_Naked_, wanting some usual covering, as achlamydeous flowers, 86; gymnospermous seeds, 109, 125, &c. _Names_ in botany, 179. _Nanus_, Latin for dwarf. _Napiform_, turnip-shaped, 35. _Natural System_, 182. _Naturalized_, introduced from a foreign country, and flourishing wild. _Navicular_, boat-shaped, like the glumes of most Grasses. _Necklace-shaped_, looking like a string of beads; see _moniliform_. _Nectar_, the sweet secretion in flowers from which bees make honey, &c. _Nectariferous_, honey-bearing; or having a nectary. _Nectary_, the old name for petals and other parts of the flower when of unusual shape, especially when honey-bearing. So the hollow spur-shaped petals of Columbine were called nectaries; also the curious long-clawed petals of Monkshood, 87, &c. _Needle-shaped_, long, slender, and rigid, like the leaves of Pines. _Nemorose_ or _Nemoral_, inhabiting groves. _Nerve_, a name for the ribs or veins of leaves when simple and parallel, 50. _Nerved_, furnished with nerves, or simple and parallel ribs or veins, 50. _Nervose_, conspicuously nerved. _Nervulose_, minutely nervose. _Netted-veined_, furnished with branching veins forming network, 50, 51. _Neuter_, _Neutral_, sexless. _Neutral flower_, 79. _Niger_, Latin for black. _Nigricans_, Latin for verging to black. _Nitid_, shining. _Nival_, living in or near snow. _Niveus_, snow-white. _Nodding_, bending so that the summit hangs downward. _Node_, a knot; the "joints" of a stem, or the part whence a leaf or a pair of leaves springs, 13. _Nodose_, knotty or knobby. _Nodulose_, furnished with little knobs or knots. _Nomenclature_, 175, 179. _Normal_, according to rule, natural. _Notate_, marked with spots or lines of a different color. _Nucamentaceous_, relating to or resembling a small nut. _Nuciform_, nut-shaped or nut-like. _Nucleus_, the kernel of an ovule (110) or seed (127) of a cell. _Nucule_, same as nutlet. _Nude_, (Latin, _Nudus_), naked. So _Nudicaulis_, naked-stemmed, &c. _Nut_, Latin _Nux_, a hard, mostly one-seeded indehiscent fruit; as a chestnut, butternut, acorn, 121. _Nutant_, nodding. _Nutlet_, a little nut; or the stone of a drupe. _Ob-_ (meaning over against), when prefixed to words signifies inversion; as, _Obcompressed_, flattened the opposite of the usual way; _Obcordate_, heart-shaped, with the broad and notched end at the apex instead of the base, 54; _Oblanceolate_, lance-shaped with the tapering point downwards, 52. _Oblique_, applied to leaves, &c., means unequal-sided. _Oblong_, from two to four times as long as broad, 52. _Obovate_, inversely ovate, the broad end upward, 53. _Obovoid_, solid obovate. _Obtuse_, blunt or round at the end, 54. _Obverse_, same as _inverse_. _Obvolute_ (in the bud), when the margins of one piece or leaf alternately overlap those of the opposite one. _Ocellate_, with a circular colored patch, like an eye. _Ochroleucous_, yellowish-white; dull cream-color.