20S Eu-FloridecT, Gigartinea?, Gigartina. 



(FiiAUENFELD, Grunow). - Froiis 8-15 cm. longa, pennse fere cor- 

 vin« inferne crassitiem metiens, sursum sensim tenuior, apicibus 

 obtusis pennam columbinam fere sequantibus, sterilis dichotoma fa- 

 stigiata, segraentis patentibus flabellatim expansis; tetrasporangi- 

 fera superne subcompressa et densius dichotoma pinnisve confor- 

 mibus paucis obsita; in segmentis ultimis penultimisve sori utrin- 

 que singuli et plerumque oppositi, sublineares, 2-5 millim. longi- 

 tudine vix expansi, colore purpurascente in fronde carnea conspi- 

 cui; cystocarpifera denique frons pinnas emittit superne plurimas, 

 frondem dense corymbosam reddentes, pinnatim in rachide dispo- 

 sitas, decomposito-dichotomas, teretiusculas; cystocarpia in his la- 

 teralia. Color carneo-lutescens. Substantia plantte exsiccatse car- 

 tihiginea; madefacta facile dissolvitur. Structura generis. 

 23. Gigartina Kronsana Rabenh. Beitr. zur Meeresalgen-Flora der ^^^-^ 

 Aucldand-InselQ (Hedwigia 1878) p. 70. - Fronde vage ramosis- 

 sima, fruticuloso-expansa, stipite e basi dilatata ramis ramuhsque 

 tereti-compressis, ramulis ultimis (tertii et quarti ordinis) subulatis 

 nunc brevibus nunc elongatis, rectis vel plus minus curvatis, axil- 

 Us obtuse angularibus; cystocarpiis subgloboso-capituliformibus, 

 singulis in ramellis ultimis. 



Hab. ad insuks « Auckland » (H. Krone). — Frondes 15-25 

 cm. longai; rami 2-4 millim. lati, ramuli ultimi magis evohiti 

 usque ad Bcm. longi. Coh^r dilute vel obscure brunneus; substantia 

 durissima cornea. Gigartina2 ftabellatcu J. Ag, Kuetz. Tab. Phyc. | 

 XYHI. t. 5 affinis dicitur. 

 24 Glgartlna disticlia Sond. in Bot. Zeit. 1845, p. 55, Pl. Preiss. p. 28, i(J6 

 Kuetz. Sp. p. 750, Tab. Phyc. XIX, t. 18, Harv. Phyc. Austral. 

 tab. 297, J. Ag. Sp. II, p. 269, Epicr. p. 194. — Fronde carnoso- 

 crassa, elongata, dichotoma et distiche decomposito-pinnata, rachi- 

 dibus 'majoribus complanatis linearibus per totam longitudinem 

 obsitis, pinnis pinnulisque abbreviatis teretibus obtusis simpliciu- 

 sculis aut subdivaricato-furcatis; soris ad margines pinnarum elon- 

 gatis: cystocarpiis in pinnis transformatis provenientibus, in rachide 

 brevi subterminalibus, invohicro pinnularum ina^qualiter ambien- 



tium cinctis. 



Ilah. ad oras Nova3 HoUandia^ occidentalis (Preiss, De Ioni, 

 MiLNK, Harvey) et Nova?. Zelandia3. — Calhis radicalis disciformis, 

 late expansus. carnosuhis, plures frondes emittens. Frons 20-30 cm. 

 longa et ultra, basi teretiuscuhi, mox compressa, 4-5 mm. lata, 

 levi^^ssima. niti.lula, disticlie ramosa. Rami oppositi vel alterni, 



