• Species: Fellhaneropsis vezdae (Coppins & P. James) Sérus. & Coppins
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Flavocetraria cucullata (Bellardi) Kärnefelt & A. Thell
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• harilik tundrasamblik

• Species: Flavocetraria nivalis (L.) Kärnefelt & A. Thell
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• lumi-tundrasamblik

• Species: Flavoparmelia caperata (L.) Hale
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• harilik kitsesamblik

• Species: Fulgensia bracteata (Hoffm.) Räsänen
• Remark: see: Gyalolechia bracteata
• Fungus type: lichenized
• Treatment in Estonia: synonym
• harilik särasamblik

• Species: Fulgensia fulgens (Sw.) Elenkin
• Remark: see: Gyalolechia fulgens
• Fungus type: lichenized
• Treatment in Estonia: synonym
• hõlmik-särasamblik

• Species: Fuscidea arboricola Coppins & Tønsberg
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Fuscidea cyathoides (Ach.) V. Wirth & Vězda
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Fuscidea lygaea (W. Mann) V. Wirth & Vězda
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: doubtful extinct

• Species: Fuscidea praeruptorum (Du Rietz & H. Magn.) V. Wirth & Vězda
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Fuscidea pusilla Tønsberg
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Fuscopannaria leucophaea (Vahl) P.M. Jørg.
• Remark: see: Vahliella leucophaea; earlier also under Pannaria leucophaea
• Fungus type: lichenized
• Treatment in Estonia: synonym
• harilik kaljusamblik

• Species: Graphis scripta (L.) Ach.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• harilik kirisamblik

• Species: Graphium aphthosae Alstrup & D. Hawksw.
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Graphium samogiticum Motiej. & Alstrup
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Gyalecta flotovii Körb.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Gyalecta geoica (Wahlenb. ex Ach.) Ach.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Gyalecta jenensis (Batch) Zahlbr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Gyalecta subclausa Anzi
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Gyalecta truncigena (Ach.) Hepp
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Gyalecta ulmi (Sw.) Zahlbr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• jalaka-kauss-samblik

• Species: Haematomma ochroleucum (Neck.) J.R. Laundon var. ochroleucum
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Haematomma ochroleucum var. porphyrium (Pers.) J.R. Laundon
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Hertelidea botryosa (Fr.) Printzen & Kantvilas
• Remark: earlier under Lecidea botryosa (Fr.) Th. Fr.
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Heterodermia speciosa (Wulfen) Trevis.
• Remark: excluded as misidentification: re-identified as Physcia caesia
• Fungus type: lichenized
• Treatment in Estonia: misidentification
• nõudlik huulsamblik

• Species:
• Remark:
• Fungus type:
• Treatment in Estonia: