Eu-Floridese, Polysipliouieaa, Polysiphonia. 887 



chartas arcte adhaerent. Obscrvante claro J. Agarclh, ha)c species 

 videtur, quodain respectu, nempe ramulis juvenilibus tenuisshnis, 

 cum P. arachnoidea comparanda, sed minor, crescendi modo ra- 

 mulisque patentioribus diversa. A P. intricata et P. divaricata 

 distat quoque crescendi modo; in his csespes ita intricatus, ut nul- 

 lum fere aut initii aut finis videas discrimen; in P. erythrcea 

 pars centralis csespitis et basalis filorum a superiore facillime di- 

 stinguitur; regulariter nempe sursum increscit P. erythraea, licet 

 csespes globosus evolvatur et fila intra csespitem radiculis emissis 

 intricata evadant. P. Olneyi Harv. forsan omnium proxima, sed 

 haec quoque colore, articulorum longitudine etc. dignoscenda. 

 27. Polysiphonia breviarticulata (Ag.) Zanard. Syn. p. 61, J. Ag. Alg. I 490 

 Med. p. 134, Sp. II, 3, pag. 1007, Kuetz. Sp. Alg. p. 815, Tab. 

 Phyc. XIII, t. 64, f. c-f, Ardiss. Phyc. Medit. I, p. 407, Hauck 

 Meeresalgen p. 223, Hutchinsia breviarticulata Ag. Syst. p. 153, 

 Sp. Alg. p. 92, Polysiphonia physarthra Kuetz. Sp. p. 815, Tab. 

 Phyc. XIII, t. G3, f. d-g (stichidifera), Polysiphonia chrysoderma 

 Kuetz. Sp. p. 81(5, Tab. Phyc XIII, t. 68, f. a-d (status senilis?), 

 Polysiphonia apiocarpa Zanard. mscr. Polysiphonia reticulata 

 Zanard. (fide Kuetz.), Ceramium fastigiatum Ruch. Fl. Venet. p. 269 

 (lide Zanard.) ?, Hutchinsia fastigiata Mart. Reise p. 640. — Cae- 

 spite erectiusculo, filis a basi articulatis decomposito-dichotomis, 

 inferne firmioribus tenue corticatis, superne collabentibus compla- 

 natis, fertilibus dense virgatis, ramulis simpliciusculis utrinque 

 attenuatis, articulis 4-siphoniis, diametro duplo brevioribus; tetra- 

 sporangiis in ramulis distorto-llexuosis sparsis; cystocarpiis late 

 ovatis, ad ramulos sessilibus. 



Hab. in mari Mediterraneo ad littus Grallise, in mari Ligustico 

 ad « Spezia » (Galdesi); in Adriatico ad littora ltalioe ad Venetias 

 (Ruchinger, Nardo, J. Agardh, D." a Favarger), Istria? ad « Pirano » 

 (Hauck) et Tergeste (Biasoletto) et Dalmatise. — A coespite intri- 

 cato fila nonnulla emergunt erectiuscula, 5-10 cm. longa, inferne 

 pennam passerinam crassa et quoad substantiam firma, sursum 

 sensim a.t paruni attenuata, quasi molliori substantia constituta et 

 exsiccatione eximie collabentia, iterum vix in forniam teretem re- 

 deuntia, sterilia subdichotoma et parum ramulosa, tetrasporifera 

 rainulis quasi prolificantibus plus minus densis obsita. Ramuli 

 sine ordine sparsi, patentes, simpliciusculi, furcati aut parce ra- 

 mellosi, utrinque attenuati longiusculi, tetrasporangia foventes dis- 

 torto-nexuosi. Articuli in tota planta conspicui et eandem fere 



56 



