| N |
| Nandina domestica 'Alba', White berry nandina |
| Nandina domestica 'Fire Power', Fire Power nandina |
| Nandina domestica 'Gulf Stream', Gulf Stream nandina |
| Nandina domestica 'Harbour Dwarf', Harbour Dwarf nandina |
| Nandina domestica 'Plum Purple', Plum Purple nandina |
| Nandina domestica 'San Gabriel', San Gabriel nandina |
| Nandina domestica 'Umpqua Chief', Umpqua Chief nandina |
| Nandina domestica 'Wood's Dwarf', Wood's Dwarf nandina |
| Nandina domestica, Nandina |
|
Narcissus (Hardy I), Daffodils; Jonquils |
|
Narcissus (Hardy II), Daffodils; Jonquils |
|
Narcissus (Paperwhites) - Tender III, Paperwhite narcissus; Tazettas |
| Nassella tenuissima, Mexican feather grass |
| Neillia sinensis, Chinese neillia |
| Neillia uekii -- |
| Nelumbo lutea, American lotus; Nelumbo |
| Nemesia strumosa, Pouch nemseia |
| Nemophila menziesii, Baby-blue-eyes; Nemophila |
|
Nepeta spp., Catmint |
| Nepeta x faasenii, Faasen's catmint; Blue catmint |
| Nepta cataria, Catnip |
|
Nerine bowdenii, Cape flower; Guernsey lily; Japanese spider lily |
| Nerine, Guernsey lily |
| Nerium oleander, Oleander |
| Neviusia alabamensis, Alabama snowwreath; Snow wreath |
| Nicotiana alata, Flowering tobacco; Nicotiana |
| Nicotiana sylvestris, White shooting stars |
| Nierembergia hippomanica, Cupflower; Nierembergia |
| Nigella damascena, Nigella; Love-in-a-mist |
| Nomocharis |
| Nymphaea 'Albert Greenburg', Albert Greenburg water lily |
| Nymphaea 'Antares', Antares water lily |
| Nymphaea 'Arc-en-Ciel', Arc-en-Ciel water lily |
| Nymphaea 'Attraction', Attraction water lily |
| Nymphaea 'Bagdad', Bagdad water lily |
| Nymphaea 'Blue Beauty', Blue Beauty water lily; Pennsylvania water lily |
| Nymphaea 'Bob Trickett', Bob Trickett water lily |
| Nymphaea 'Charlene Strawn', Charlene Strawn water lily |
| Nymphaea 'Charles de Meurville', Charles de Meurville water lily |
| Nymphaea 'Colorado', Colorado water lily |
| Nymphaea 'Colossea', Colossea water lily |
| Nymphaea 'Comanche', Comanche water lily |
| Nymphaea 'Conqueror', Conqueror water lily |
| Nymphaea 'Cynthia Ann', Cynthia Ann water lily |
| Nymphaea 'Darwin', Darwin water lily |
| Nymphaea 'Daubeniana', Dauben water lily; Daubeniana water lily |
| Nymphaea 'Director George T. Moore', Director George T. Moore water lily |
| Nymphaea 'Edward D. Uber', Edward D. Uber water lily |
| Nymphaea 'Ellisiana', Ellisiana water lily |
| Nymphaea 'Emily Grant Hutchings', Emily Grant Hutchings water lily |
| Nymphaea 'Firecrest', Firecrest water lily |
| Nymphaea 'Froebeli', Froebeli water lily |
| Nymphaea 'General Pershing', General Pershing water lily |
| Nymphaea 'Georgia Peach', Georgia Peach water lily |
| Nymphaea 'Gladstone', Gladstone water lily |
| Nymphaea 'Gloriosa', Gloriosa water lily |
| Nymphaea 'Green Smoke', Green Smoke water lily |
| Nymphaea 'Helvola', Helvola water lily; Yellow Pygmy water lily |
| Nymphaea 'Hybrid Hardy Yellow', Hardy Yellow water lily |
| Nymphaea 'Innerlight', Innerlight water lily |
| Nymphaea 'Isabelle Pring', Isabelle Pring water lily |
| Nymphaea 'James Brydon', James Brydon water lily |
| Nymphaea 'Joanne Pring', Joanne Pring water lily |
| Nymphaea 'Joey Tomocick', Joey Tomocick water lily |
| Nymphaea 'Judge Hitchcock', Judge Hitchcock water lily |
| Nymphaea 'Lemon Chiffon', Lemon Chiffon water lily |
| Nymphaea 'Leopardess', Leopardess water lily |
| Nymphaea 'Lily Pons', Lily Pons water lily |
| Nymphaea 'Louise', Louise water lily |
| Nymphaea 'Luciana', Luciana water lily; Pink Beauty water lily |
| Nymphaea 'Lucida', Lucida water lily |
| Nymphaea 'Madame Ganna Walska', Madame Ganna Walska water lily |
| Nymphaea 'Mayla', Mayla water lily |
| Nymphaea 'Midnight', Midnight water lily |
| Nymphaea 'Missouri', Missouri water lily |
| Nymphaea 'Moorei', Moorei water lily |
| Nymphaea 'Mount Shasta', Mount Shasta water lily |
| Nymphaea 'Mrs. Martin E. Randig', Mrs. Martin E. Randig water lily |
| Nymphaea 'Newton', Newton water lily |
| Nymphaea 'Odorata', Odorata water lily |
| Nymphaea 'Pamela', Pamela water lily |
| Nymphaea 'Panama Pacific', Panama Pacific water lily |
| Nymphaea 'Peachglow', Peachglow water lily |
| Nymphaea 'Perry's Baby Red', Perry's Baby Red water lily |
| Nymphaea 'Perry's Fire Opal', Perry's Fire Opal water lily |
| Nymphaea 'Perry's Red Wonder', Perry's Red Wonder water lily |
| Nymphaea 'Peter Slocum', Peter Slocum water lily |
| Nymphaea 'Pink Opal', Pink Opal water lily |
| Nymphaea 'Pink Platter', Pink Platter water lily |
| Nymphaea 'Pink Sensation', Pink Sensation water lily |
| Nymphaea 'Queen of Whites', Queen of Whites water lily |
| Nymphaea 'Radiant Red', Radiant Red water lily |
| Nymphaea 'Ray Davies', Ray Davies water lily |
| Nymphaea 'Rose Arey', Rose Arey water lily |
| Nymphaea 'Rosennymphe', Rosennymphe water lily |
| Nymphaea 'Rosy Morn', Rosy Morn water lily |
| Nymphaea 'Shirley Bryne', Shirley Bryne water lily |
| Nymphaea 'Sioux', Sioux water lily |
| Nymphaea 'Sirius', Sirius water lily |
| Nymphaea 'Splendida', Splendida water lily |
| Nymphaea 'St. Louis Gold', St. Louis Gold water lily |
| Nymphaea 'St. Louis', St. Louis water lily |
| Nymphaea 'Starbright', Starbright water lily |
| Nymphaea 'Sultan', Sultan water lily |
| Nymphaea 'Texas Dawn', Texas Dawn water lily |
| Nymphaea 'Tina', Tina water lily |
| Nymphaea 'Venus', Venus water lily |
| Nymphaea 'Virginalis', Virginalis water lily |
| Nymphaea 'Virginia', Virginia water lily |
| Nymphaea 'William Falconer', William Falconer water lily |
| Nymphaea 'Yellow Dazzler', Yellow Dazzler water lily |
| Nymphaea colorata, Colorata water lily; Blue Pigmy water lily |
| Nymphaea odorata, American water lily; Fragrant water-lily |
| Nymphaea x marliacea 'Carnea', Carnea water lily |
| Nymphaea x marliacea 'Chromatella', Chromatella water lily; Golden Cup water lily; Marlic Yellow water lily |
| Nymphoides pelatum, Floating heart; Yellow floating heart; Yellow water fringe |
| Nyssa aquatica, Water tupelo |
| Nyssa biflora, Swamp tupelo |
| Nyssa ogeche, Ogeechee tupelo |
| Nyssa sinensis, Chinese tupelo |
| Nyssa sylvatica, Black gum; Black tupelo; Sour gum |