Eii-Floridcie, S()liei-it';o, Tliysanocladia. 379 



THYSANOCLADIA Kndl. [1848] Gen. plant. suppl. III. p. 44 (Etyui. 

 Hn/sunos rnubria et clados ranuis), Kuetz. Sp. p. 7()!), J. Ag. Sp. 

 II, p. G14, Epicr. p. 384, Anal. algol. II (1894), p. 52 (fructific. 

 descr.), Sclunit/, et HauptlL in Engl. & Prantl Natiir]. Ptlanzenfani. 

 142 (189G), p. 379, Lenormandia Mont. [1844] in Ann. Sc. Nat., 

 13ot., 1844, p. 158 (non aliorum), Mannnea J. Ag. [1841] Synib. I, 

 p. 22 partim, Rhodonieloi , Spluurococci , Rhyncococci, Bonne- 

 maisonice, Gelidii, Prionitidis sp. auct. nonnull. — Erons com- 

 planata, distiche et opposite decomposito-pinnata, tribus stratis 

 contexta, medullari filis elongatis, articulatis, dense intricatis, inti- 

 mis magis longltudinalibus, intermedio cellulis majoribus rotun- 

 dato-angulatis, corticali cellulis minoribus verticaliter radiantibus 

 constante. Cystocarpia intra stratuni periphericum expansum siepius 

 aggregata, carpostomio demum instructa, nucleum compositum, fllis 

 strati medullaris cinctum foventia ; nucleoli circa cellulam placen- 

 tarem (centralem) quoquoversum radiantes, columnis fllorum steri- 

 lium a placenta ad ambientem plcxum extensis separati, filis car- 

 posporiferis inferne articulatis, superne clavato-obovatis constituti; 

 carpospora^ minut^e, rotundatre, in artirulis singulis plures quasi 

 muco cohibitce. Tetrasporangia oblonga, zonatim (hucusque in una 

 tantum specie observata) divisa. 



Ohs. Frondes ferrugineo-purpurascentes, submembranaceaB, com- 

 presssB aut fere planae, pinnatie, pinnis dentatis aut serratis, den- 

 tibus aliis simplicibus, aliis in pinnulas iterum compositas excre- 

 scentibus, seniles (saltem in una specie) caulescentes, caule crasso, 

 pinnis sparsioribus obsito. Triplici strato frondes context:e sunt, 

 Eila axin constituentia stratum ampluni efficiunt, fere omnia lon- 

 gitudinalia. densissime stipata, cylindracea aut subclavata. uno 

 nempe apice incrassata, altero longe attenuata, tubo hyalino et 

 endochromate colorato in articulos secedente, constituta. Stratum 

 intermedium cellulis lumine majori donatis, rotundato-oblongis, 

 granula pauca foventibus aut fere inanibus, intarioribus oblongis 

 magis longitudinalibus, exterioribus subrotundatis. Cellula3 stratum 

 extimum constituentes, endochromate colorato farctte, verticaliter 

 oblongte, subradiatae. J. Ag. Sp. II, p. 615. 



I. Froiule regulariter pinnatira decomposita, pinnis oppositis utrinqiie singulis, 

 pinnulis ultirais serraturas jilus minus acurainatas gerentibus. 



1. Thysanocladia serrata Harv. Alg. exsicc. Eriendl. Isl. n. 31, Kuetz. 720 

 Tab. Phyc. XIX, t. 29, J. Ag. Epicr. p. 285. — Ei*ondibus a caule 



