Ser. RHODOSPEiiMEiE. Fatn. Cryptonemiacece. 



Plate CC. 



MYCHODEA TERMINALIS, iiarv. 



Gen. Char. Frond filiform, cartilaginous, alternately decompound, den- 

 droid, composed of three strata ; the medullary stratum of longitudinal 

 and excurrent, interwoven and anastomosing filaments ; the inter- 

 mediate of large, roundish, empty cells, smaller outwards ; the cortical 

 of minute, coloured, vertically seriated cellules. Fructification : 1, 

 external, lateral, or terminal concejjtacles, containing, within a thick- 

 walled pericarp, a comijound nucleus, consisting of many confluent 

 nucleoli, or masses of roundish-angular spores ; 2, zonate tetraspores, 

 dispersed in the branches and ramuli. — Mychodea {Harv.), from 

 fiv^o^;, an internal cavity, or secret chamber, alluding to the large 

 empty cells of the intermediate stratum of the frond. 



Frons fiJiforniis, cartilaginea, alterne decomposita, dendroidea, stratis trihiis con- 

 texta ; strata medullari fills lomjitudinalibus et excnrrentibus intertextis ana- 

 stomosantlI)us, intermedio cellnlis maximis rotundatis vacuis extiis sensim mi' 

 norll)us, corticali cellulis minutis . coloratis verticaliter seriatis composite. 

 Fruct. : \,favellidia intra pericarpiiim externum later ale v. terminate excepta ; 

 2, tetrasporcB zonatim dlviste, sparsa, frondi immerscB. 



Mychodea terminalis ; frond terete fleshy-membranous, decompoundly 

 much branched ; branches patent, alternate and scattered, multifid or 

 subdichotomous, divided, flexuous ; axils rounded ; ramuli subulate, 

 simple or divided ; cystocarps terminating the ramuli. 



M. terminaHs ; fronde terete carnoso-membranacea decomposite ramosissima ; ra- 

 mis patentibus alteruis sparsisve multifidis it. suhdichotome divisis fiexuosis ; 

 axillis rotundatis ; ramulis subulatis simplicibus v. divisis ; cystocarpiis ramulos 

 (fere omnesj terminantibus. 



Mychodea teiToinalis, Harv. Alg. Exsic. Austr. n. 413 ; Ft. Tasm. v. 2. p. 323. 



IIab. Georgetown, Tasmania, R. Gunn, W. H. II. Mouth of Snowy Eiver, 



Victoria, Dr, Mueller. 

 Geogr. Distr. Tasmania, South coast of Australia. 



Descr. Roots discoid. Fronds solitary, 12 inches long or more, and as much 

 in the spread of the branches, terete, half a line to a line in diameter, very 

 much branched and nearly of equal diameter in all parts. Branches alternately 

 decompound, patent or divaricate, slightly narrowed at their insertion, un- 

 equal, slightly or much divided. Ramuli patent, subdistant, long or short, 

 often very short, nearly horizontal in the cystocarpic, erecto-patent and acute 

 in the tetrasporic individuals. Cystocarps oval, terminating almost every 



