BY JOHN SHIRLEY, B.SC. 



5 



PART. II. 



Series IV. — Phyllodei, Nyl. 



Thallus foliaceoas, depressed, lobed or laciniate, with a 

 fibrous pith. Apothecia peltate or discoid, with or without 

 a thalline border. Spores various. Paraphyses distinct or 

 indistinct. Spermatid shortly acicular or slenderly cylindri- 

 cal, straight, narrower in the middle. 



Tribe X. — Parmeliei, Nyl. 



Thallus dilated, raiely subterete or shrubby, c sually laciniate- 

 lobate. Apothecia with a thalline border ; spores ellipsoid, 

 colourless, simple; paraphyses indistinct 



I. — Parmelia. Ach. 



Thallus spreading from the centre, usually foliaceoas, mem- 

 branaceous or coriaceous, laciniate or lobed, rarely with 

 terete fistulous lobes, upper surface usually shining ; internal 

 substance of matted fibrils, under surface generally rhizinose. 

 Apothecia scattered, often shining, scatellate, sessile or 

 raised, superficial, varying in colour, and not concolorous with 

 the thallus ; margins at first closed or connivent ; paraphyses 

 not separate ; spores ellipsoid, colourless, simple. Sperma- 

 gonia innate ; spermatia usually acicular ; sterigmata 2 — 5 

 articulated. 



A. Hyporhizia, Cromb. — Thallus with rhizinae beneath, 

 a. Glaucescentes. 



* Medulla yellow — at least the lower layer. 



1. P. Brisbaniensis, Stirton (K— C— ). 



Thallus somewhat appressed, c/ustaceous-foliaceous, with 

 Sn. pale a-iy bli.e grey lacinia?, drying stone c .lour, not glazed, 

 here and there isidioid (K golden yellow), older forms 

 farinose ; beneath black, rather rough, bate, here and there 

 sparingly supplied with short rhizina?, circumference nut- 



