly simple in the 

 branches ; cells subgiobose or subangular, green, not distinctly granu- 

 late, in the apices of the branches frequently shortly cylindrical and 

 sometimes obsoletely articulate ; sheaths golden, somewhat hyaline. 



Hab. South Carolina, ad corticem (Ilex opaca). Prof. H. W. Ra- 

 venel. 



