N
| English Name | Scientific Name | Spanish Name |
| Nance | Byrsonima crassifolia | Nance, Nanche, Nanache, Nan-Chi |
| Navajo Tea, Hopi, Tea, Indian Tea, Cota | Thelesperma gracile | Cota, Té de cota |
| Needleleaf Plant | Peperomia galioides, P. quadrifolia | Verdolaguilla |
| Nettle | -- Urtica dioica, U. subincisa U. urens |
-- Ortiga, O. mayor Ortiga menor |
| Nettlespurge, Purging Nut, Belly Ache Bush, Limberbush, Wild Cassada | -- Jatropha spp J. curcas J. gossypifolia |
-- Palo Sangriento, Sangre de drago, Sangregado, Telondilla Sangregrado Frailesillo, Mala mujer |
| Night-blooming Cereus, Queen of the Night | Cereus grandiflora or Cactus grandiflorus | Cactus grandiflora, Flor de junco, Ptihaya, Reina de la noche |
| Night (Day)-blooming Jessamine | Cestrum spp | Huele de Noche, Yerba del perro |
| Nightshade, Bittersweet, Malabar, Wild Tobacco (1) -- Little White Nightshade Climbing Nightshade -- Orangeberry Nightshade White-margined Nightshade |
-- Solanum spp S. americanum S. dulcamara S. hinsianum S. lanceolatum S. marginatum |
-- Chichiquelito, Buena mujer, Malabar, Mariola, Solano Negro, Yerba Mora Hierba mora, Quelite cimarrón Dulcamara, Solano Mariola, Ocotillo, Yerba Mora Berenjena, Canicas, Comida de chinaca, Sosa, Tomatillo Sosa, Tomate de punzada, Tomatillo |
| Nightshade, ... (2) Divine Nightshade Black Nightshade Buffalobur Nightshade Brazilian Nightshade Turkey-berry Nightshade Potato Tree |
-- S. nigrescens S. nigrum S. rostratum S. seaforthianum S. torvum S. verbascifolium |
-- Cielo raso, Hierba mora, Hierbamora, Mora, Rama de mulata, Tomatillo, Tsikutakua, Vara de cuete, Yerba mora Bishate, Chichiquelite, Hierba mora, Hoja de salazar, Jaltomate, Mambia, Maniloche, Potsekuaricho, Quebrapalto, Quelite, Tomatillo, Tucupachexacua, Tumiar, Tzicuaro chichira, Tzucuarini, Veneno de cuervo, Yerba mora, Zopilothacuatl Duraznillo, Mala mujer, Manca mula, Ojo de toro Hiedro, Lágrimas de san pedro Berenjena, Lampazo, Lavaplato, Sosa Berenjena, Berenhenilla, Galantea, Malabar, Yerba Mora |
| Noni, Indian Mulberry, Cheesefruit | Morinda citrifolia | Noni |
| Norway Spruce | Picea abies | Abeto rojo |
| Noseburn | -- Tragia nepetifolia T. ramosa |
-- Ortiguilla Ranuríki |
| Nutmeg, Nutmeg Flower, Coriander, Fennel Flower, Mace, Black Cumin | -- Myristica moschata M. fragans Nigella sativa |
-- Macis, Mirstica, Nuez Moscada Nuez moscada Ajenuz, Mirstica, Neguilla |
