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Myrmecophory
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Referring to ants that carry away diaspores from parent plants. The ants are usually attracted to fleshy structures associated with seeds. Same as ant dispersal. |
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Myrmecophyte
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Referring to a plant with a symbiotic relationship with ants; in the Orchidaceae, this normally refers to a plant which has a specific species of ant inhabiting the roots or other structure such as the pseudobulb, e.g. in Calaurthron billamelatum, the pseudobulb is hollow and inhabitated by ants; in Tococa guianensis (Melastomataceae), the bases of the leaves have domatia which are inhabited by ants. |
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Myrtoid embryo
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A variable type of embryo found in the Myrtaceae in which the hypocotyl is the same length or much longer than the cotyledons; in genera with hard seed coats, the embryo is C-shaped; in genera with membranous or submembranous seed coats, the hypocotyl often is greatly swollen, and sometimes the whole embryo forms a spiral. Compare with eugenioid embryo and myrcioid embryo. |
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Naked
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Referring to a situation in which a part that is usually present is absent, for example, the the translation of gymnosperm is "naked seed" because the ovules and subsequent seeds are not enclosed in an ovary. |
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Narrowly elliptic
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Referring to a two-dimensional shape with the widest point at the middle and a length to width ratio 3:1 to less than 6:1. |
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Narrowly oblanceolate
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Narrowly oblanceolate refers to a leaf, sepal, petal, or other flat structure that is wider above the midpoint and has a length-to-width ratio of greater than 6:1. |
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Narrowly oblong
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Referring to a two dimensional shape in which the greatest width extends throughout a middle zone at least one-third the length of the blade (in this zone the margins are more-or-less parallel) and the length to width ratio is 3:1 to less than 6:1. |
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Narrowly obovate
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Narrowly obovate refers to a leaf, sepal, petal, or other flat structure that is wider above the midpoint and has a length-to-width ratio of 2:1 to less than 3:1. |
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Narrowly ovate
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Narrowly ovate refers to a leaf, sepal, petal, or other flat structure that is wider at the base than at the midpoint, tapers toward the apex, and has a length-to-width ratio of 2:1 to less than 3:1. |
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Naturalized
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Referring to an organism that is established and reproducing in areas outside of its native range, e.g., the African tulip tree (Spathodea campanulata) which is native to Africa but naturalized in the Caribbean and elsewhere. |
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Nectar
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A sugar solution of varied composition produced by nectaries within flowers to attract pollinators or by extrafloral nectaries to attract insects that protect the plant from predation. |
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Nectar chamber
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A chamber at the apex of the coils of zygomorphic-flowered species or at the base of the staminal tube of most Old World species and in some actinomorphic-flowered genera in the New World, e.g., for example of species of Grias. The nectar that accumulates in the nectar chambers serves as the reward that attracts pollinators to the flowers. |
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Nectar guide
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Markings on a flower that apparently serve to guide pollinators to the nectar. Some are visible to humans, but others are apparent to humans only through ultraviolet photography. Same as honey guide, a term not recommended because bees, not plants, produce honey. |
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Nectar guide
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Markings on a flower that apparently serve to guide pollinators to the nectar source which is the reward they receive for visiting the flower. Some are visible to humans, but others are apparent to humans only through ultraviolet photography. Same as honey guide, a term not recommended because bees, not plants, produce honey. |
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Nectar spur
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A tubular-like projection from the sepals or petals that produce and retain nectar as a reward for pollinators; in many orchids nectar spurs are hollow, tubular projections formed at the base of the lip which contain nectar rewards for pollinators. |
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Nectariferous disc
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A more or less fleshy and elevated part of the receptacle, situated between the perianth and the stamens or between the stamens and the gynoecium, which functions in the production of nectar. Also referred to simply as a disc. |
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Nectary
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A tissue or structure of flowers that produces nectar. |
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Nectary (pl. = nectaries)
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A nectar-producing structure within the flowers of some genera of neotropical Lecythidaceae. |
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Nectary scale
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A appendage (bracteole-like) located between the flowers of some Capparidaceae upon which the nectary gland (= nectary) is located. |
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Neotropics (adj.= neotropical)
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Referring to that part of the earth in the New World between the Tropic of Cancer at 23 degrees 27 minutes N and the Tropic of Capricorn at 23 degress 27 minutes S. These are the northern and southern latitudes at which the sun can be directly overhead at some time during the year. Same as New World tropics. |
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Nervio primario
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Ver nervio principal |
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Nervio principal
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Es el nervio primario de una hoja, bráctea, sépalo o pétalo. Equivalente a costa. |
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Nervios palmeados
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Se refiere a la disposición radial de los nervios en una lámina, en la que los nervios nacen de un punto común cerca de la base |
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Nervios secundarios
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Son aquellos nervios que nacen del nervio primario en una hoja. Equivalente a nervios laterales |
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New combination (= combination novum.)
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A named formed from a previous name. Usually a new combination involves moving a species epithet from one genus to another genus. For example, the species Cariniana decandra Ducke was considered to be a species of Allantoma by Huang et al. ((2008) so they coined the new combination Allantoma decandra (Ducke) Huang et al.. Note that the name of the author of the original name is retained in parentheses as part of the new name. |
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