Rii-FIori(lc;io, Cystocloniea>, Cystocloiiiiini. 315 



jiorc parte stipitis 1-B inin. crassi pullLilantibus, flbrosa sur- 

 gens, sa3pc 15-20 cm. longa, subpinnatini ramosissinia et dcconi- 

 posita, ramis nunc frondi conformibus et codem modo raniulosis, 

 nuuc multo tenuioribus abbrcviatis et subcorymbosis. liamuli pa- 

 tentes elongati et filiformos, basi plus minus attcnuati medioquc 

 incrassati, apice semper acuminati, 5-25 millim. longi aut longio- 

 res, 250-500 y. crassi, sctacei aut immo pennae passerina3 crassiticni 

 a3quantes. Cystocarpia in ramulo hinc nodose inflato immersa, singula 

 vel usque quaterna, raro plura in singulis ramis, invicem distantia, 

 ramulo triplo crassiora et ita circumcirca prominentia, 1 miUim. circ. 

 diametro ?equantia. Tetrasporangia in ramulis incrassatis immersa. 

 Color carneo-purpurascens. Substantia membranacea. 



2. Cystoclonlum capillare J. Ag. Spec. Algar. II, p 701. — Fronde git 

 tereti, subpinnatim decomposito-ramosa, ramis setaceis flliformibus, 

 ramulis utrinque attcnuatis, medio subcrassiore ; cystocarpiis in 

 ramo unilateraliter prominentibus, subsphasricis; tetrasporangiis in 

 superiore ramorum parte et in ramuUs aggregatis. 



Hab. in oceano Arctico ad Camciatcam (Wormskjold). — 

 Frondes ctespites 6-10 cm. altos densissimos efhciunt, singuke di- 

 midium millimetrum crassitie vix superantes, in modum Cijsf. ptir- 

 purascentis decomposito-ramosissima^. Rami patentes; ramuli sa^pe 

 patentissimi, basi brevius, apice longissime attenuati, 2-5 millim. 

 longi. Cystocarpia unilateraliter in ramis ramulisque prominula, 

 fere sphserica; pericarpium cellulosum cellulis angulatis contextum; 

 placenta centralis adcst, a qua nucleoli singuli radiare videntur; 

 nucleoli omnes in nucleum congiobati; carposporte, pro magnitudine 

 plant£e, magncC. Tetrasporangia in ramulis et superiore ramorum 

 parte aggregata, immcrsa, zonatim divisa. 



3. Cystoclonlum difficile (Ag.) J. Ag. Sp. 11, p. 308, Epicr. p. 239, 618 

 SpJuurococcus diffLcilis Ag. Sp. p. 317, Syst. p. 236, non Kuetz. 

 Tab. Phyc. XVIII, t. 80. — Fronde tereti subpinnatim decompo- 

 sito-ramosa, ramis ramulisque filiformibus utrinque attenuatis, me- 

 dia parte subcrassiori; cystocarpiis in ramo unilatcraliter prominen- 

 tibus, hemisphtericis. 



licib. ad oras Brasiliie (Chamisso). — Species quoad externum 

 habitum et structuram internam a Cystoclonio purpurascenti vix 

 distinguenda. Cystocarpia vero videntur majora, uno latere frondis 

 prominula, hemisphEerica. Reticulum cellulas prsegnantes cystocarpii 

 separans valde evolutum, carposporis paucis intra cellulas adhuc 

 inclusis. 



