Scr. RiiODOSPERMEiE. Fam. Crypionemiacea. 



Plate CXCIV. 



GYMNOGONGRUS FOLIOSUS, Harv. 



Gen. Chae. Frond coriaceous, somewhat fleshy, nearly filiform or flat, 

 dichotomous, fastigiate, formed of two strata of cells; the medullary 

 stratum of roundisli-aiigular cells, the cortical of moniliform, vertical 

 filaments, set in gelatine. Fructification : 1, immersed conceptacles, 

 more or less prominent, composed of several nucleoli of spores aggre- 

 gated in a compound nucleus; 2, external nemathecia (or warts), 

 formed of radiating filaments, whose cells at maturity are changed 

 into cruciate tetraspores. — Gymnogongrus {Mart.), from <yvixvo<t, 

 naked, and yoyypo^, a wart-like excrescence on trees. 



Frons cariioso-coriacea, teretiiisctda aut plana, dichotomo-fastigiata, stratls 

 duobus cellularnm consUtuta ; strata medullari cellulis rottmdato-amjulails, 

 corticali fills mordl'iformihus verticalibiis muco cohibitis contexto. Fritct. : 

 1, cystocarpia immersa, plus minus prominentia, clansa, nucleolis sporarum 

 pluribns in niicleurn compositum aggregatis constantia ; 2, nemathecia externa, 

 fills radlantibus demum. in tetrasporas crucidtas solutis constltula. > 



Gymnogongrus foliosus ; frond tufted, stipitate, flabelliform, flat and 

 membranous, dichotomo-fastigiate, proliferous from the disc and mar- 

 gin ; segments linear ; axils patent ; apices divaricate, attenuate ; 

 conceptacles mostly in the proliferous leaflets, solitary, prominent to 

 both surfaces. 

 G. foHosus ; fronde ca^spltosa stlpltata flabelllformi plana membranacea dicho- 

 tomo-fastigiata e marglne et disco folioso-prol if era ; segmentls linearlbus; axlllls 

 paten tlbus ; aplclbiis dlvaricatis attenuatls ; cystocarpils Srsplsslme in follolls 

 proUferis immersls soUtarlis in utraque paglna prominentlbns. 



Gymnogongrus foliosus, Harv. Alg. Austr. Exsic. n. 396. 



Hab. Port Philhp Heads, and Western Port, abundant, W. 11. H. 



Geogr. Diste. Southern coast of Australia. 



Descr. 7^00^ a small disc. Fronds densely tufted, 4-G inches higli, 3-5 in the 

 expansion of the segments, on a stipes -^-li inches high, quite Hat, several 

 times (liehotomous, tlabellitorm and more or less fastigiate, all the segments 

 spreading widely. The frond is seldom quite bare of ramenta or pro- 

 lifeious leaflets; commonly both margin and disc produce an abundance of 

 linear, cuneate, or obovate, small, leaf-like processes. Some individuals 

 iiuve the segments 3-4 lines wide ; in others they are scarcely a line in 

 breadth ; the narrower ones usually have the a])iccs attenuate to a sleiuler 

 point. Couceptucles occur in the ramenta or leailels usually neur the tip ; 

 but one nenerallv is found on each ramentura. The colour is a dark and 



