862 Eu-Floridese, Polysiphonieae, Alsidium. 



Berthold inter Algas sinus Neapolitani Alsidium corallinum tan- 

 tum enumerat. Teste Ardissone Phyc. Medit. I, p. 354, Alsidiam 

 lanciferum Kuetz. formam Alsidii corallini Ag. potius sistere 

 videtur; haec species habet ramos longiores et breviores vix di- 

 versos, illa monstrat eximiam differentiam inter ramos longiores 

 et breviores. 



3. Alsidium Helminthochorton (La Tour.) Kuetz. Phyc. gen. pag. 435, 1458 

 tab. 45, II, Sp. p. 844, Tab. Phyc. XV, t. 35, f. d-e, J. Ag. Sp. 

 II, 3, p. 840, Lucas in Hedwigia XXXIII (1894) p. 345, Falkenb. 

 Rhodomelaceen (1901) p. 167, t. 24, f. 14-15, Fucus Helmintlw- 

 chorton La Tour. in Journ. Phys. 1782 sept. tab. I, fig. 1, 10, 

 Hsemerl. Diss. (Erlangse 1792) cum tab., Turn. Hist. Fuc. t. 233, 

 Ceramium Helminthochortos Roth Cat. Bot. II, p. 168, Conferva 

 Helminthochortos Schwendiinann Diss. p. 3, Gigartina Helmin- 

 thochortos Lamour. Essai p. 49, Helminthochorton offcinale Link 

 sec. Kuetzing (plures algse commixtse), Spha?rococcus Helmintho- 

 chortos Ag. Sp. I, p. 315, Syst. p 235, Henr. in Pl. Med. Diisseld. 

 tab. 6, Gracilaria? Helminthochorton J. Ag. Alg. Med. p. 152, 

 Plocaria Helminthochorton Endl. — Frondibus a plexu fibroso 

 intricato surgentibus densissime csespitosis, filiformibus, parce di- 

 chotomo«-ramosis, ramis vagis elongatis parum attenuatis, superio- 

 ribus sparsis demum tetrasporangia generantibus verrucoso-torulo- 

 sis; cystocarpiis subsessilibus, ovoideis. 



Hab. in mari Mediterraneo ad oras Corsicoa (Gentile), Sardi- 

 nise (Piccone) et Galloprovincire (J. AGARDH);in mari Adriatico ad 

 littus Dalmatipe (Kuetzing, Hauck) et ad « Rovigno » Istriae hoc 

 loco cystocarpiferum in Cystoseira insidens (Lucas). — Planta 

 eximie csespitosa.Frondes a plexu fibroso radicali,filis decumbentibus 

 ramosis plerumque crassioribus verrucoso-inaequalibus constante, 

 assurgentes, filiformes, 2-5 cm. longre, crassitiem setse requantes 

 aut superantes, simpliciusculne aut dichotomse nunc ramis paucis 

 vage exeuntibus instructae, hic illic, prrecipue ubi rami plures ad- 

 proximati, nodoso-verrucosae, sa?.pe stricturis, frondis prolificationes, 

 parte superiore abrupta, ab inferiore provenientes indicantibus 

 notata^, sursum parum attenuata^, ramis elongatis conformibus. 

 Tota frons plus minus evidenter articulato-fasciata, axi centrali 

 polysiphonio, siphonibus circiter 8 pericentralibus constituto et 

 corticali strato plus minus denso contexta; corticales cellula^ extiin:!' 

 a superficie visce angulat» adparent. In ramis superioribus, cortice 

 quasi emollito verrucosis, ceterum haud mutatis tetrasporangia 



