Lichens C

Calicium Calicium abietinum
  Calicium corynellum
  Calicium glaucellum
  Calicium salicinum
  Calicium viride
Callome Callome multipartitum
Calogaya Calogaya arnoldii
  Calogaya decipiens
  Calogaya pusilla
Caloplaca Caloplaca alociza - see Pyrenodesmia alociza
  Caloplaca aractina [current taxonomic position unclear]
  Caloplaca arnoldii - see Calogaya arnoldii
  Caloplaca arcis - see Flavoplaca arcis
  Caloplaca arenaria - see Rufoplaca arenaria
  Caloplaca aurantia - see Variospora aurantia
  Caloplaca austrocitrina - see Flavoplaca austrocitrina
  Caloplaca caesiorufella [current taxonomic position unclear]
  Caloplaca calcitrapa - see Flavoplaca calcitrapa
  Caloplaca ceracea [current taxonomic position unclear]
  Caloplaca cerina
  Caloplaca cerina var. chloroleuca - see Caloplaca stillicidiorum
  Caloplaca cerinelloides - see Athallia cerinelloides
  Caloplaca chalybaea - see Pyrenodesmia chalybaea
  Caloplaca chlorina
  Caloplaca chrysodeta - see Leproplaca chrysodeta
  Caloplaca citrina - see Flavoplaca citrina
  Caloplaca coralliza - see Blastenia coralliza
  Caloplaca crenularia - see Blastenia crenularia
  Caloplaca crenulatella - see Xanthocarpia crenulatella
  Caloplaca dalmatica [current position uncertain]
  Caloplaca decipiens - see Calogaya decipiens
  Caloplaca demissa [related to Pyrenodesmia but position uncertain]
  Caloplaca dichroa - see Flavoplaca dichroa
  Caloplaca diffusa - see Xanthocarpia diffusa
  Caloplaca ferruginea - see Blastenia ferruginea
  Caloplaca flavescens - see Variospora flavescens
  Caloplaca flavocitrina - see Flavoplaca flavocitrina
  Caloplaca flavovirescens - see Gyalolechia flavovirescens
  Caloplaca haematites [current position uncertain]
  Caloplaca holocarpa - see Athallia holocarpa
  Caloplaca lactea - see Xanthocarpia lactea
  Caloplaca limonia - see Flavoplaca limonia
  Caloplaca littorea [current position uncertain]
  Caloplaca luteoalba - see Cerothallia luteoalba
  Caloplaca marina - see Flavoplaca marina
  Caloplaca maritima - see Flavoplaca maritima
  Caloplaca marmorata - see Xanthocarpia marmorata
  Caloplaca neotaurica [current position uncertain]
  Caloplaca oasis - see Flavoplaca oasis
  Caloplaca obscurella [current position uncertain]
  Caloplaca ochracea - see Xanthocarpia ochracea
  Caloplaca phlogina - see Polycauliona phlogina
  Caloplaca pyracea - see Athallia pyracea
  Caloplaca saxicola [a misunderstood species of the Calogaya group that may not occur in GB&I]. At least most collections are Calogaya pusilla.
  Caloplaca soralifera [related to Pyrenodesmia but of uncertain position]
  Caloplaca stillicidiorum
  Caloplaca teicholyta [related to Pyrenodesmia but of uncertain position]
  Caloplaca thallincola - see Variospora thallincola
  Caloplaca ulcerosa [current position uncertain]
  Caloplaca variabilis - see Pyrenodesmia variabilis
  Caloplaca verruculifera - see Polycauliona verruculifera
  Caloplaca vitellinula - see Athallia vitellinula
  Caloplaca xantholyta - see Leproplaca xantholyta
Calvitimela Calvitimela aglaea
Candelaria Candelaria pacifica
Candelariella Candelariella aurella
  Candelariella coralliza
  Candelariella medians
  Candelariella reflexa
  Candelariella superdistans
  Candelariella vitellina
Carbonea Carbonea aggregantula
  Carbonea vorticosa
Catapyrenium Catapyrenium psoromoides
Catillaria Catillaria atomarioides
  Catillaria chalybeia
  Catillaria fungoides
  Catillaria lenticularis
  Catillaria nigroclavata
  Catillaria stereocaulorum
Catinaria Catinaria atropurpurea
Catolechia Catolechia wahlenbergii
Cavernularia Cavernularia hultenii
Cerothallia Cerothallia luteoalba
Cetraria Cetraria aculeata
  Cetraria islandica
  Cetraria muricata
  Cetraria sepincola
Cetrariella Cetrariella commixta
  Cetrariella delisei
Chaenotheca Chaenotheca brachypoda
  Chaenotheca brunneola
  Chaenotheca chrysocephala
  Chaenotheca ferruginea
  Chaenotheca trichialis
Chaenothecopsis Chaenothecopsis nigra
Chrysothrix Chrysothrix candelaris
  Chrysothrix flavovirens
Circinaria Circinaria caesiocinerea
  Circinaria calcarea
  Circinaria contorta subsp. contorta
  Circinaria contorta subsp. hoffmanniana
  Circinaria leprosescens
Cladonia Cladonia angustiloba
  Cladonia arbuscula
  Cladonia bellidiflora
  Cladonia borealis
  Cladonia caespiticia
  Cladonia callosa
  Cladonia cervicornis subsp. cervicornis
  Cladonia cervicornis subsp. verticillata
  Cladonia chlorophaea
  Cladonia ciliata
  Cladonia coniocraea
  Cladonia diversa
  Cladonia fimbriata
  Cladonia floerkeana
  Cladonia foliacea
  Cladonia furcata
  Cladonia gracilis
  Cladonia humilis
  Cladonia incrassata
  Cladonia macilenta
  Cladonia ochrochlora
  Cladonia parasitica
  Cladonia pocillum
  Cladonia polydactyla
  Cladonia portentosa
  Cladonia pyxidata
  Cladonia ramulosa
  Cladonia rangiferina
  Cladonia rangiformis
  Cladonia squamosa
  Cladonia strepsilis
  Cladonia subcervicornis
  Cladonia subulata
  Cladonia sulphurina
  Cladonia symphycarpia
  Cladonia uncialis subsp. biuncialis
Clauzadea Clauzadea immersa
  Clauzadea metzleri
  Clauzadea monticola
Cliostomum Cliostomum griffithii
  Cliostomum subtenerum
Coccotrema Coccotrema citrinescens
Collema Collema auriforme - see Lathagrium auriforme
  Collema crispum - see Blenothallia crispa
  Collema cristatum - see Lathagrium cristatum
  Collema dichotomum - see Lathagrium dichotomum
  Collema flaccidum
  Collema furfuraceum
  Collema fuscovirens - see Lathagrium fuscovirens
  Collema glebulentum
  Collema latzelii - see Lathagrium latzelii
  Collema multipartitum - see Callome multipartitum
  Collema polycarpon - see Enchylium polycarpon
  Collema subflaccidum
  Collema tenax
Collemopsidium Collemopsidium angermannicum
  Collemopsidium foveolatum
  Collemopsidium halodytes
Coniocarpon Coniocarpon cinnabarinum
  Coniocarpon fallax
Cornicularia Cornicularia normoerica
Corticiruptor Corticiruptor abeloneae
Cresponea Cresponea premnea
Cryptodiscus Cryptodiscus gloeocapsa
Cyrtidula Cyrtidula quercus

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith