- Cortinarius boletiformis — likely to require a low level of donation
- Cortinarius bombycinus — likely to require only a small donation
- Cortinarius bonamei — likely to require a low level of donation
- Cortinarius bongardiodor — likely to require a low level of donation
- Cortinarius bonii — likely to require a low level of donation
- Cortinarius borealis — likely to require a low level of donation
- Cortinarius boreasensis — likely to require a low level of donation
- Cortinarius boreicyanites — likely to require a low level of donation
- Cortinarius boreidionysae — likely to require a low level of donation
- Cortinarius boreotrichus — likely to require a low level of donation
- Cortinarius borgsjoeensis — likely to require a low level of donation
- Cortinarius boudieri — likely to require a low level of donation
- Cortinarius boulderensis — likely to require a low level of donation
- Cortinarius bovarius — likely to require a low level of donation
- Cortinarius bovinaster — likely to require a low level of donation
- Cortinarius bovinatus — likely to require a low level of donation
- Cortinarius bovinellus — likely to require a low level of donation
- Cortinarius bovinoides — likely to require a low level of donation
- Cortinarius bovinus — likely to require a low level of donation
- Cortinarius boy-scoutorum — likely to require a low level of donation
- Cortinarius boyacensis — likely to require a low level of donation
- Cortinarius brachyspermus — likely to require a low level of donation
- Cortinarius braendlei — likely to require a low level of donation
- Cortinarius brassicolens — likely to require a low level of donation
- Cortinarius bresadolae — likely to require a low level of donation
- Cortinarius bresadolanus — likely to require a low level of donation
- Cortinarius brevipes — likely to require a low level of donation
- Cortinarius breviradicatus — likely to require a low level of donation
- Cortinarius brevisporus — likely to require a low level of donation
- Cortinarius brevissimus — likely to require a low level of donation
- Cortinarius bridgei — likely to require a low level of donation
- Cortinarius britzelmayrii — likely to require a low level of donation
- Cortinarius brondaei — likely to require a low level of donation
- Cortinarius brosselini — likely to require a low level of donation
- Cortinarius brunneiaurantius — likely to require a low level of donation
- Cortinarius brunneifolius — likely to require a low level of donation
- Cortinarius brunneo-olivaceus — likely to require a low level of donation
- Cortinarius brunneo-olivascens — likely to require a low level of donation
- Cortinarius brunneoaffinis — likely to require a low level of donation
- Cortinarius brunneocalcarius — likely to require a low level of donation
- Cortinarius brunneocoerulescens — likely to require a low level of donation
- Cortinarius brunneofulvus — likely to require a low level of donation
- Cortinarius brunneogriseus — likely to require a low level of donation
- Cortinarius brunneolimosus — likely to require a low level of donation
- Cortinarius brunneolividus — likely to require a low level of donation
- Cortinarius brunneorubripes — likely to require a low level of donation
- Cortinarius brunneotinctus — likely to require a low level of donation
- Cortinarius brunneovelatus — likely to require a low level of donation
- Cortinarius brunneovernus — likely to require a low level of donation
- Cortinarius brunneoviolaceus — likely to require a low level of donation
- Cortinarius brunneovirescens — likely to require a low level of donation
- Cortinarius brunneovulvus — likely to require a low level of donation
- Cortinarius brunneovulvus f. brunneovulvus — likely to require a low level of donation
- Cortinarius brunneus — likely to require a low level of donation
- Cortinarius bucknallii — likely to require a low level of donation
- Cortinarius bulbolatens — likely to require a low level of donation
- Cortinarius bulbopodius — likely to require a low level of donation
- Cortinarius bulbosoides — likely to require a low level of donation
- Cortinarius bulbosomustellinus — likely to require a low level of donation
- Cortinarius bulbosovolvatus — likely to require a low level of donation
- Cortinarius bulbosus — likely to require a low level of donation
- Cortinarius bulboviolascens — likely to require a low level of donation
- Cortinarius bulbulipes — likely to require a low level of donation
- Cortinarius bulliardii — likely to require a low level of donation
- Cortinarius bulliardioides — likely to require a low level of donation
- Cortinarius bundarus — likely to require a low level of donation
- Cortinarius buxiolens — likely to require a low level of donation
- Cortinarius cabrinii — likely to require a low level of donation
- Cortinarius cacaocolor — likely to require a low level of donation
- Cortinarius cacaodiscus — likely to require a low level of donation
- Cortinarius cacodes — likely to require a low level of donation
- Cortinarius cadaverolens — likely to require a low level of donation
- Cortinarius cadi-aguirrei — likely to require a low level of donation
- Cortinarius caelicolor — likely to require a low level of donation
- Cortinarius caeruleipes — likely to require a low level of donation
- Cortinarius caeruleo-ochrascens — likely to require a low level of donation
- Cortinarius caeruleoburneus — likely to require a low level of donation
- Cortinarius caeruleoeburneus — likely to require a low level of donation
- Cortinarius caeruleogriseus — likely to require a low level of donation
- Cortinarius caerulescens — likely to require a low level of donation
- Cortinarius caesibulga — likely to require a low level of donation
- Cortinarius caesiellus — likely to require a low level of donation
- Cortinarius caesiifolius — likely to require a low level of donation
- Cortinarius caesioarmeniacus — likely to require a low level of donation
- Cortinarius caesiobrunneus — likely to require a low level of donation
- Cortinarius caesiocanescens — likely to require a low level of donation
- Cortinarius caesiocinctus — likely to require a low level of donation
- Cortinarius caesiocolor — likely to require a low level of donation
- Cortinarius caesiocortinatus — likely to require a low level of donation
- Cortinarius caesioflavescens — likely to require a low level of donation
- Cortinarius caesiogriseus — likely to require a low level of donation
- Cortinarius caesiolamellatus — likely to require a low level of donation
- Cortinarius caesiolatens — likely to require a low level of donation
- Cortinarius caesionigrellus — likely to require a low level of donation
- Cortinarius caesiopallens — likely to require a low level of donation
- Cortinarius caesiopallescens — likely to require a low level of donation
- Cortinarius caesiophylloides — likely to require a low level of donation
- Cortinarius caesiostipitatus — likely to require a low level of donation
- Cortinarius caesiostramineus — likely to require a low level of donation
- Cortinarius caesius — likely to require a low level of donation
- Cortinarius caespitosus — likely to require a low level of donation
- Cortinarius cagei — likely to require a low level of donation
- Cortinarius calaisopus — likely to require a low level of donation
- Cortinarius calcareophilus — likely to require a low level of donation
- Cortinarius calcialpinus — likely to require a low level of donation
- Cortinarius caledoniensis — likely to require a low level of donation
- Cortinarius californicus — likely to require a low level of donation
- Cortinarius caligatus — likely to require a low level of donation
- Cortinarius caliginosus — likely to require a low level of donation
- Cortinarius callimorphus — likely to require a low level of donation
- Cortinarius callisteus — likely to require a low level of donation
- Cortinarius callochrous — likely to require a low level of donation
- Cortinarius calochrous — likely to require only a small donation
- Cortinarius calojanthinus — likely to require a low level of donation
- Cortinarius calopus — likely to require a low level of donation
- Cortinarius calosporus — likely to require a low level of donation
- Cortinarius calyculatus — likely to require a low level of donation
- Cortinarius calyptophaeus — likely to require a low level of donation
- Cortinarius calyptratroides — likely to require a low level of donation
- Cortinarius calyptratus — likely to require a low level of donation
- Cortinarius calyptrodermus — likely to require a low level of donation
- Cortinarius campbellae — likely to require a low level of donation
- Cortinarius campester — likely to require a low level of donation
- Cortinarius campestris — likely to require a low level of donation
- Cortinarius camphoratus — likely to require a low level of donation
- Cortinarius campinaranae — likely to require a low level of donation
- Cortinarius campoi — likely to require a low level of donation
- Cortinarius camptoros — likely to require a low level of donation
- Cortinarius canabarba — likely to require a low level of donation
- Cortinarius canaliculatus — likely to require a low level of donation
- Cortinarius candelariopsis — likely to require a low level of donation
- Cortinarius candelaris — likely to require a low level of donation
- Cortinarius candicans — likely to require a low level of donation
- Cortinarius candidus — likely to require a low level of donation
- Cortinarius candolleanoides — likely to require a low level of donation
- Cortinarius canens — likely to require a low level of donation
- Cortinarius canescens — likely to require a low level of donation
- Cortinarius caninoides — likely to require a low level of donation
- Cortinarius caninus — likely to require a low level of donation
- Cortinarius cannarius — likely to require a low level of donation
- Cortinarius canolilacinus — likely to require a low level of donation
- Cortinarius caperatoides — likely to require a low level of donation
- Cortinarius caperatus — likely to require a low level of donation
- Cortinarius capillosus — likely to require a low level of donation
- Cortinarius capitellinus — likely to require a low level of donation
- Cortinarius capraginicolor — likely to require a low level of donation
- Cortinarius capsicosmus — likely to require a low level of donation
- Cortinarius caput-medusae — likely to require a low level of donation
- Cortinarius carabus — likely to require a low level of donation
- Cortinarius carbonellus — likely to require a low level of donation
- Cortinarius carbonipes — likely to require a low level of donation
- Cortinarius carcharias — likely to require a low level of donation
- Cortinarius carminipes — likely to require a low level of donation
- Cortinarius carneinatus — likely to require a low level of donation
- Cortinarius carneipallidus — likely to require a low level of donation
- Cortinarius carneoalbus — likely to require a low level of donation
- Cortinarius carneocrassus — likely to require a low level of donation
- Cortinarius carneolus — likely to require a low level of donation
- Cortinarius carneoroseus — likely to require a low level of donation
- Cortinarius caroviolaceus — likely to require a low level of donation
- Cortinarius carpinamicus — likely to require a low level of donation
- Cortinarius carranzae — likely to require a low level of donation
- Cortinarius cartagoensis — likely to require a low level of donation
- Cortinarius cartilagineus — likely to require a low level of donation
- Cortinarius caryotis — likely to require a low level of donation
- Cortinarius cascadensis — likely to require a low level of donation
- Cortinarius casimiri — likely to require only a small donation
- Cortinarius castaneiceps — likely to require a low level of donation
- Cortinarius castaneicolor — likely to require a low level of donation
- Cortinarius castanellus — likely to require a low level of donation
- Cortinarius castaneoduracinus — likely to require a low level of donation
- Cortinarius castaneofulvus — likely to require a low level of donation
- Cortinarius castaneoides — likely to require a low level of donation
- Cortinarius castaneolens — likely to require a low level of donation
- Cortinarius castaneopallens — likely to require a low level of donation
- Cortinarius castaneopallidus — likely to require a low level of donation
- Cortinarius castaneoruber — likely to require a low level of donation
- Cortinarius castaneus — likely to require a low level of donation
- Cortinarius castoreus — likely to require a low level of donation
- Cortinarius catalaunicus — likely to require a low level of donation
- Cortinarius catarracticus — likely to require a low level of donation
- Cortinarius catervatus — likely to require a low level of donation
- Cortinarius catharinae — likely to require a low level of donation
- Cortinarius catskillensis — likely to require a low level of donation
- Cortinarius cauquenensis — likely to require a low level of donation
- Cortinarius causticus — likely to require a low level of donation
- Cortinarius cavipes — likely to require a low level of donation
- Cortinarius cedretorum — likely to require a low level of donation
- Cortinarius cedretorum f. mesosporus — likely to require a low level of donation
- Cortinarius cedriodor — likely to require a low level of donation
- Cortinarius cedriolens — likely to require a low level of donation
- Cortinarius cedriosmus — likely to require a low level of donation
- Cortinarius centrifugus — likely to require a low level of donation
- Cortinarius centrirufus — likely to require a low level of donation
- Cortinarius centroguttatus — likely to require a low level of donation
- Cortinarius cephalixoides — likely to require a low level of donation
- Cortinarius cephalixolargus — likely to require a low level of donation
- Cortinarius cephalixus — likely to require a low level of donation
- Cortinarius cepistipes — likely to require a low level of donation
- Cortinarius ceraceus — likely to require a low level of donation
- Cortinarius cereifolius — likely to require a low level of donation
- Cortinarius cervinicolor — likely to require a low level of donation
- Cortinarius cervinoporphyreus — likely to require a low level of donation
- Cortinarius cervinus — likely to require a low level of donation
- Cortinarius ceskae — likely to require a low level of donation
- Cortinarius chailluzii — likely to require a low level of donation
- Cortinarius chalybeus — likely to require a low level of donation
- Cortinarius chamaeleon — likely to require a low level of donation
- Cortinarius chamaesalicis — likely to require a low level of donation
- Cortinarius chevassutii — likely to require a low level of donation
- Cortinarius chlorophanus — likely to require a low level of donation
- Cortinarius choloides — likely to require a low level of donation
- Cortinarius chromataphilus — likely to require a low level of donation
- Cortinarius chromobasis — likely to require a low level of donation
- Cortinarius chrysenteron — likely to require a low level of donation
- Cortinarius chrysma — likely to require a low level of donation
- Cortinarius chrysochalybdeus — likely to require a low level of donation
- Cortinarius chrysoconius — likely to require a low level of donation
- Cortinarius chrysolithus — likely to require a low level of donation
- Cortinarius chrysolithus var. chrysolithus — likely to require a low level of donation
- Cortinarius chrysolitus — likely to require a low level of donation
- Cortinarius chrysomallus — likely to require a low level of donation
- Cortinarius chrysophaeus — likely to require a low level of donation
- Cortinarius chrysophthalmus — likely to require a low level of donation
- Cortinarius chrysopocos — likely to require a low level of donation
- Cortinarius chusqueae — likely to require a low level of donation
- Cortinarius cicindela — likely to require a low level of donation
- Cortinarius cinctipes — likely to require a low level of donation
- Cortinarius cineraceus — likely to require a low level of donation
- Cortinarius cinereobrunneolus — likely to require a low level of donation
- Cortinarius cinereobrunneus — likely to require a low level of donation
- Cortinarius cinereoroseolus — likely to require a low level of donation
- Cortinarius cinereoviolaceus — likely to require a low level of donation
- Cortinarius cinereoviolascens — likely to require a low level of donation
- Cortinarius cinereus — likely to require a low level of donation
- Cortinarius cingulatus — likely to require a low level of donation
- Cortinarius cinnabarinus — likely to require a low level of donation
- Cortinarius cinnamofulvus — likely to require a low level of donation
- Cortinarius cinnamomeofulvus — likely to require a low level of donation
- Cortinarius cinnamomeoides — likely to require a low level of donation
- Cortinarius cinnamomeolutescens — likely to require a low level of donation
- Cortinarius cinnamomeoluteus — likely to require a low level of donation
- Cortinarius cinnamomeus — likely to require a low level of donation
- Cortinarius cinnamophyllus — likely to require a low level of donation
- Cortinarius cinnamostriatulus — likely to require a low level of donation
- Cortinarius cinnamoviolaceus — likely to require a low level of donation
- Cortinarius circinans — likely to require a low level of donation
- Cortinarius circumvelatus — likely to require a low level of donation
- Cortinarius cisqhale — likely to require a low level of donation
- Cortinarius cisticola — likely to require a low level of donation
- Cortinarius cistoglaucopus — likely to require a low level of donation
- Cortinarius cistohelvelloides — likely to require a low level of donation
- Cortinarius cistophilus — likely to require a low level of donation
- Cortinarius cistopulchripes — likely to require a low level of donation
- Cortinarius cistovelatus — likely to require a low level of donation
- Cortinarius citocyaneus — likely to require a low level of donation
- Cortinarius citreisporus — likely to require a low level of donation
- Cortinarius citrinellus — likely to require a low level of donation
- Cortinarius citriniceps — likely to require a low level of donation
- Cortinarius citrinifolius — likely to require a low level of donation
- Cortinarius citrinipedes — likely to require a low level of donation
- Cortinarius citrino-olivaceus — likely to require a low level of donation
- Cortinarius citrinoflavus — likely to require a low level of donation
- Cortinarius citrinofulvescens — likely to require a low level of donation
- Cortinarius citrinolilacinus — likely to require a low level of donation
- Cortinarius citrinophyllus — likely to require a low level of donation
- Cortinarius citrinopigmentosus — likely to require a low level of donation
- Cortinarius citrinovirens — likely to require a low level of donation
- Cortinarius citrinus — likely to require a low level of donation
- Cortinarius citriolens — likely to require a low level of donation
- Cortinarius clandestinus — likely to require a low level of donation
- Cortinarius claricolor — likely to require a low level of donation
- Cortinarius clarobaltoides — likely to require a low level of donation
- Cortinarius clarobrunneus — likely to require a low level of donation
- Cortinarius claroflavus — likely to require a low level of donation
- Cortinarius claroplaniusculus — likely to require a low level of donation
- Cortinarius claroturmalis — likely to require a low level of donation
- Cortinarius clarus — likely to require a low level of donation
- Cortinarius claviceps — likely to require a low level of donation
- Cortinarius clavipes — likely to require a low level of donation
- Cortinarius clelandii — likely to require a low level of donation
- Cortinarius cliduchus — likely to require a low level of donation
- Cortinarius clintonianus — likely to require a low level of donation
- Cortinarius coalescens — likely to require a low level of donation
- Cortinarius coartatus — likely to require a low level of donation
- Cortinarius cobaltinus — likely to require a low level of donation
- Cortinarius coccineus — likely to require a low level of donation
- Cortinarius codinae — likely to require a low level of donation
- Cortinarius codonius — likely to require a low level of donation
- Cortinarius codonoides — likely to require a low level of donation
- Cortinarius coelopus — likely to require a low level of donation
- Cortinarius coeruleo-ochrascens — likely to require a low level of donation
- Cortinarius coeruleolutescens — likely to require a low level of donation
- Cortinarius coeruleopallescens — likely to require a low level of donation
- Cortinarius coerulescens — likely to require a low level of donation
- Cortinarius coerulescentium — likely to require a low level of donation
- Cortinarius coigue — likely to require a low level of donation
- Cortinarius coleoptera — likely to require a low level of donation
- Cortinarius coleopus — likely to require a low level of donation
- Cortinarius collangustus — likely to require a low level of donation
- Cortinarius collariatus — likely to require a low level of donation
- Cortinarius collinitoides — likely to require a low level of donation
- Cortinarius collinitoparvus — likely to require a low level of donation
- Cortinarius collinitus — likely to require only a small donation
- Cortinarius collisteus — likely to require a low level of donation
- Cortinarius collocandoides — likely to require a low level of donation
- Cortinarius collocandus — likely to require a low level of donation
- Cortinarius collybianus — likely to require a low level of donation
- Cortinarius collybioides — likely to require a low level of donation
- Cortinarius colombianus — likely to require a low level of donation
- Cortinarius coloratus — likely to require a low level of donation
- Cortinarius colossipes — likely to require a low level of donation
- Cortinarius colubripes — likely to require a low level of donation
- Cortinarius columbinus — likely to require a low level of donation
- Cortinarius colus — likely to require a low level of donation
- Cortinarius colymbadinus — likely to require a low level of donation
- Cortinarius comarostaphylidis — likely to require a low level of donation
- Cortinarius comarostaphylii — likely to require a low level of donation
- Cortinarius comatus — likely to require a low level of donation
- Cortinarius compactus — likely to require a low level of donation
- Cortinarius compar — likely to require a low level of donation
- Cortinarius comparioides — likely to require a low level of donation
- Cortinarius comparoides — likely to require a low level of donation
- Cortinarius compernis — likely to require a low level of donation
- Cortinarius compressus — likely to require a low level of donation
- Cortinarius comptulus — likely to require a low level of donation
- Cortinarius concolor — likely to require a low level of donation
- Cortinarius concrescens — likely to require a low level of donation
- Cortinarius coneae — likely to require a low level of donation
- Cortinarius confirmatus — likely to require a low level of donation
- Cortinarius confusus — likely to require a low level of donation
- Cortinarius congeminus — likely to require a low level of donation
- Cortinarius conglobatus — likely to require a low level of donation
- Cortinarius congruens — likely to require a low level of donation
- Cortinarius conico-obtusarum — likely to require a low level of donation
- Cortinarius conicocampanulatus — likely to require a low level of donation
- Cortinarius conicoides — likely to require a low level of donation
- Cortinarius conicosordescens — likely to require a low level of donation
- Cortinarius conicoumbonatus — likely to require a low level of donation
- Cortinarius conicus — likely to require a low level of donation
- Cortinarius coniferarum — likely to require a low level of donation
- Cortinarius conioides — likely to require a low level of donation
- Cortinarius conocyboides — likely to require a low level of donation
- Cortinarius conopileus — likely to require only a small donation
- Cortinarius conopilus — likely to require a low level of donation
- Cortinarius consobrinus — likely to require a low level of donation
- Cortinarius constantissimus — likely to require a low level of donation
- Cortinarius conterminus — likely to require a low level of donation
- Cortinarius contractus — likely to require a low level of donation
- Cortinarius contrarius — likely to require a low level of donation
- Cortinarius controversus — likely to require a low level of donation
- Cortinarius contui — likely to require a low level of donation
- Cortinarius contulmensis — likely to require a low level of donation
- Cortinarius conveniens — likely to require a low level of donation
- Cortinarius cookeanus — likely to require a low level of donation
- Cortinarius cookeanus f. cookeanus — likely to require a low level of donation
- Cortinarius cookeanus f. cookianus — likely to require a low level of donation
- Cortinarius cookei — likely to require a low level of donation
- Cortinarius copakensis — likely to require a low level of donation
- Cortinarius coracis — likely to require a low level of donation
- Cortinarius cordipes — likely to require a low level of donation
- Cortinarius corium-caepicii — likely to require a low level of donation
- Cortinarius coronatus — likely to require a low level of donation
- Cortinarius corrosus — likely to require a low level of donation
- Cortinarius corrugatus — likely to require a low level of donation
- Cortinarius corrugis — likely to require a low level of donation
- Cortinarius corruscans — likely to require a low level of donation
- Cortinarius corsico-amethystinus — likely to require a low level of donation
- Cortinarius cortinaria — likely to require a low level of donation
- Cortinarius cortinatus — likely to require a low level of donation
- Cortinarius coruscans — likely to require a low level of donation
- Cortinarius corvinus — likely to require a low level of donation
- Cortinarius corynecystis — likely to require a low level of donation
- Cortinarius cosmoxanthus — likely to require a low level of donation
- Cortinarius costaricensis — likely to require a low level of donation
- Cortinarius cotoneipes — likely to require a low level of donation
- Cortinarius cotoneus — likely to require a low level of donation
- Cortinarius crassifolius — likely to require a low level of donation
- Cortinarius crassisporus — likely to require a low level of donation
- Cortinarius crassogriseascens — likely to require a low level of donation
- Cortinarius crassoides — likely to require a low level of donation
- Cortinarius crassorum — likely to require a low level of donation
- Cortinarius crassus — likely to require a low level of donation
- Cortinarius craticius — likely to require a low level of donation
- Cortinarius cremeiamarescens — likely to require a low level of donation
- Cortinarius cremeoglobosus — likely to require a low level of donation
- Cortinarius cremeolina — likely to require a low level of donation
- Cortinarius cremeorufus — likely to require a low level of donation
- Cortinarius crenulatus — likely to require a low level of donation
- Cortinarius cretaceus — likely to require a low level of donation
- Cortinarius cretax — likely to require a low level of donation
- Cortinarius crispus — likely to require a low level of donation
- Cortinarius cristatosporus — likely to require a low level of donation
- Cortinarius croceicolor — likely to require a low level of donation
- Cortinarius croceobasalis — likely to require a low level of donation
- Cortinarius croceocingulatus — likely to require a low level of donation
- Cortinarius croceocoeruleus — likely to require a low level of donation
- Cortinarius croceocoeruleus var. meridionalis — likely to require a low level of donation
- Cortinarius croceocristallinus — likely to require a low level of donation
- Cortinarius croceofulvus — likely to require a low level of donation
- Cortinarius croceofurfuraceus — likely to require a low level of donation
- Cortinarius croceolamellatus — likely to require a low level of donation
- Cortinarius croceolimbatus — likely to require a low level of donation
- Cortinarius croceolutescens — likely to require a low level of donation
- Cortinarius croceosimilis — likely to require a low level of donation
- Cortinarius croceotinctus — likely to require a low level of donation
- Cortinarius croceotinctus var. croceotinctus — likely to require a low level of donation
- Cortinarius croceotinctus var. minisporus — likely to require a low level of donation
- Cortinarius croceus — likely to require a low level of donation
- Cortinarius cruentipellis — likely to require a low level of donation
- Cortinarius cruentiphyllus — likely to require a low level of donation
- Cortinarius cruentoides — likely to require a low level of donation
- Cortinarius cruentus — likely to require a low level of donation
- Cortinarius crustulatus — likely to require a low level of donation
- Cortinarius crustulinicolor — likely to require a low level of donation
- Cortinarius crustulinus — likely to require a low level of donation
- Cortinarius crustutinus — likely to require a low level of donation
- Cortinarius cryptus — likely to require a low level of donation
- Cortinarius crystallinus — likely to require a low level of donation
- Cortinarius crystallophorus — likely to require a low level of donation
- Cortinarius cucullatus — likely to require a low level of donation
- Cortinarius cucullifer — likely to require a low level of donation
- Cortinarius cucumeris — likely to require a low level of donation
- Cortinarius cucumis — likely to require a low level of donation
- Cortinarius cucumisporus — likely to require a low level of donation
- Cortinarius cumatilis — likely to require a low level of donation
- Cortinarius cunninghamii — likely to require a low level of donation
- Cortinarius cuprarius — likely to require a low level of donation
- Cortinarius cupreonatus — likely to require a low level of donation
- Cortinarius cupreorufus — likely to require a low level of donation
- Cortinarius cupreoviolaceus — likely to require a low level of donation
- Cortinarius cuprescens — likely to require a low level of donation
- Cortinarius curanilahuensis — likely to require a low level of donation
- Cortinarius cuspidatus — likely to require a low level of donation
- Cortinarius cuteclarus — likely to require a low level of donation
- Cortinarius cuteruptus — likely to require a low level of donation
- Cortinarius cyanescens — likely to require a low level of donation
- Cortinarius cyaneus — likely to require a low level of donation
- Cortinarius cyanites — likely to require a low level of donation
- Cortinarius cyanobasalis — likely to require a low level of donation
- Cortinarius cyanopus — likely to require a low level of donation
- Cortinarius cyanosterix — likely to require a low level of donation
- Cortinarius cyanus — likely to require a low level of donation
- Cortinarius cyanus var. cyanus — likely to require a low level of donation
- Cortinarius cycneus — likely to require a low level of donation
- Cortinarius cylindratus — likely to require a low level of donation
- Cortinarius cylindripes — likely to require a low level of donation
- Cortinarius cylindripes s.l. JMP0059 — likely to require a low level of donation
- Cortinarius cylindrisporus — likely to require a low level of donation
- Cortinarius cylindrospermus — likely to require a low level of donation
- Cortinarius cypriacoides — likely to require a low level of donation
- Cortinarius cypriacus — likely to require a low level of donation
- Cortinarius cyprinus — likely to require a low level of donation
- Cortinarius cypripedi — likely to require a low level of donation
- Cortinarius cystidifer — likely to require a low level of donation
- Cortinarius cystidiobicolor — likely to require a low level of donation
- Cortinarius cystidiocatenatus — likely to require a low level of donation
- Cortinarius cystidiophorus — likely to require a low level of donation
- Cortinarius cystidiorapaceus — likely to require a low level of donation
- Cortinarius dactylichrous — likely to require a low level of donation
- Cortinarius dactylodermus — likely to require a low level of donation
- Cortinarius dalecarlicus — likely to require a low level of donation
- Cortinarius damascenoides — likely to require a low level of donation
- Cortinarius damascenus — likely to require a low level of donation
- Cortinarius danicus — likely to require a low level of donation
- Cortinarius danili — likely to require a low level of donation
- Cortinarius darwinii — likely to require a low level of donation
- Cortinarius daucodes — likely to require a low level of donation
- Cortinarius daulnoyae — likely to require a low level of donation
- Cortinarius davemallochii — likely to require a low level of donation
- Cortinarius davisii — likely to require a low level of donation
- Cortinarius debbieae — likely to require a low level of donation
- Cortinarius deceptivissimus — likely to require a low level of donation
- Cortinarius deceptivus — likely to require a low level of donation
- Cortinarius decipiens — likely to require only a small donation
- Cortinarius decipientoides — likely to require a low level of donation
- Cortinarius decolorus — likely to require a low level of donation
- Cortinarius decoratus — likely to require a low level of donation
- Cortinarius decumbens — likely to require a low level of donation
- Cortinarius decurtatus — likely to require a low level of donation
- Cortinarius definiendus — likely to require a low level of donation
- Cortinarius deflexus — likely to require a low level of donation
- Cortinarius deianae — likely to require a low level of donation
- Cortinarius delaportei — likely to require a low level of donation
- Cortinarius delibutus — likely to require a low level of donation
- Cortinarius delicatus — likely to require a low level of donation
- Cortinarius deminutus — likely to require a low level of donation
- Cortinarius denigratus — likely to require a low level of donation
- Cortinarius denseconnatus — likely to require a low level of donation
- Cortinarius depallens — likely to require a low level of donation
- Cortinarius depauperatus — likely to require a low level of donation
- Cortinarius depexus — likely to require a low level of donation
- Cortinarius depressus — likely to require a low level of donation
- Cortinarius derelictus — likely to require a low level of donation
- Cortinarius dermagnitus — likely to require a low level of donation
- Cortinarius deroleptus — likely to require a low level of donation
- Cortinarius detonsus — likely to require a low level of donation
- Cortinarius detudis — likely to require a low level of donation
- Cortinarius diabolicoides — likely to require a low level of donation
- Cortinarius diabolicorigens — likely to require a low level of donation