Eu-Floridese, Lopliothaliese, Murrayella. 1023 



superne monosiphonii diametro circiter aequales. Stichidia ex ra- 

 mulorum rachide polysiphonia, infra apicem ramuli, constituta, vix 

 transformata et circumcirca ramellosa, tetrasporangia spirali or- 

 dine disposita at valde adproximata (ob articulos breves), nac 

 proprie verticillata gerentia. Fronde transversaliter secta slphones 

 pericentrales 4 conspiciuntur exteriorum parum minorum strato 

 denso corticati. 



MURRAYELLA Schmitz [1893] Die Gattung Lophothalia p. 227 (Etym. 



ab egregio phycologo anglico Georgio Murray), Engl. & Prantl 

 Natiirl. Pflanzenfam. (1897) p. 449, Falkenb. Rhodomelaceen (1901) 

 p. 562, Hutchinsice, Bostrychice, Polysiphonice sp. auct. — Frons 

 tota erecta aut e surculo decumbente (rhizoraatoideo) exsurgens, 

 radialiter constructa, ramellis brevibus simplicibus ramosisve spira- 

 liter alternantibus obsita. Axis polysiphonius cellulis pericentralibus 

 1 donatus, diu nudus. Crescentia monopodica, cellula apicali trans- 

 verse articulata, articulis in ramos laterales excrescentibus. Rami 

 laterales alternatim in pilos monosiphonios ramulosos simplicesve 

 aut in ramulos breves longioresve inferne polysiphonios superne 

 monosiphonios aut in ramos elongatos definitos vel indefinitos evo- 

 luti. Fructus in ramoruin elongatorum definitorum parte superiore 

 siti. Procarpia in ramis fertilibus elongatis numerosa, e pilis sim- 

 plicibus ramosisve monosiphoniis evoluta et e quarto vel quinto 

 articulo eoruni efformata, pedicello monosiphonio insidentia. Tetra- 

 sporangia in stichidiis propriis nidulantia, quaternatim exacte aut 

 paullulum oblique verticillata. 



Obs. Genus propter dispositionem tetrasporangiorum verticilla- 

 tam intra stichidium ad Bostrychiam quasi transiens, charactere 

 nunc memorato a Lophothalia et Doxodasya eximie dignoscen- 

 dum. In Bostrychia sunt prseterea frondes dorsiventraliter, in Mur- 

 rayella radialiter constructse; in hac siphones pericentrales 4 haud 

 subdividuntur, in illa siphones plerumque 5 (aut 4-10 quoad nu- 

 merum variabiles) modo peculiari mox transverse subdividuntur 

 et cellulas plures superpositas centralem eingentes efficiunt. 



1. Murrayella periclados (Ag.) Schmitz Die Gatt. Lophothalia (189:*.) 1686 

 p. 227, Falkenb. Rhodomelaceen (1900) pag. 563, t. 12, f. 24-25, 

 Hutchinsia periclados Ag. Sp. TI (1828) p. 101, Polysiphonia pe- 

 riclados Kuetz. Sp. (1869) p. 822, Bostrychia Tuomeyi Ilarv. 

 Nereis Bor. Amer. II (1853) p. 58, tab. XIV E (non Alg. Friendly 



