117-2 Eu-Floride;e, Dasyese, Dictyurus. 



Dasya Ag. — Frous quoquoversum ramosa. CelluUe pericentrales 5 (rarissirne 

 tautuin 4j. Tetrasporangia cellulis binis exterioribus semitecta. 



B) Frons plus minus evidenter dorsiventraliter constructa. Rami distiche 

 dispositi, liaud ex omnibus articulis axis principalis properantes. Tetraspo- 

 rangia cellulis 2 transverse divisis omnino tecta. 



Tleteroaiphonia Mont. — Syrupodia lateralia e basi tequilata uniformiter ramosa. 



Cellulse pericentrales 4, 6 aut numerosiores, indiviste aut extrorsum sub- 



divisse 

 Dasyella Falkenb. — Sympodia lateralia e basi abrupte et valde constricta in- 



ferne nuda, superne (apice) ramos laterales dense confertos gerentia. Cellulye 



pericentrales 4, ecorticatse, extrorsum ac introrsum in cellulas laterales 



secedentes. 



C) Frons parasitica, pulvinaeformis. Cellulse pericentrales transverse diviste. 

 Colacodasya Schmitz. — Sticbidia indivisa, furcata aut lateraliter ramosa. 



II. Tetrasporangia in sticbidii unoquoque segmento singula '). 

 Haplodasya Falkenb. — Frons minuta, parasitica. 



DICTYURUS Bory [1836] in Belanger Voy. Ind. orient. p. 170 (Etyni. 

 dicti/ou rete et oura cauda), Kuetz. Sp. p. 673, J. Ag. Sp. II, 

 3, p. 1240 ex parte, Engl. et Prantl Natiirl. Pilanzeniam. (1897) 

 p. 476, Falkenb. Rhodomelaceen (1001) p. 675, Calidictyon Grev. 

 [1836] in Wight et Arn. Prodr. Fl. pamins. Ind. orient., Lindl. 

 Nat. Syst. of Bot. ed. II, p. 452, Mont. in Orb. Dict. III (1849), 

 p. 47, Thurclio' sp. auct. — Frons erecta, radiatim constructa, 

 structuram cellulosam pmebens, teretiuscula, lateraliter ramis reti- 

 culo filorum areolas pertusas rotundato-hexagonias ambientium 

 velatis, velo ramulis a rachide egredientibus, anastomosi invicem 

 junctis, articulatis, monosiphoniis aut principalibus sensim polysi- 

 phoniis venas constituentibus formato. Crescentia apicalis ramorum 

 frondis principaliuiu sympodica. Celluke pericentrales in axillis ra- 

 morum principalium ac sympodiorum lateralium quaterna 1 , cortice 

 secundario hyphoideo extrorsum cinctse. Tetrasporangia in sticliidiis 

 a rainellorum basi incrassata polysiphonia transformatis, utrinque 

 adnatis compresso-conicis furcatisque circumcirca evoluta, zonis 

 transversalilms superpositis pluriseriata, in quoque segmento sre- 

 pius 6, triangule divisa. Cystocarpia ac antheridia ignota. 



') Cfr. etiam Dasyam spyridioidem, et Dasyam Harveyi. 



