Ser. Rhodosperme^, Fara. Rhodomelacea. 



Plate CLXXIV. 



DASYA WRANGELIOIDES, Harv. 



Gen. Char. Frond filiform or compressed, dendroid ; stem and branches 

 coated with small, polygonal cells (rarely articulated, and many-tubed); 

 the axis articulate, composed of several radiating cells surrounding a 

 central cavity ; ramelli articulated, one-tubed. Fructification : 1, ovate 

 or urceolate ceramidia ; 2, lanceolate stichidia, attached to the ramelli, 

 and containing triangularly-parted tetraspores in transverse rows. — 

 Dasya {Ag.), from ha(jv<i, liairy. 



Frons fiUformis v. compressa, dendroidea. Caulia ramique majores strata cel- 

 hdarum corticati (raro pellucide articulati), rameUis monosiphoniis obsessi ; 

 axis articulatus, ex celUdis pluribm radiantibm tubum centralem chujentibus 

 formatus. Friict. : 1, ceramidia ovata v. urceolata ; 3, stichidia lanceolata, 

 exj'amellis enata, tetrasporas transversim ordinatas foventia. 



Dasya Ifrangelioides ; stem slender (2-4-uncial), pellucidly articulate, 

 10-12-tubed, distichously branched, closely set throughout wqth 

 minute, distichous, ramelliferous ramuli; branches few, patent, in- 

 curved, subsimple ; ramelli repeatedly dichotomous, acute, their arti- 

 culations once and a half as long as broad ; ceramidia globoso-urceo- 

 late, with a very long neck ; stichidia very minute, oblong-lanceolate, 

 acute. 



D. Wrangelioides ; caidi gracili (2-4:-imciali) pellucide ai'ticulato \Q-\2-sipho- 

 nio disticJie ravioso ramulis perbrevibus ramelliferis distichis obsesso ; romis 

 paucis patentibus incurvis simpliciusculis; ramellis multoties divaricato-di- 

 cJiotomis acutis eornm articulis diametro sesquilongioribus ; ceramidiis glo- 

 boso-urceolatis, ore longissimo cylindraceo ; stichidiis mimttissimis oblongo-lan- 

 ceolatis acutis. 



Dasya Wrangelioides, Harv. in Trans. R.I.Acad, v. 22. p. 542; Alg.Austr. 

 Exsic. n. 207. 



H AB. Fremantle, King George's Sound and Cape Eiche, JF. H. 11. Fre- 



mantle, G. Clifton. Western Port, Victoria, JF. II. II. 

 Geogu. Distr. West and south coasts of Australia. 



Descr. Stems numerous, tufted, rising from decumbent, creeping filaments, 

 2-4 inches long, setaceous, furnished with a few, irregularly alternate or se- 

 cund, simple, patent, incurved branches; all parts of the stem and branches 

 pellucidly articulated. Stem and branches set throughout, at distances of 

 half a line or less, with distichous, very minute, ramelliferous ramuli. Ra- 

 muli not a line long, clothed with multifid, squarrose, monosiphonous ra- 

 melli of about their own length. Ceramidia borne by the rainub', globose, 

 with a long, protruding, cylindrical neck and crcnulate aperture, areolated, 



