Ser. Riiodospermeje. Fam. Gelidiacece. 



Plate XXIII. 

 HYPNEA EPISCOPALIS, Hook. ftl. et Harv. 



Gen. Char. Frond terete or coinpresso-plane, irregularly much branched, 

 and set with awl-shaped rainuli, composed of three strata of cells ; the 

 medullary of a few slender, longitudinal filaments (sometimes want- 

 ing) ; the intermediate of oblong, angular, hyaline cells; the cortical of 

 one or more rows of very minute, coloured cellules. Fructiji cation : 1, 

 hemispherical conceptacles, containing, within a thickish pericarp, se- 

 veral clusters of pedicellate spores, affixed to slender anastomosing 

 filaments; 2, zonate tetraspores, lodged in swollen ramuli. — Hypnea 

 {Lamour.) , from Hypnum, a genus of Mosses ; because these plants 

 are finely branched, like Mosses. 



Frons teres v. plano-compressa , ramosissima, ramidis subulatis obsessa, siratls 

 trlbus contexta ,• strato medullarl cell/dls filiformibus elongatls panels, inter- 

 medio cellulis oblongls majorlbus angulatis hyalinls plurlserlatis, cortlcali 

 cellulis minutis color atis constante. Fruct. : 1, cystocarpla liemlsphcp.rlca, in- 

 tra pericardium liemlsphaerlcum crassum fasclculos plures sporarum pedicel- 

 latarum ad fila retlculato-anastomosantla affixarum fovenlia ; 2, tetrasporce 

 zonatim dlvlsae, in ramulos turgidos evoluta. 



Hypnea episcopalis ; root branching; frond terete, blood-red, elongate, 

 much branched; branches virgate, subsimple, attenuate, densely set 

 with short secondary-branches, and erect, subulate ramuli, toward 

 the base bearing several long, naked branchlets, incrassated and 

 hooked at the extremities ; conceptacles sessile on the upper face of 

 fusiform, simple, pateiu^ ramuli ; tetraspores in pod-like, pedicellate 

 and mucronate, incrassated ramuli. 



H. episcopalis ; radice ramosa ; fronde tereti sangulnea elata ramosissima ; 



ramis vlrgatls elongatls simplicibus attenuatis, ramis minorlbus (saplas brevlbus) 



ramulisque erectls subulatis minutis plus minus obsessls, ramis inferlorlbus 



longe nudls aplce incrassatis et hamatis ; ramulls capsuliferls simplicibus fusi- 



formlbus, sporiferls basi et aplce Jdlformibus medio incrassatis. 



Hypnea episcopalis, Hook. fil. et Harv. Lond. Journ. v. 6. p. 406. Kiitz. 

 Sp. Jig. p. 760. J. Ag. Sp. Alg. p. 433. Harv. in Trans. 11. I. Acad, 

 v. 22. ;;. 552 ; Harv. Alg. Austr. n. 341. 



Hab. On rocks, at low-water mark. Frequent on the western and southern 



shores of Australia, in several places. Also in Tasmania. 

 Geogr. Distr. As above. 



Descr. Root much branched. Fronds 10-12 inches long or more, twice as 

 thick as hog's bristle below, attenuated upwards, terete, generally with a 



