1008 Eu-Floridese, LophothalieaB, Brongniartella. 



Lophothalia Kuetz. — Cellulse pericentrales 5. Tetrasporangia in quoque arti- 



culo bina. 

 Doxodasya Schmitz. — Cellulae pericentrales 4. Tetrasporangia ut in genere 



Lophothalia. 

 Murrayella Schmitz — Frons ecorticata. Cellulse pericentrales 4. Tetrasporan- 



gia in quoque articulo stichidii quaterna verticillata. 



II. Rami distiche egredientes. 



t Iftoptera Okam. — Cortex eximie parenchymaticus. Cellulse pericentrales 4. Sti- 



chidia ut in genere Lophothalia. 

 ? Pteronia Schmitz. — Cortex in inferiori parte frondis adultioris ex hyphis 



constans. Cellulse pericentrales 4. Stichidia ignota. 



BRONGNIARTELLA Bory [1822] in Dict. class. d'hist. nat. (Etym. ab 

 illustri botanico gallico Brongniart), Schmitz Die Gattung Lopho- 

 thalia (1893) p. 217, Engl. & Prantl Natiirl. Pflanzenfam. (1897) 

 p. 416, fig. 249, Falkenb. Rhodomelaceen (1901) pag. 541, Fuci, 

 Lophothalicv, Polysiphonice, Confervce, Hutchinsice, Grammitce, 

 Ceramii, Binderce, Griffithsice, Cladostephi, Dasyce sp. auct. — 

 Frons radialiter constructa, pilis coloratis ssepe subdichotomo-ra- 

 mosis spiraliter dispositis ornata. Axis polysiphonius, cellulis pe- 

 ricentralibus 5 aut 7 (rarius 4), diu nudus aut mox vel serius rhi- 

 zoidibus dense confluentibus obtectus. Crescentia monopodica, cel- 

 ltila apicali transverse articulata. Rami laterales e cellula basali 

 pilorum provenientes, partim in ramos fructiferos breves, partim 

 in ramos prolongatos transformati. Cystocarpia et antheridia ut in 

 genere Polysiphonia. Tetrasporangia in ramulis plus minus stichi- 

 diiformibus numerosa, in quoque articulo singula, secus lineam lon- 

 gitudinalem spiralem disposita. 



Obs. Genus a Polysiphonia dignoscitur imprimis pilis coloratis 

 monosiphoniis persistentibus, habitum peculiarem plantse tribuen- 

 tibus. 



1. Brongniartella byssoides (Good. et Woodw.) Schmitz Die Gattung ig~o 

 Lophothalia (1893) p. 217, Falkenb. Rhodomelaceen (1901) p. 543, 

 t. 19, f. 8-10, Fucus byssoides Good. et Woodw. in Linn. Tran- 

 sact. III, p. 229, Conferva byssoides Smith in Engl. Bot. t. 547, 

 Dillw. Conf. tab. 58. Hutchinsia byssoides Ag. Syn. p. 60, Syst. 

 p. 158, Sp. Alg. II, p. 99, Lyngb. Hydr. Dan. pag. 110, tab. 34, 

 Polysiphonia byssoides Grev. Edin. p. 309, Harv. Man. Ed. II, 

 p. 92, Phyc. Brit. tab. 284, Kuetz. Phyr. gen. p. 430, Sp. p. 834, 

 J. Ag. Sp. II, 3, p. 1042, Magnus in Bot. Zeit. 1872, p. 251, Reinke 



