3g4 Confervoideie, Cladaplioraceae, Struvea. 



STRUVEA Sond. [1845] Nova Alg. gen. et species quas in itin. ad 

 oras ocoid. Novjie HollandiaB coll. L. Preiss in Botanische Zeitung III. 

 Jahrgang, 4, p. 49, Pl. PreissiauEe II, pag. 151 (Etym. ab H. de 

 Struve rossico legato), J. Ag. Till Algernes Systematik VIII, 

 p. 108, Murray et Boodle A structural and systematik Account 

 of the genus Struvea in Annals of Botany vol. II, 1888, n. 7, 

 p. 265-282, tab. 16, Phyllodiciyon Gray [1866] in Jouraal of Bo- 

 tany 1866, p. 69, Pterodictyon Gray [1806] in Journal of Botany 

 1866, p. 70, Cormodiclyon Piccone [1884] Crociera del Corsaro 

 Alghe, p. 21 in nota, Cladophorcv sp. Harv. — Thallus erectus, 

 tubulosus, membranaceo-coriaceus, pallide viridis; stipes simplex 

 vel ramosus, radicatus, monosiphonius, continuus, setate provecta 

 reticuio flabelliformi costato coronatus; reticulum seu flabellum ex 

 filis confervoideis plus minusve articulatis, pinnatis, apice per or- 

 gana peculiaria (tenacula) adhserentibus evolutum. 



Obs. Alga marina, radicibus flexuosis, tubulosis instructa. Ge- 

 nus vix Siphonocladiaceura. Cfr. Observationes in appendicem Slru- 

 'vecv plumoscv Sond. 



1. Struvea plumosa Sood. in Botanische Zeitung 1845, n. 4, Alg. mc, 

 Preiss. p. 4, Kuetz. Tab. Phyc. VI, pag. 31, t. 90, Harv. Phyc. 

 australica I, tab. XXXII, J. Ag. Till Algernes Systematik VIII, 

 p. 109 (noraen), Murray et Boodle A struct. aud syst. account of 

 the genus Struvea p. 280, n. 1, t. 16, f. 1. — Flabello oblongo- 

 ovali, 2,5-5 cm., raro ultra longo, crenato, filis anastomosanti- 

 bus, 2-3-pinnatis; articulis pinnarum diametro 2-3-plo, pinuu- 

 larum sesqui longioribus ; stipite rugoso. 



Hab. ad Novam Hollandiam austro-occidentalem, imprimis ad 

 ins. uRottnest)) (Preiss, Clifton, Harvey). — Frondes plures 

 8-20 ca3spitem densum formantes, rhizoidibus tenuissimis, intrica- 

 tis scopulis adhscrent. Rhizoides tubulosi, continui, cornei, niten- 

 tos, fistulosi, pellucidi, nec substantia chlorophyllosa repleti, flexuo- 

 si, plerumque elongati, indivisi vel subdichotomi. Frons erecta, co- 

 riacea, tubulosa, aetate juniori viridis, spathulata, seriore elongata, 

 basi apiceque angustata,- pallida, hyalinula, nitidula vel crusta cal- 

 carea levissime obducta, annulatim constricta, in media parte dia- 

 raetro 1 mm. aequans ibidemque annulis vel nullis vel obsoletis 

 pnodita. Apex elongatus parte frondis inferiori quidem simillimus 

 est, structura tamen diversa gaudet; nam annuli, qui illic cavi sunf, 

 ut frons ipsa tubuni efTiciat, hic mombranis tonuissimis alius ab 



