• Species: Cladonia chlorophaea (Flörke ex Sommerf.) Spreng.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• tera-porosamblik

• Species: Cladonia coccifera (L.) Willd.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• punapea-porosamblik

• Species: Cladonia coniocraea (Flörke) Spreng.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• naaskel-porosamblik

• Species: Cladonia convoluta (Lam.) Anders
• Remark: included in Cladonia foliacea
• Fungus type: lichenized
• Treatment in Estonia: included in other taxon
• vask-porosamblik

• Species: Cladonia cornuta (L.) Hoffm.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• sarv-porosamblik

• Species: Cladonia crispata var. cetrariiformis (Delise) Vain.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kähar porosamblik

• Species: Cladonia crispata (Ach.) Flot. var. crispata
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kähar porosamblik

• Species: Cladonia cryptochlorophaea Asahina
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• peit-porosamblik

• Species: Cladonia cyanipes (Sommerf.) Nyl.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• sinijalg-porosamblik

• Species: Cladonia decorticata (Flörke) Spreng.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kooretu porosamblik

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