N - Nz
| Najas chinensis | Nixkraut Chinesisches | Chinese Waternymph | Hydrocharitaceae |
| Najas flexilis | Nixkraut Biegsames | Nodding Waternymph | Hydrocharitaceae |
| Najas gracillima | Nixkraut Zierliches | Slender Waternymph | Hydrocharitaceae |
| Najas graminea | Nixkraut Gras | Ricefield Waternymph | Hydrocharitaceae |
| Najas marina | Nixkraut Großes | Spiny Waternymph | Hydrocharitaceae |
| Najas minor | Nixkraut Kleines | Brittle Waternymph | Hydrocharitaceae |
| Narcissus assoanus | Narzisse Binsen | Rush- leaf Daffodil | Amaryllidaceae |
| Narcissus bicolor | Narzisse Zweifarbige | Two- coloured Daffodil | Amaryllidaceae |
| Narcissus bulbocodium | Narzisse Reifrock | Petticoat Daffodil | Amaryllidaceae |
| Narcissus calcicola | Narzisse Kalk | Lime Daffodil | Amaryllidaceae |
| Narcissus cantabricus | Narzisse Kantabrische | Cantabrian Daffodil | Amaryllidaceae |
| Narcissus cavanillesii | Narzisse Niedrige | Cavanille's Daffodil | Amaryllidaceae |
| Narcissus cuatrecasasii | Narzisse Cuatrecasasas' | Cuatrecasasas's Daffodil | Amaryllidaceae |
| Narcissus cyclamineus | Narzisse Alpenveilchen | Cyclamen- like Daffodil | Amaryllidaceae |
| Narcissus dubius | Narzisse Zweifelhafte | Doubtful Daffodil | Amaryllidaceae |
| Narcissus elegans | Narzisse Zierliche | Elegant Daffodil | Amaryllidaceae |
| Narcissus gaditanus | Narzisse Cadiz | Gaditanian Daffodil | Amaryllidaceae |
| Narcissus gadorensis | Narzisse Sierra Gador | Sierra Gador Daffodil | Amaryllidaceae |
| Narcissus hedraeanthus | Narzisse Sitzendblütige | Sedentary- flowered Daffodil | Amaryllidaceae |
| Narcissus jonquilla | Narzisse Jonquillen | Wild Jonquil | Amaryllidaceae |
| Narcissus minor | Narzisse Kleine | Small Daffodil | Amaryllidaceae |
| Narcissus moschatus | Narzisse Moschus | Musk Daffodil | Amaryllidaceae |
| Narcissus munozii- garmendiae | Narzisse Muñoz Garmendias | Muñoz Garmendia's Daffodil | Amaryllidaceae |
| Narcissus nevadensis | Narzisse Sierra Nevada | Sierra Nevada Daffodil | Amaryllidaceae |
| Narcissus obsoletus | Narzisse Veraltete | Obsolete Daffodil | Amaryllidaceae |
| Narcissus pachybolbus | Narzisse Dickzwiebelige | Twisted- leaved Daffodil | Amaryllidaceae |
| Narcissus papyraceus | Narzisse Weihnachts | Paperwhite Daffodil | Amaryllidaceae |
| Narcissus poeticus | Narzisse Dichter | Poet's Daffodil | Amaryllidaceae |
| Narcissus pseudonarcissus | Narzisse Gelbe | Trumpet Daffodil | Amaryllidaceae |
| Narcissus radiiflorus | Narzisse Stern | Star- flowered Daffodil | Amaryllidaceae |
| Narcissus rupicola | Narzisse Felsen | Rock Daffodil | Amaryllidaceae |
| Narcissus scaberulus | Narzisse Raublättrige | Rough- leaf Daffodil | Amaryllidaceae |
| Narcissus serotinus | Narzisse Spätblühende | Late- flowering Daffodil | Amaryllidaceae |
| Narcissus tazetta | Narzisse Tazetten | Tazette | Amaryllidaceae |
| Narcissus tazetta ssp. aureus | Narzisse Gold- Tazetten | Golden Tazette | Amaryllidaceae |
| Narcissus triandrus | Narzisse Engelstränen | Three- stamen Daffodil | Amaryllidaceae |
| Narcissus triandrus ssp. lusitanicus | Narzisse Portugiesische | Portuguese Daffodil | Amaryllidaceae |
| Narcissus viridiflorus | Narzisse Grüne | Green Daffodil | Amaryllidaceae |
| Narcissus x cyclazetta | Narzisse Zwerg | Dwarf Daffodil | Amaryllidaceae |
| Narcissus x incomparabilis | Narzisse Unvergleichliche | Nonesuch Daffodil | Amaryllidaceae |
| Narcissus x odorus | Narzisse Duft | Campernelle Jonquil | Amaryllidaceae |
| Narcissus x perezlerae | Narzisse Winter | Perez's Daffodil | Amaryllidaceae |
| Narcissus x verbanensis | Narzisse Langensee | Star- flowered Daffodil | Amaryllidaceae |
| Narthecium ossifragum | Ährenlilie Moor | Bog Asphodel | Nartheciaceae |
| Narthecium reverchonii | Ährenlilie Reverchons | Corsican Asphodel | Nartheciaceae |
| Narthecium scardicum | Ährenlilie Balkan | Balkan Asphodel | Nartheciaceae |
| Naufraga balearica | Naufraga Balearische | Balearic Naufraga | Apiaceae |
| Nectaroscordum siculum | Honiglauch Sizilianischer | Sicilian Honey Lily | Alliaceae |
| Neatostema apulum | Steinsame Apulischer | Yellow Gromwell | Boraginaceae |
| Neotinea conica | Knabenkraut Kegel | Conical Orchid | Orchidaceae |
| Neotinea intacta | Keuschorchis | Dense- flowered Orchid | Orchidaceae |
| Neotinea lactea | Knabenkraut Milchweißes | Milky Orchid | Orchidaceae |
| Neotinea tridentata | Knabenkraut Dreizähniges | Toothed Orchid | Orchidaceae |
| Neotinea ustulata | Knabenkraut Brand | Burnt Orchid | Orchidaceae |
| Neottia nidus- avis | Nestwurz Vogel | Bird's Nest Orchid | Orchidaceae |
| Neottia cordata | Zweiblatt Kleines | Lesser Twayblade | Orchidaceae |
| Neottia ovata | Zweiblatt Großes | Common Twayblade | Orchidaceae |
| Nepeta agrestis | Katzenminze Acker | Corsican Cat- Mint | Lamiaceae |
| Nepeta amethystina | Katzenminze Amethyst | Amethyst Cat- Mint | Lamiaceae |
| Nepeta apuleji | Katzenminze Apuleius' | African Cat- Mint | Lamiaceae |
| Nepeta argolica | Katzenminze Argolis | Argolis Cat- Mint | Lamiaceae |
| Nepeta caerulea | Katzenminze Blaue | Blue Cat- Mint | Lamiaceae |
| Nepeta camphorata | Katzenminze Kampfer | Camphor Cat- Mint | Lamiaceae |
| Nepeta camphorata var. heldreichii | Katzenminze Heldreichs | Heldreich's Cat- Mint | Lamiaceae |
| Nepeta cataria | Katzenminze Gewöhnliche | Common Cat- Mint | Lamiaceae |
| Nepeta dirphya | Katzenminze Dirphys | Evvia Cat- Mint | Lamiaceae |
| Nepeta foliosa | Katzenminze Beblätterte | Leafy Cat- Mint | Lamiaceae |
| Nepeta granatensis | Katzenminze Granada | Granada Cat- Mint | Lamiaceae |
| Nepeta grandiflora | Katzenminze Großblütige | Giant Cat- Mint | Lamiaceae |
| Nepeta hispanica | Katzenminze Spanische | Spanish Cat- Mint | Lamiaceae |
| Nepeta hystrix | Katzenminze Stachelschwein | Porcupine Cat- Mint | Lamiaceae |
| Nepeta italica | Katzenminze Italienische | Italian Cat- Mint | Lamiaceae |
| Nepeta latifolia | Katzenminze Breitblättrige | Broad- leaf Cat- Mint | Lamiaceae |
| Nepeta melissifolia | Katzenminze Melissenblättrige | Balm- leaved Cat- Mint | Lamiaceae |
| Nepeta multibracteata | Katzenminze Portugiesische | Portuguese Cat- Mint | Lamiaceae |
| Nepeta nepetella | Katzenminze Kleine | Lesser Cat- Mint | Lamiaceae |
| Nepeta nuda | Katzenminze Kahle | Hairless Cat- Mint | Lamiaceae |
| Nepeta orphanidea | Katzenminze Orphanides' | Orphanides's Cat- Mint | Lamiaceae |
| Nepeta parnassica | Katzenminze Parnass | Parnassos Cat- Mint | Lamiaceae |
| Nepeta racemosa | Katzenminze Traubige | Raceme Cat- Mint | Lamiaceae |
| Nepeta scordotis | Katzenminze Filzige | Tomentose Cat- Mint | Lamiaceae |
| Nepeta sphaciotica | Katzenminze Sfakia | Sfakia Cat- Mint | Lamiaceae |
| Nepeta spuneri | Katzenminze Spruners | Spruner's Cat- Mint | Lamiaceae |
| Nepeta tuberosa | Katzenminze Knollige | Bulbous Cat- Mint | Lamiaceae |
| Nepeta x faassenii | Katzenminze Hybrid | Garden Cat- Mint | Lamiaceae |
| Nerium oleander | Oleander | Oleander | Apocynaceae |
| Nicandra pysalodes | Giftbeere | Apple of Peru | Solanaceae |
| Nicotiana alata | Tabak Flügel | Jasmine Tobacco | Solanaceae |
| Nicotiana glauca | Tabak Blaugrüner | Tree Tobacco | Solanaceae |
| Nicotiana rustica | Tabak Bauern | Aztec Tobacco | Solanaceae |
| Nicotiana sylvestris | Tabak Wald | Wood Tobacco | Solanaceae |
| Nicotiana tabacum | Tabak Virginischer | Common Tobacco | Solanaceae |
| Nicotiana x sanderae | Tabak Sanders | Flowering Tobacco | Solanaceae |
| Nigella arvensis | Schwarzkümmel Acker | Field Nigella | Ranunculaceae |
| Nigella carpatha | Schwarzkümmel Karpathos | Karpathos- Nigella | Ranunculaceae |
| Nigella ciliaris | Schwarzkümmel Bewimperter | Pinwheel Nigella | Ranunculaceae |
| Nigella damascena | Schwarzkümmel Damaszener | Love in the Mist | Ranunculaceae |
| Nigella degenii ssp. barbro | Schwarzkümmel Barbros | Degen's Nigella | Ranunculaceae |
| Nigella degenii | Schwarzkümmel Degens | Degen's Nigella | Ranunculaceae |
| Nigella doerfleri | Schwarzkümmel Dörflers | Doerfler's Nigella | Ranunculaceae |
| Nigella elata | Schwarzkümmel Hoher | Tall Nigella | Ranunculaceae |
| Nigella fumariifolia | Schwarzkümmel Erdrauchblättriger | Fumitory- leaved Nigella | Ranunculaceae |
| Nigella gallica | Schwarzkümmel Französischer | Spanish Love in a Mist | Ranunculaceae |
| Nigella icarica | Schwarzkümmel Ikaria | Ikaria Nigella | Ranunculaceae |
| Nigella orientalis | Schwarzkümmel Orientalischer | Yellow Nigella | Ranunculaceae |
| Nigella papillosa | Schwarzkümmel Warziger | Papillose Nigella | Ranunculaceae |
| Nigella sativa | Schwarzkümmel Echter | Black Cumin | Ranunculaceae |
| Nigella stricta | Schwarzkümmel Steifer | Stiff Nigella | Ranunculaceae |
| Nigritella archiducis- joannis | Kohlröschen Erzherzog Johann | Archduke- John Vanilla Orchid | Orchidaceae |
| Nigritella austriaca | Kohlröschen Österreichisches | Austrian Vanilla Orchid | Orchidaceae |
| Nigritella dolomitensis | Kohlröschen Dolomiten | Dolomite Vanilla Orchid | Orchidaceae |
| Nigritella gabasiana | Kohlröschen Gabas | Gabas Vanilla Orchid | Orchidaceae |
| Nigritella miniata | Kohlröschen Rotes | Red Vanilla Orchid | Orchidaceae |
| Nigritella rhellicani | Kohlröschen Schwarzes | Black Vanilla Orchid | Orchidaceae |
| Nigritella stiriaca | Kohlröschen Steirisches | Styrian Vanilla Orchid | Orchidaceae |
| Nigritella widderi | Kohlröschen Widders | Widder's Vanilla Orchid | Orchidaceae |
| Nonea atra | Mönchskraut Dunkles | Dark Monk's Wort | Boraginaceae |
| Noaea mucronata | Salzkraut Dorniges | Thorny Saltwort | Boraginaceae |
| Nonea calycina | Mönchskraut Kelchiges | Many- coloured Monk's Wort | Boraginaceae |
| Nonea echioides | Mönchskraut Natternkopf | Bugloss Monk's Wort | Boraginaceae |
| Nonea erecta | Mönchskraut Braunes | Brown Monk's Wort | Boraginaceae |
| Nonea lutea | Mönchskraut Gelbes | Yellow Monk's Wort | Boraginaceae |
| Nonea micrantha | Mönchskraut Blaues | Blue Monk's Wort | Boraginaceae |
| Nonea pallens | Mönchskraut Bleiches | Pale Monk's Wort | Boraginaceae |
| Nonea rosea | Mönchskraut Rosenrotes | Rose Monk's Wort | Boraginaceae |
| Nonea vesicaria | Mönchskraut Rotes | Red Monk's Wort | Boraginaceae |
| Nonea versicolor | Mönchskraut Verschiedenfarbiges | Varied Monk's Wort | Boraginaceae |
| Nothobartsia asperrima | Alpenhelm Rauer | Rough Bartsia | Orobanchaceae |
| Nothobartsia spicata | Alpenhelm Pyrenäen | Pyrenean Bartsia | Orobanchaceae |
| Notholaena marantae | Pelzfarn Marantas | Hardy Cloak Fern | Pteridaceae |
| Notobasis syriaca | Kratzdistel Syrische | Syrian Plumed Thistle | Asteraceae |
| Nuphar lutea | Teichrose Große | Yellow Waterlily | Nymphaeaceae |
| Nuphar pumila | Teichrose Kleine | Least Waterlily | Nymphaeaceae |
| Nymphaea alba | Seerose Weiße | White Waterlily | Nymphaeaceae |
| Nymphaea candida | Seerose Kleine | Atlantic Waterlily | Nymphaeaceae |
| Nymphoides peltata | Seekanne Europäische | Yellow Floatingheart | Menyanthaceae |