198 Eu-Floridese, Gigartinese, Gigartina. 



Sectio 1. AcicuLAKES J. A?. Epicr. p. 190: Species froii !ibus tereliusculis aut 

 compresso-planis linearibusque, ramis saltem junioribus eximie subulntis; cy- 

 stocarpiis ad ramos pinnasve eeterum vix mutatas lateraliter intumescentibus, 

 sparsis aiat ssepe in eodem pluribus aggregatis. 



A. Fronde teretiuscula vage quoquoversum ramosn. 



1. Gigartina acicu'aris (Wulf.) Lamour. Essai p. 14, J. Ag. Sp. II, 383 

 p. 203, Epicr. p. 190, Ardiss. Phyc. Merl. I, p. 167, Kuetz. Sp. 

 p. 749, Tal). Phyc. XVIII, t. 1 c-e, Harv. Phyc. Brit. tab. 104, 

 Hauck Meeresalgen p. 136, Gigartina compressa Kuetz. Phyc. 

 geiier. p. 403, Sp. p. 750, Tab. Phyc. XVIII, t. 2, Sphwrococcus 

 elongatus Delle Chiaje Hydrophyt. Neap. tab. XVIII, Fucus aci- 

 cularis Wulf. Crypt. aquat. n. 50, Turn. Hist. tab. 126 (excl. var.), 

 Engl. Bot. tab. 2190, Wulf. Crypt. aqu. n. 50, Spha?rococcas acicu- 

 laris Ag. Sp. p. 322, Syst. p. 237, Fucus plicatus Clem. Ensayo 

 n. 319, Fucus spinosus Gouan. iu herb. Mertensii. — Fronde 

 cylindracea, quoquoversum decomposito-ramosa, ramis elongatis, 

 patentissimis, recurvatis, subulatis, nonnunquam compressis; cysto- 

 carpiis ad medium ramulorum unilateralibus, sessilibus. 



Hah. ad rupes vehementiori fluxu expositas infra limitem ma- 

 ris; in Adriatico et Mediterraneo frequenter; in oceano Atlantico 

 a Britannia usque ad Gades et Gibraltar; in sinu Persico (Kotschy), 

 oreano Indico et Australi (sec. Harvey) ; eadem ad littora Japonia^., 

 ut videtur (Martens, Kaempfer) et Brasilia? (Pohl sec. Grunow). 

 — CaBspites intricati, supra rupes expansi, gregarii, a radice scu- 

 tata et demum fibrosa repcntes et erectiusculi. Frondes 3-8 cm. 

 longEB, 0,5 millim. crassaj, adscendentes, irregulariter dichotoma3 

 aut sa?.pius pinnatim ramoste, ramis basi subattenuatis, dein cy- 

 lindraceis, apico longe acuminatis, majoribus apice longe producto 

 recurvatis, inferioril)us longioribus decompositis, superioribus ra- 

 mulisquc simpliciusculis, eximie subulatis, plurimis s^epe secundis. 

 Cystocarpia subglobosa unilateraliter in ramulorum media parte 

 sessilia, plerumquc in ramulo solitaria, nonnumquam 2-4-nata, apice 

 sterili reflexo. Tetrasporangia in soros collccta, qui plerumque ra- 

 mulorum inferiorem partem unilateraliter incrassatam reddunt. Sub- 

 stantia firma, coriacea,undc specimina exsiccata charta^ vix adhaerent; 

 madefacta facilius dissolvitur. Color rccentis purpureus aut atro-vi- 

 rosccns, exsiccitionr' purpureo aut violaceo-niger. 



2. Gigartina contorta Bory Voy. Coqu. n 48, J. Ag. Sp. II, p. 365, :384 

 Epicr. p. 190. — Fronde e tercti compressa, inferne dichotoma, 



