| Scientific name | Norwegian name | English name | Redlisted | ||
|---|---|---|---|---|---|
| Cakile maritima ssp. islandica | Ishavsreddik | Artic Sea Rocket | |||
| Calamagrostis neglecta ssp. groenlandica | Smårørkvein | Narrow Small-reed |  |
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| Calamagrostis purpurascens | Stepperørkvein | Purple reedgrass, Alpine reedgrass | VU = Vulnerable | ||
| Campanula rotundifolia ssp. gieseckiana | Arktisk blåklokke | Hairbell, Bluebell | VU = Vulnerable |  |
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| Campanula uniflora | Høgfjellsklokke | Alpine Hairbell, Alpine Bluebell | VU = Vulnerable |  |
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| Cardamine bellidifolia ssp. bellidifolia | Høgfjellskarse | Alpine Cress, Alpine Bitter-cress |  |
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| Cardamine pratensis ssp. angustifolia | Polarkarse | Polar Cress (Cuckooflower) |  |
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| Cardamine silvestris | Skogskarse | Forest Cress |  |
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| Carex bigelowii ssp. arctisibirica | Stivstarr | Bigelow´s Sedge | CR = Critically Endangered |  |
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| Carex capillaris ssp. fuscidula | Hårstarr | Hair sedge | VU = Vulnerable |  |
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| Carex concolor | Tundrastarr | CR = Critically Endangered | |||
| Carex fuliginosa ssp. misandra | Dubbestarr | Shortleaved sedge |  |
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| Carex glacialis | Rabbestarr | Glacial Sedge | VU = Vulnerable |  |
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| Carex glareosa | Grusstarr | Gravel Sedge |  |
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| Carex krausei | VU = Vulnerable |  |
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| Carex lachenalii | Rypestarr | Twotipped Sedge, Hare´s foot Sedge |  |
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| Carex lidii | Lidsstarr | VU = Vulnerable |  |
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| Carex marina ssp. pseudolagopina | VU = Vulnerable |  |
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| Carex maritima | Buestarr |  |
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| Carex nardina ssp. hepburnii | Arktisk skjeggstarr |  |
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| Carex parallela | Smalstarr | Parallel Sedge |  |
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| Carex rupestris | Bergstarr |  |
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| Carex saxatilis ssp. laxa | Skaftblankstarr |  |
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| Carex subspathacea | Ishavsstarr | ||||
| Carex ursina | Isbjørnstarr |  |
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| Cassiope tetragona | Kantlyng | Arctic bell-heather |  |
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| Cerastium alpinum | Fjellarve | ||||
| Cerastium arcticum | Tundraarve | Arctic mouse-ear |  |
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| Cerastium cerastoides | Brearve | ||||
| Cerastium regelii ssp. caespitosum | Polararve |  |
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| Chrysosplenium tetrandrum | Dvergmaigull | Northern golden saxifrage (US) |  |
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| Cochlearia groenlandica | Polarskjørbuksurt | Greenland scurvy-grass |  |
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| Comastoma tenellum | Småsøte | EN = Endangered |  |
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| Coptidium lapponicum | Lappsoleie |  |
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| Coptidium pallasii | Glinsesoleie | Glossy Buttercup | NT = Near Threatened |  |
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| Coptidium X spitsbergense | Svalbardsoleie |  |
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| Cystopteris fragilis | Skjørlok | Brittle bladder-fern |  |
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