G - K - Scientific names starting on G, I, J and K
| Harrimanella hypnoides | Moselyng | Mossy Mountain-heather | R |  |
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| Hierochloe alpina ssp. alpina | Fjellmarigras | Artic Holy Grass |  |
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| Hippuris vulgaris | Hesterumpe | Mare's tail | No picture yet | No picture yet | |
| Honkenya peploides ssp. diffusa | Strandarve | Sea Sandworth |  |
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| Huperzia arctica | Polarlusegress | Polar Fir Clubmoss |  |
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| Juncus albescens | Trillingsiv | Three-flowered Rush |  |
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| Juncus arcticus ssp. arcticus | Finnmarksiv | Artic Rush | R |  |
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| Juncus biglumis | Tvillingsiv | Two-flowered Rush |  |
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| Juncus castaneus ssp. castaneus | Kastanjesiv | Chestnut Rush | R | No picture yet | No picture yet |
| Kobresia simpliciuscula ssp. subholarctica | Myrtust | False Sedge | R |  |
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| Koenigia islandica | Dvergsyre | Iceland-purslane |  |
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