Ser. Rhodosperme^. ram. Bhodomelacece. 



Plate LXXXVIII. 

 DASYA HAPALATHRIX, Harv. 



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

 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 sticJddia, attached to the 

 ramelli, and containing triangularly-parted tetraspores in transverse 

 rows, — Dasya {A(/.), from Saav^, hairy. 



Frons Jiliformis v. compressa, dendroidea. Caulis ramique majores strata cel- 

 tularum corticati (raro pellucide artlcidati), ramelUs monosiplionm obsessi ; 

 axis articulatus, ex cellulis pluribus radiantlhus tuhum centralem cinyentihus 

 formatiis. Fruct. : 1, ceramidia ovata v. urceolata ; 2, stichidia lanceolata, 

 ex ramellis enata, tetrasporas tran&versim ordinatas foventia. 



Dasya hapalathrix ; stem very long (3-6 feet), percurrent, inarticulate, 

 quite glabrous ; branches lanceolate in outline, alternate, twice or 

 thrice pinnately decompound, the ultimate ramifications setaceous, all 

 corticated and opaque ; ramelli confined to the ultimate branchlets, 

 very soft and byssoid, dichotomous, their articulations 4-5 times as 

 long as broad ; ceramidia (rather small) sessile, urceolate, with a 

 prominent orifice ; stichidia ovato-lanceolate, acuminate. 



D. hapalathrix ; caule lovgissimo (3-Q-pedaIiJ perctirrente inarticulato glaher- 

 rimo ; ramis lateralibus clrciimscripiione lanceolatis alternis bis terve pinnatim 

 decompositis ; ratmdis tdtimis setaceis, omnibus corticatis opacisque ; ramellis 

 ramulos ultitnos solum vestientibus mollissimis byssoideis dicliotomis, articidis 

 diametro 4<-Z-plo longioribus ; ceramidiis (parvulis) sessilibus ovato-urceolatis 

 ore promimilo ; siichidiis ovato-lanceolatis acuminatis. 



Dasya hapalathrix, Harv. Alg. Austr. Exsic. n. 201. Harv. in Hook. Fl. 

 Tasm. V. 2. p. 301. 



Hab. Port Phillip Heads, W. H. H. Georgetown, Tasmania, B. Gunny 

 Rev. I. Fereday. Abundantly at Point Eapid, in the Tamar, W. H. H' 

 Geogu. Distr. South coast of Australia. Tasmania. 



Descr. Root discoid. Frond 3-6 feet long, one or two lines in diameter, with a 

 linear-lanceolate general outline, not perfectly distichous : with apercm-rent, 

 glabrous and glossy, opaque stem, set at intervals of one or two inches 

 with lateral branches, the lower and middle ones of which are a foot long, 

 the upper gradually shorter, all somewhat attenuated at base, and glabrous 

 and inarticulate like the stem. These branches are closely set with sub- 

 spirally inserted, alternate, slender secondary branches, which sometimes 

 bear a third and fourth series, sometimes only a third. The latter series 



