Ser. Ehodosperme^. ram. Cry^^tonemiace <2 



Plate LXVIL 

 KOREA HALYMENIOIDES, Harv. 



Gen. Chaii. Frond fleshy-membranous, piano-compressed, composed of 

 three strata of cells ; the medullary stratum, of large, empty, thin- 

 walled cells (often ruptured) ; the intermediate, of several rows of 

 smaller, coloured, angular cells ; the cortical, of vertical, dichotomous, 

 moniliform filaments, set in gelatine. Fructification : 1, favellce 

 within a proper external pericarp crowned with spines, and opening 

 by a pore, attached to a basal placenta, invested with cobwebby inter- 

 woven filaments, and containing angular spores; 2, cruciate tetra^ 

 spores, dispersed among the filaments of the cortical stratum.' — Horea 

 {Harv.), in honour of the Rev.W. S. Hore, an accomplished naturalist. 



Frons carno&o-memlranacea, plano-compressa, ex strath tribus celhdarum compo- 

 sita ; stratum medidlare cellidis niaximis inanlbus demnm saipe ruptis, interme- 

 dium cellulis pluriseriatis nwiorihus coloratis, corticale fitis rtioniliformibus ver- 



. ticalibus dichotomis muco coJiibitis formatum. Frnct. : 1, favellce intra pe?'i- 

 carpium externum apice spinis coronatum poro pertusmn, ad placentam basalem 

 affixcB, fdis aracJinoideis laxe circumdatce, sporas conglobatas augulares foventes ; 

 3, tetrasporce spars<s, ci'uciatim divisce. 



HoREA kalymenioides ; frond dichotomous, rose-red, membranaceous ; the 

 segments attenuate, decompound-pinnate, pinnse and pinnules slender, 

 divaricate, patent, attenuate, acute, sometimes inosculating; concep- 

 tacles 4-5-horned, very numerous. 



H. halymenioides ; fronde dicJiotoma v. vage divisa rosea getatinoso-mem- 

 branacea ; laciniis attemiatis decomposito-pinnatis ; pinnis pinnidisque diva- 

 ricato-patentibus attenuatis acutis nunc spurie anastomosantibus, pinmdis 

 setaceis. 



HoREA halymenioides, Harv. in Trans. R.I. Acad. v. 22. p. 555; Alg. 

 Austr. Exsic. w. 437. 



Hab. Cast up from deep water, after storms. Fremantle, common, 

 r. H. E., G. Clifton. King George's Sound, JF. H. E. 



Geogb. Distr. West and south-west coasts of Australia. 



Descr. Fronds densely tufted, 6-8 inches long, polymorphous, excessively vari- 

 able in the amount of ramification. The primary division of the frond is 

 dichotomous, and is often very regularly forked, the laciniae varying in 

 breadth from 2-4 lines, and tapering gradually to the apex. Sometimes 

 the margin of this forked frond is perfectly simple and entire ; but more 

 frequently it emits laterally pinnate lacinulee, which gradually lengthen and 

 become again pinnulate with greater or less regularity. All the divisions 



