1)V JOHN SHIRLEY. B.SC. 83 



cartilaginous. Colour of thallus black, brown, dull green, 

 &c. Whole substance seeming to consist of medullary 

 tissue confused with the cortical and gonimic. Gonimia 

 traversing the thallus as simple tubular threads or moniliform 

 strings. Apothecia lecanorine, rufescent. Spores in eight?, 

 simple or variously divided. 



* Spores simple. 



0. byrsinum, Ach. 



Thallus plumbeo-cinerascent, elongate-lobate, lobes radi- 

 ating, crenate-incised ; young lobes beautifully netted 

 reined, slightly rugulose ; whole plant to 2 in. in diameter 

 or more. Apothecia '2 — 8*5 m.m. in diameter, rufous, flat 

 or somewhat concave ; margin thalline, tumid, raised, rugose ; 

 spores simple, broadly oval, with a thick hyaline sp ►re r Coat, 



n. -015 - -016 x -001) - *012 nun. Paraphyses linear, closely 

 agglutinated, tips slightly dilated, brown. Hymeftial 

 gelatine with iodine candescent. 

 Syn . — Diclmdium hyrsinum, Ach. 



Hub. — Common on mosses and trunks of trees, Taylor's 

 Range Rosewood, Tambour iue, <fec. 



* Spores <5-septate. 



C. furvuiu, Ach. 



Thallus membranaceous, granulate, plicate-undulate, macro 

 — or microphylline, dark fuscous green or nigro-oUvaceous ; 

 the lobes entire or crenaie, decumbent or ascending, often 

 imbricately arranged or closely crowded, sometimes granulose 

 on both surfaces. Apothecia scutellate, llattish, dark-brown, 

 sometimes largisli, turgid, conglomerate : thalline margin 



,1 entire. Thallus with iodine blood-red. Spores 8. colour- 

 less, ovoid or ellipsoid, 3-septate, irregularly morali-locular. 



Syn. — Collema rupestre v. furvum : C tunseforme, Ach. 



Hah. — Main Range, on rocks. 



* ::f * Spores pluri-septate. 



C nigrescens, Hmte. 



, Thallus black-green, thin, membranaceous, submonophyllous, 

 orbicular, depressed, rotund ate-lobate ; lobes radiate, rugoso- 



