[Labia entire, apically carbonized]

Ascospores transversely septate; thallus ecorticate, bluish

= Graphis glaucescens Fée

Ascospores muriform, small (13-26 x 8-15 µm), 4-8 per ascus

= Graphis dimidiata Vain.

Ascospores muriform, large (60-75 x 15-30 µm), 1 per ascus

= Graphis pseudoserpentina ad interim

[Labia entire, laterally carbonized]

Hymenium inspersed; ascospores muriform, large, 1 per ascus

= Graphis hiascens (Fée) Lücking & Sipman

Hymenium inspersed; ascospores transversely septate, small, 8 per ascus GO

Hymenium clear; norstictic or stictic acid GO

Hymenium clear; no substances GO

[Labia entire, completely carbonized]

Hymenium inspersed GO

Hymenium clear; ascospores muriform; lirellae sessile and lacking thalline cover, Opegrapha-like or with orange, K+ dark pink pruina GO

Hymenium clear; ascospores muriform; lirellae erumpent to sessile, with thalline cover GO

Hymenium clear; ascospores transversely septate; lirellae sessile and lacking thalline cover, Opegrapha-like GO

Hymenium clear; ascospores transversely septate, large (> 60 x 10 µm); lirellae prominent, with thalline cover or yellowish pigment GO

Hymenium clear; ascospores transversely septate, small (< 50 x 10 µm); lirellae immersed to prominent, with thalline cover GO

[Labia striate, apically carbonized]

Ascospores muriform; lirellae with thalline cover except apex of labia

= Graphis paraserpens Lizano & Lücking

Ascospores submuriform; lirellae lacking thalline cover except at base

= Graphis paradisserpens Sipman & Lücking

Ascospores transversely septate; lirellae lacking thalline cover except at base

= Graphis proserpens Vain.

[Labia striate, laterally carbonized]

Ascospores muriform GO

Ascospores transversely septate; substances present GO

Ascospores transversely septate; no substances GO

[Labia striate, completely carbonized]

Hymenium inspersed GO

Hymenium clear; ascospores (sub)muriform, large (> 65 µm long); labia up to apex with thalline cover or orange, K+ dark pink pruina GO

Hymenium clear; ascospores muriform, medium-sized (30-60 µm long); labia lacking thalline cover except laterally or at base, black GO

Hymenium clear; ascospores transversely septate, medium-sized (30-70 µm long); labia lacking thalline cover except laterally or at base, black GO

[Labia entire, laterally carbonized]

Hymenium inspersed; ascospores muriform, large, 1 per ascus

= Graphis hiascens (Fée) Lücking & Sipman

Hymenium inspersed; ascospores transversely septate, small, 8 per ascus GO

Hymenium clear; norstictic or stictic acid GO

Hymenium clear; no substances GO