1294 Eu-Floridese, Mon osporeae, Bornetia. 



Subfamilia III. MONOSPQRE^ Schmitz. 



Monosporrre Schmitz [1889] Syst. Uebers. Florid, p. 1G, Engl. & Prantl Natiirl. 

 Pllanzonfam. (1897) pag. 483 (non Monosporecc Zoll. [1840] Obs. phyt. IT, 

 pag. 16). 



Frons filiformis, crecta, nuda, furcatim aut lateraliter ramosa, 

 articulis subcylindraceis. Cystocarpia in ramulis fertililms terminalia, 

 cx unico gonimoblasto composita, vario modo involucrata. Sporangia 

 triangule divisa ant radiatim pluripartita. 



Conspectus generum 



Bornciia Thur. — Cystocarpia ramulis arcuatis ramellosis involucrata. Sporan- 



gia triangule divisa. 

 Monospora Solier. — Cystocarpia corona ramulorum unicellularium involucrata. 



Sporangia triangule divisa, ssepe indivisa (monosporangia). 

 Pleonosporlum Naeg. — Cystocarpia ramulis singulis lateralibus tecta. Sporangia 



sporas numerosas radiatim ordinatas foventia. 



BORNETIA Thur. [1855] in Memoir. Soc. des Scienc. Nat. de Cher- 

 bourg III, p. 155 (Etym. ab illustri phycologo gallico Ed. Uounet), 

 J. Ag. Epicr. p. G12, Ardiss. Phyc Medit. I, p. 307, Hauck Mee- 

 resalgen p. 48, Engl. & Prantl Natiirl. Pflanzenfam. (1897) p. 488, 

 Griffithsice sp. auct. — Frons erect:i, filiformis, dichotome aut la- 

 teraliter ramosa, articulata, monosiphonia, nuda. Organa fructiflca- 

 tionis in ramulis abbreviatis lateralibus evoluta, intra involucrum 

 subregulare, ramellis incurvis constitutum, inclusa. Cystocarpia in 

 vertice ramuli terminalia, carposporis piriformibus a cellula pla- 

 centari quoquoversum radiantibus, singulis sacculo hyalino conformi 

 pedicellato inclusis constantia. Tetrasporangia interiore latere in- 

 volucri ad articulos faseiculatim disposita, juvenilia piriformia, 

 adulta subsphaudca, pedicellata, triangule divisa. Antheridia parva, 

 modo tetrasporangiorum disposita et involucrata. 



Obs. Suadente claro J. Agardh, qui sequentes de genere obser- 

 vationes congessit, habitu et structura frondes Griffithsiam ita 

 referunt, ut steriles haud distinguantur. Organa extcrna fructus 

 quoque sunt Griffitiisice; at nucleus cystocarpii est omnino di- 

 versus, nucleus nimirum hemisphsericus nulla communi membrana 

 cinctus, filis ahbreviatis, articulato-clavatis dichotomo-fastigiatis 



