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| Subject | English | Icelandic |
| bot. | lesser bladderwort | blöðrujurt (Utricularia minor L.) |
| bot. | lesser clubmoss | mosajafni (Selaginella selaginoides (L.) Link.; Lycopodium selaginoides L.) |
| bot. | lesser gold-of-pleasure | hundalín (Camelina microcarpa Andrz. ex DC.; Camelina microcarpa Andrz. ex DC. ssp. sylvestris (Wallr.) Hiitonen; Camelina sativa (L.) Crantz ssp. microcarpa (Andrz. ex DC.) Hegi & E. Schmid (ssp. microcarpa); Camelina pilosa (DC.) Vassilcz.; Camelina sativa (L.) Crantz ssp. pilosa (DC.) N. W. Zinger; Camelina sativa (L.) Crantz var. pilosa DC. (ssp. pilosa)) |
| bot. | lesser pondweed | smánykra (Potamogeton pusillus L.; Potamogeton panormitanus Biv.) |
| bot. | lesser sea-spurrey | flæðaskurfa (Spergularia marina (L.) Griseb.; Spergula salina (J. Presl & C. Presl) D. Dietr.; Spergularia salina J. Presl & C. Presl) |
| ornit. | lesser spotted woodpecker | stubbspæta (Dendrocopus minor) |
| bot. | lesser stitchwort | grasarfi (Stellaria graminea L.) |
| bot. | lesser twayblade | hjartatvíblaðka (Listera cordata (L.) R. Br.) |