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

11a. Thallus with enlarged, radiating, marginal lobes............................P. pindaundensis
11b. Thallus of more or less equal squamules ............................................................... 12
12a. Thallus nearly crustose with neatly incised lobes resting on blackish, crustose
prothallus............................................................................................... P. philippina
12b. Thallus distinctly squamulose, prothallus irregular or poorly developed.............. 13
13a. Thallus with numerous tiny lobules in lace pattern, apothecia with thick,
permanent proper margin (>100 μm), spores with thin, warty perispore.
............................................................................................................... P. laceroides
13b. Thallus mostly without lobules, forming flat rosettes, apothecia with thin proper
margin, often excluded at maturity (