192 Eu-Florideae, Gigartineae, Iridaea. 



Species iiiquirendae '). 

 I. Iridayv forsan genuinse. 



16. Iridaea pustulosa Post. et Riipr. Illustr. p. 18, t. XXXII, Kuetz. Sp. ^^'^ 

 p. 727. — Lamina crassa, gelatinoso-j^dutinosa, in sicco membranacea, 

 hreviter pedicellata, late cordati, margine integerrima, sinuata vel 

 appendiculato-fimbriata, purpurea; soris undique dispersis, pallide 

 rubris, margine elevatis, centro depressis, persistentibus. 



Hab. ad littora Camciatica. — Specimina adiilta pedem et 

 ultra lata, nec minus longa, hinc inde lacunoso-perforata. Sub- 

 stantia in sicco tenuis membranacea, humectatioue in gelatinara 

 crassam facile dilacerandam intumescit. Sori diametro 1 millim. 

 paullulum superantes. Specimina exsiccata charta3 adhierent. 



17. Iridaea heterocarpa Post. et Rupr. Illustr. p. 18, Kuetz. Sp. p. ^ 

 727. - Lamina firma, subcoriacea, (sicca) fusco-violacea. orbicu- 

 lata, sinuato-lobata, lobis ol)ovato-rotundatis, margine sinuatis vel 

 crenato-lobuhitis ; soris undique dispersis, nodulos adproximatos, 

 rotundos vel ovales, demum elevatos, determinatos, rubro-fuscos, 

 epidermide rimoso exciduos efformantibus. 



Hah. in oceano Paciflco septentrionali. — Sori ut in sp. ante- 

 cedente. 



18. Iridaea obovata Kuetz. Sp. p. 728. — Lamina latissime obovata, •^'^ 

 basi cito attenuata, in stipitem brevem teretiusculum producta; 

 cystocarpiis remote sparsis. 



Hab. ad Cap. «Horn» (Hooker). — Substantia membranacea 

 cartilaginea. Color purpureus. 

 10. Iridaea dichotoma Hoolv. et Harv. in Lond. Journ. 1815, p. 262, Kuetz. 365 

 Sp. p. 728. — Stipite brevi, cartilagineo, niox cuneato, furcato vel 

 pluries dichotomo sensim in laminam membranaceam ample cu- 

 neatam vel obovatam desinente, segmentis vel simplicissimis integris 

 vel furcatis vel dichotomis, ad marginem denticulatis vel grosse den- 

 tatis vel lobatis vel novas laminas emittontibus. 



Hah. ad insulas «Falkland». — Dubitant Auctores, an ab Irid. 

 micanti revera diversa sit. Frons tenuis, nitens, lubrica, demum 

 cystocarpiis immersis numerosissimis verrucosa. In Cryptogamia 

 antarctica haec species ininio omissa videtur. 



') Quid vero sit Surcotltalia NoviB-Hollandioe Kuetz. Tab. Pliyc. XVII, tab. 

 65, (luain forsan Iridmoe proximam esse suspicatur illustris J. Aganlh, plano 

 ignoro, nisi fragnientum sistat Hy menocladioe polymorphce. 



