naked: lacking various organs or appendages; a naked flower lacks a perianth.

napiform: turnip-shaped.

naturalized: well established, but originally introduced from another area.

navicular: boat-shaped.

nectary (2 images): any structure that produces nectar.

nectiferous: producing nectar.

nerve: a prominent longitudinal vein of a leaf or other organ.

neutral flower: one that has neither stamens nor pistil.

nigrescent: blackish, or becoming black.

node: a place on a stem where a leaf is (or has been) attached.

nodose: knobby, generally used in describing roots.

nodulose: diminutive of nodose.

nude: naked; uncovered.

nut (16 images): a hard, dry, indehiscent, generally 1-seeded fruit.

nutlet (14 images): diminutive of nut; a very thick-walled achene; 1 of the dry, indehiscent, 1-seeded half-carpels of the Boraginaceae.