224 En-Floridege, Oi^-artinece, Gigai-tina. 



pus Kuetz. Sp. p. 78;^ tab. 21, Iridcm clathrata Decne in Ann. 



S(;. Nat. ser. III, t. II, 1814, p. 236: fronde coccineo-purpure i, 



crassioro, soris tetrasporanglforis inimersis demuni foramina pervia 



lin(iuentibus. A.d Novani Zelandiam, insulas « Aucldanl» et « Camp- 



bell» (Hooker); ad oras occidentales Americse bjrealis (Mkn/ies). 



— Frondes a radice scutati erectiuscube ca3spitosa3, ima basi cylin- 



dracese, calanum scriptorium crassitie oequantes, vage ramoste, 



ramis in expansiones foliaceas simpliciusculas, juniores subspatliu- 



latas evidentius canaliculatas, adultas obovatas ellipticas oblongasve, 



simplices aut raro dichotomas, 10-50 cm. longas et 5-14 cm. latas 



ab(nintil)us. Margines frondis in diversis formis nunc integerrima?, 



niinc papillis inaMiuales, nunc subregulariter serratie. Dis^uis (|uofiue 



aut nudus, integer vel foraminibus densis cribrosus aut pipillis fruc- 



tiferis brevissimis obovato-truncatis densissimo obsitus aut tota frons 



papillis lingulatis 2-5 millim. longis compresso-planis subcanilicu- 



latis obsita est. Cystocarpia papillarum apice obtuso singula im- 



mersa. Tetrasporangia in soros rotundatos subprominentes infr.i 



superficie u frondis collecta. Substantia crassa carnosa, in var. ame- 



thystina tenuior et luagis gelatinosa, in var. Hystrice et clatliratfi 



crassior, exsiccatse firmior. Color quoque in diversis formis nunc in 



amotbystinum nunc in coccineum tendens. 



5S. Gigartina exasperata Bail. et Harv. in Harv. Ner. Bor. Amer. ^^<' 



pag. 177, J. Ag. Epicr. pag. G86. — Stipite evidentiori mox 



complanato in frondem I mceoIato-obI;)ngam carnoso-membrana- 



ceani s^epe maximam, margiuo parum incrassato cinctam abeunte, 



frondibus sterilibns levibus aut a margine et disco dentatis aculea- 



tisve, tetrasporaiigiferis supra paginam verrucis planiusculis minute 



verruculosis obsitis, carposporiferis per totam superficiem ipsumque 



marginem papillosis, linea angusta intra-marginali nudis. 



Hah. ad oras Californioe (B.uley). — Ha?c species, observante 

 .1. Agardli, tennitate lamince ad Gigartina circnincinctam accedit, 

 forma frondis vero et praicipue tetrasporangiis dignoscenda. lu 

 (i. circwmcincta velut in G. radi.ila sori sunt frondi immersi, in 

 G. exasperata sunt in verrucis subprominulis collecti et pluribus 

 in eadem obvenientibus , ipsa^ verrucrc verruculos;c adparent. In 

 G. microphijtla sori non in verrucis i^laiiiusculis, sed in papillis 

 prominulis colliguntur plurcs, characterem ita (ulterius productum) 

 :tn;(I()gum otT(M'eutes. 

 51). Gigartina stiriata (Turu.) .1. .\g. Sp. 11, p. 277, Epicr. p. 203, u\ 

 Fucus stiriatus Turn. Hist. Fuc. t. 16, Facus Koelreuteri L. Syst. 



I 



