14-18 Eu-Floridese, Geramieae, Ceramium. 



ramulorum provenientibus aut singulis aut pluribus semicir^ulariter juxta- 

 positis, inferiori sua parte intra cellullas geniculi immersis, superiori dimidia 

 parte aut iere totis nudis, cellulis sterilibus extrorsum bracteantibus. 



A) Frondes dichotomse subfastigiatse. 



6. Ceramium fastigiatum Harv. in Hook. Journ. Bot. III, p. 303, Man. 2265 

 p. 99, Phyc. Brit. t. 255, J. Ag. Sp. II, p. 119, Epicr. p. 96, Ar- 

 diss. Phyc. Medit. I, p. 109, Hauck Meeresalgen p. 105, Gongro- 

 ceras fastigiatum Kuetz. Sp. p. 678, Tab. Phyc. XII, t. 79, f. a-c, 

 Ceramium coccineum Zanard. Saggio classif. Fic. (1843) p. 55? 

 Ceramium inconspicuum Zanard. Syn. alg. p. 75, Not. cell. mar. 

 Ven. (1847) p. 44, n. 150, Kuetz. Sp. p. 677, J. Ag. Sp. II, p. 137?. — 

 Fronde capillari, regulariter dichotomo-decomposita fastigiata, seg- 

 mentis erecto-patentibus terminalibus forcipatis, articulis inferio- 

 ribus diametro 3-4-plo longioribus, superiorum interstitiis subco- 

 loratis; tetrasporangiis circa genicula verticillatis nunc paucioribus 

 extra stratum corticale eminentibus fere omnino nudis ; cystocarpiis 

 nd segmenta sessilibus, lateralibus, ramellis involucrantibus cysto- 

 carpiutn vix superantibus simplicibus paucis. 



Hab. in oceano Atlantico ad littora Anglke (Harvey) et Ame- 

 ricse borealis; in mari Baltico; in Mediterraneo ad oras Sardini;e? 

 (Piccone) et Adriatico (Kuetzing, D. na Favarger, Hauck); eadem 

 ad oras Nova^ Hollandia^??. — Cajspites densi, plerumque 4-8 cm. 

 longi. Frons capillaris, a basi ad apicem vix attenuata, regulariter 

 dichotomo-fastigiata, segmentis inferne distantioribus, superne den- 

 sioribus. Articuli inferiores hyalini, geniculis coloratis subelevatis 

 distincti, superiores endochromate roseo colorati, quod in exsiccata 

 planta etiam conspicuum, samius in strias varie contrahitur. Te- 

 trasporangia s;epe secus totum filum superius formata supremis 

 segmentis sterilibus, ad geniculum quodque plura (4-6) subemer- 

 gentia. Planta cystocarpifera gerit ramulos laterales sparsos. Cysto- 

 carpia in segmentis lateralia, plerumque 2-3 adproximata, singula 

 involucro fulta, minuta, rotundata, diametrum fili, in quo insident, 

 vix superantia. Ramuli involucrantes unil iterales, ipso segmcnto 

 frondis fructifero alterum latus sustinente, 2-4, brevissimi, cysto- 

 carpium ipsum longitudine vix superantes, simplices fere subulati. 

 Color csespitis purpureus, filoruni (prsecipue terminalium) coccineus 

 aut roseus. Substantia flaccida et chartoe minus arcte adhserens. 

 Ab hac specie vix differre videtur Ceramium Kellneri Mcnegh. in 

 Giorn. bot. ital. 1844, p. 183, J. Ag. Sp. II, p. 139, Gongroceras 



