Keys to the macrolichens and checklist of the lichens and ...

6b. Thallus grey or brown, placodioid or crustose; rhizohyphae short and dense, not
protruding beyond the thallus lobes, or forming a thick cushion; alpine................. 8
7a. Thallus lobes crenulate ......................................................................P. molkenboeri
7b. Thallus lobes linear, ca. 1 mm wide ............................................................ P. tenuis
8a. Thallus grey-blue, nearly crustose, resting on a thick cushion of rhizohyphae.
.....................................................................................................................P. andina
8b. Thallus grey-brown, placodioid, with short, dense rhizohyphae underneath.
.............................................................................................................. P. rubiginosa
Parmeliella Key (after Jørgensen, P.M. & H.J.M. Sipman 2006. The lichen family
Pannariaceae in the montane regions of New Guinea. Journal of the Hattori Botanical
Laboratory 100: 695-720.):
1a. Thallus with yellow or orange colours in the medulla............................................. 2
1b. Thallus grey-brown or -blue, without yellow/orange medulla ................................ 3
2a. Thallus brown, with orange medulla, often fertile, on black, crustose prothallus;
spores citriform ............................................................................. P. endoferruginea
2b. Thallus grey with a yellowish hue, with yellow medulla, rarely fertile, sparingly
isidiate; on black, spongy prothallus...........................................................P. flavida
3a. Thallus foliicolous, very thin (less than 100 μm) .................................... P. foliicola
3b. Thallus not foliicolous, thicker (over 100 μm) ........................................................ 4
4a. Apothecia with thalline margin................................................................................ 5
4b. Apothecia only with proper margin ....................................................................... 11
5a. Thallus very thick (200-400 μm) with prominent brownish rhizohyphae.
...........................................................................................................P. pannarioides
5b. Thallus thinner (under 200 μm) with blackish or without rhizohyphae .................. 6
6a. Thallus flat, without ascending lobes, resting on a prominent prothallus ............... 7
6b. Thallus cushion-forming, with at least some ascending lobes/squamules,
prothallus less prominent ....................................................................................... 10
7a. Thallus with isidia.................................................................................................... 8
7b. Thallus without isidia............................................................................................... 9
8a. Isidia globose to gnarled ....................................................................P. brisbanensis
8b. Isidia cylindrical...................................................................................... P. papillata
9a. Thallus large (often over 5 cm diam.), on spongy prothallus; lowland ... P. mariana
9b. Thallus smaller (not more than 5 cm diam.), on crustose prothallus; montane.
..................................................................................................................P. montana
10a. Thallus coralloid, usually shiny, in dense cushions..................................... P. nitida
10b. Thallus squamulose, dull, in loose cushions......................................P. polyphyllina