1154 Eu-Floridese, Bostrychiese, Bostrychia. 



rumque curvatis. majoribus a basi longe attenuatis mollioribus; 

 stichidiis ovali-lanceolatis, longe pedicellatis, apice sterili superatis; 

 articulis brevissimis, 6-7-siphoniis, corticatis. 



Hab. ad rupes supra liinitem oceani Australis ad « Kerguelen 

 Land » (Hooker); ad insulas «Falkland» (Hohenacker). — Ca^spi- 

 tes 1-2 cm. alti, plus minus expansi. Frondes a surculis repentibus 

 et radicantibus erectiuscula 1 , simplices aut subdecumbentes, ramis 

 paucis vagis adscendentibus subsecundatis instructa?, crassitie setam 

 fere superantes; simplices ramique in compositis conformes, elon- 

 gatie plus minus curva?, nunc subrecurvoe, adultiores utrinque atte- 

 nuatse, supra medium nempe incrassata^, basin versus longius atte- 

 nuata?, apice abruptius acuminato; juniores rami suntabasi sursum 

 longius acuminati. Stichidia (sec. Hook. et Harv.) in pedicello ste- 

 rili elongato terininalia, ovali-lanceolata, subnodoso-articulata (cel- 

 lulas pericentrales tantum 4 prabentia), acumine sterili recurvo 

 superata, diametro longiora, subtriplicem seriem tetrasporarum 

 monstrantia. Articuli fere nusquam nudi ; in ramulis maxime juve- 

 nilibus articulus terminalis major monosiphonius conspiciatur: pro- 

 xime inferiores sunt diametro duplo saltem breviores, polysiphonii. 

 et qui dein sequuntur, mox corticati ; in adultiore parte, transver- 

 saliter secta, adparent cellularum series concentrica 1 3-4; pericen- 

 trales cellulae (4-)6-7. xArticuli siphonis centralis ceteris obvol- 

 ventibus duplo longiores ; siphones peripherici duplo longiores 

 quam latiores; sticta 1 corticales siphonibus interioribus conspicue 

 breviores. Color purpureus, exsiccatione nigrescens. Substantia 

 carnosa. 



Subgen. II. Helicothamnion (Kuetz.) J. Ag. Algol. contin. IV (1897), p. 79 

 ampl. Falkenb. Rhodomelaceen (1901) p. 525. — Cellulse pericentrales steriles 

 in segmenta duo transversaliter subdivisfe, h. e. cellula axili duplo lon- 

 giores. 



A Rami polysiphonii omnes cellulis pericentralibus 4 instructi. 



1. Frons omnino ecorticata. 



11. Bostrychia bryophila Zanard. Phyc. indicar. pugillus p. 137, n. 23, 1838 

 tab. IV, B, fig. 1-5, Dasya Lauterbachu Asken. et Schmidle in 

 Flora 1897, p. 324 lig. D (formam majorein sistens), Bostrychia 

 Lauterbachu Ask. et Schmidle in Allgem. botan. Zeitschr. 1897, 

 n. 7-8, Falkenb. Rhodomelaceen (1901) p. 523. — Fronde subdicho- 

 tome ramosa, ecorticata, per totam longitudinem pinnatim ramel- 



