Ser. Rhodosperme^. Fam. RhodT/meniacece. 



Plate CLXVI. 



ARESCHOUGIA CONFERTA, Haw. 



Gen. Char. Frond compressed or filiform, vaguely branched, composed of 

 an articulated axial filament, and three (rarely but two) strata of cells ; 

 medullar^/ stratum consisting of longitudinal, anastomosing, inter- 

 woven filaments ; the intermediate (sometimes absent) of several rows 

 of roundish, coloured cells ; the cortical of minute, vertically seriated 

 cellules. Fructification : 1, conceptacles immersed in the frond, very 

 rarely external, suspended among the filaments of the medullary stra- 

 tum, and enclosed in a network of filaments, opening by an external 

 pore, and containing moniliform strings of spores, radiating fi'om a 

 central placenta ; spores roundish ; 2, zonate tetraspores, formed on 

 the cortical stratum of the ramuli. — Areschougia {Rarv.), in honour 

 of Dr. J. E. Areschoug, Professor of Botany at Upsal, a distinguished 

 algologist. 



Frons compressa v.filiformis, vage ramosa, immerse costnta, efilo centraU articn- 

 lato et stratis fere tribus cellularum constitiita. Stratum medidlare e Jllis 

 articulatis longitudlnallbus nnastomosantibus intertextis ; intermedium (nunc 

 deficient) e celltdis rotiindatis majusculis pluriserlatis, corticate e ceUulis mi- 

 nimis verticalibus formatiim. Fruct. : 1, cystocarpia fronde immersa, raris- 

 sime externa, inter /I'ia strati medullaris suspensa, reticulo filornm velata, 

 carpostomio demum aperta, fila sporifera moniliformia a placenta centraU 

 emissa continentia ; sporce subrotundce ; 2, tetrasporce zonatim divisce, inter 

 cellulas corticales ramulorum nidulantes. 



Areschougta conferta ; frond terete at base, compressed and flattened 

 upwards, obscurely midribbed, densely much branched, fastigiate; 

 branches narrow-linear, pinnately decompound, entire ; conceptacles 

 external, marginal, globose. 



A. conferta ; fronde basi tereti sursum compresso-applanata et snhcostata dense 

 ramosissima fastigiata ; ramis nnguste liuearibus pinnatiin decompositis mar- 

 gine integerrimis ; cystocarpiis externis marginalibus globosis. 



Hab. Swan River, Mylne, W. 11. H., G. Clifton. South Australia, Br. 



Curdle. Warnambool, //. Watts. 

 Geogr. Distr. Western and southern coasts of Austraha. 



Desck. Foot an expanded calUis. Fronds tufted, 4-6 inches high, somewhat 

 flabelliform in outline, fastigiate, much-branched from the base, and very 

 dense. The branches and their divisions are a line or less in breadth, taper- 

 ing to the base, linear throughout their greater length, and generally blunt 

 at the apex. Except near the base the narrow frond is everywhere ilattened; 



