Eu-Florideae, Polysiphonieae, Polysiplionia. 871 



phonia Notarisii Monegh. in Erb. critt. ital. ser. I, n. 211, Ce- 

 ramium Morisianum IJertol in Moris Stirp. Sard. Flenc. III, 

 [». 23, Polysiphonia stricta Moris et De Not. Fl. Caprar. p. 209, 

 Polysiphonia veneta Zanard. Not. cell. ven. pag. 25?. — Csespite 

 hemisphaerico, filis a basi articulatis subdichotomis ramisque mi- 

 noribus obsitis, ramis patentibus sparsioribus vagis aut subpeni- 

 cillatis, articulis 4-siphoniis, primariorum diametro 2-4-plo, ramo- 

 rum duplo longioribus aut aequalibus; tetrasporangiis in ramulis 

 torulosis longe seriatis; cystocarpiis pedicellatis urceolatis. 



Hab. ad rupes magis expositas in limite maris Adriatici (Kuet- 

 zing, Hauck), maris Mediterranei ad littora Galliae (Ghateloup), 

 Grnecige (De Toni) et Italiae, et oceani Atlantici usque ad littora 

 Angliae (Harvey). — Caespites hemispluerici, 2-8 cm. longi, lubrici, 

 iastigiato-densissimi. Fila erectiuscula, capillaria aut tenuiora, dicho- 

 toma ramulisque minoribus lateralibus obsita. Ramuli vagi, nunc sub- 

 seeundati, in planta juvenili et tetrnsporangifera numerosiores fere 

 penicillati, basi patentes, dein erectiusculi elongati planta^ adspe- 

 ctutn flaccidum tribuunt; in cystocarpifera et senili sparsiores magis 

 patentes et subdivaricati plantam reddunt rigidiorem. Articuli lon- 

 gitudiue variant pro magnitudine speciminum; ssepius in filis pri- 

 mariis 2-3-plo diametro longiores, in ramulis sequales aut parum 

 longiores; nunc in illis usque 4-plo, in his 2-plo longiores, ba- 

 sales filorum semper breviores, omnes 4-siphonii. Tetrasporangia 

 in ramulis longa serie in articulo quoque provenientia ramulos 

 reddunt eximie torulosos fere siliquseformes, nunc apicem, nunc 

 totum ramulum occupantia, quin immo in ipsis ramis, ramulos ge- 

 nerantibus, in planta robustiori et breviori nidulantia. Cystocarpia 

 ramulo brevi suffulta, ad ramos superiores provenientia, demum 

 urceolata, proportionaliter magna. Colore variat ab olivaceo-fusce- 

 scente in purpureum. Exsiccata arcte adh^eret chartoe. 

 Polysiphonia tenerrima Kuetz. Phyc. gen. (1843) p. 417, Sp. p. 804, 1466 

 Tal). Phyc. XIII, t. 28, f. f-l, J. Ag. Sp. II, 3, p. 1063, Falkenb. 

 Rhodomel. (1001) p. 124, Hutchinsia tenerrima Kuetz. Actien 1835, 

 Pohjsiphonia Nemalionis Zanard. Saggio p. 54, Polysiphonia floc- 

 cosa Zanard. (caespite paullo majori), Polysiphonia sertularioides 

 var. tenerrima Hauck Meeresalgen p. 220, Potysiphonia subtilis 

 De Not. in Atti II Riun. Sc. ital. in Torino pag. 201, Ardiss. 

 Pliyc. Medit. I. p. 374 (non alibi nec alior. auctor.). — Fronde 

 minutissima, repente, radiculis elongatis fine dilatatis, ramis flagel- 

 liformibus penicillatis, utrinque parum attenuatis, articulis 4-si- 



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