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Term	Definition
Bilabiada, bilabiado	Estructura que posee dos labios. Usualmente se refiere a los cálices y corolas zigomorfas, como las de las Lamiaceae.
Bilabiate	Two-lipped, usually referring to zygomorphic calyces and corollas such as those found in the Lamiaceae.
Bilabiate capitulum (head)	Inflorescence of Asteraceae with at least some bilabiate flowers. Restricted to tribe Mutisieae.
Bilaterally symmetric	Capable of being divided only into two equal parts; a structure (e.g., a flower) in which a line drawn through the middle will produce a mirror image of one side of the line to the other side of the line. Opposite of actinomorphic; same as bilaterally symmetrical and irregular.
Bilaterally symmetrical flower	A flower capable of being divided into only two equal parts (mirror images) by a line passing through the middle of a flower, i.e., other lines passing the middle of the flower will not give mirror images of one another; same as zygomorphic, monosymmetric, and irregular flowers and opposite of actinomorphic, monosymmetric, radially symmetrical, and regular flowers. This term can refer to other plant parts as well.
Bilocular	Having two locules.
Binomial nomenclature	A system used to name plants devised by Linnaeus in 1753 in his Systema Plantarum in which a two-parted name is given to a species of plant, i.e., the genus and the species. For example, Lecythis ollaria L. is a binomial name assigned by Linnaeus to this species.
Binucleate pollen	Referring to pollen grains that have two nuclei when shed from the anthers. Compare with trinucleate pollen.
Biofilm	A thin layer of living tissue found between a plant body and the substrate.
Biota	The totality of organisms found in a given environment.
Bipartite	Split into two parts.
Bipinnada	Dos veces pinnada; por ejemplo, las hojas de muchas especies de Fabaceae-Mimosoideae. Ver pinnada
Bipinnate, bipinnately compound	Twice-pinnate; e.g., leaves of many species of Fabaceae-Mimosaceae. See pinnate.
Biseriado	Se aplica a un perianto que posee dos verticilos, como cuando una flor posee cáliz y corola. Comparar con uniseriado.
Biseriate	Composed of two whorls or rows; e.g., a perianth with both calyx and corolla or a hair with two rows of cells. Compare with uniseriate.
Biseriate perianth	Referring to a perianth with two whorls or rows; i. e. with both calyx and corolla. Compare with uniseriate.
Bisexual flower	Referring to a flower with a functional androecium and a functional gynoecium. Same as perfect.
Bitégmico	Se refiere a los óvulos con dos integumentos.
Biternado	Dos veces ternado, en grupos de tres. Por ejemplo, las hojas de algunas especies de Serjania (Sapindaceae).
Biternate	Twice ternate, in two groups of three each; e.g., the leaves of some species of Serjania (Sapindaceae).
Bladder	A thin-walled, inflated, small sac found in species of Utricularia. The function of these sacs is to capture very small organisms, such as mosquito larvae, which are decomposed and the nutrients (e.g., nitrogen) released are then assimilated by the plant.
Bladder-like	Sac-like, inflated structures that surrounds seeds some structure, e.g., the fruits of plants such as Staphylea trifolia.
Blade	The expanded part of the leaf supported by the petiole
Blade	The expanded portion of a leaf or other structure such as a petal; when it is a leaf the stalkt is called the petiole and when it is a petal the narrowed part is the claw. Same as lamina.
Blaze	A slanted cut through the bark that reveals charcters useful in field identification of trees.
Blaze	See slash.
Bole	In trees, the unbranched portion of the stem. Same as trunk.
Bole	The main stem of a tree between the buttresses and the crown. Compare with trunk.
Boreal	Referring to high northern latitudes, for example boreal forests the most common of which is the taiga
Boreal	Se refiere a las elevadas latitudes del norte. Por ejemplo, los bosques boreales, el mas común entre éstos es la Taiga.
Boreotropical	Término que se aplica a una región que en el pasado fue tropical, que se encuentra localizada a nivel del sur de los Estados Unidos, Caribe, sureste de Asia, y sur de Europa. Esta duró aproximadamente hasta 38 millones de años atras, cuando el clima se enfrió.
Boreotropics	A former tropical region around the earth at the level of the southern United States, Caribbean, Southeast Asia, and southern Europe, which lasted until about 38 million years ago, when the climate got cooler.
Bóstrix	Ver cima helicoide.
Bostryx (plural = bostryches)	See helicoid cyme.
Brachyblast	A short, leafless, lateral axis of limited growth that bears inflorescences.
Brachyparacytic stomata	Same as paracytic stomata.
Brachyparacytic stomata	Same as paracytic stomata
Bract	A reduced and frequently otherwise differentiated leaf often associated with inflorescences and sometimes subtending a flower.
Bract	A reduced and frequently otherwise differentiated leaf that is often associated with inflorescences and subtends the pedicels of flowers.
Bráctea	Órgano foliáceo reducido, a menudo diferente de las hojas, asociado con una inflorescencia y usualmente subtendiendo una flor.
Bracteada, bracteado	Estructura que posee brácteas.
Bracteate	Provided with bracts.
Bracteola	Bráctea pequeña, usualmente dispuesta en el pedicelo.
Bracteolas debajo de la articulación	Se refiere a aquellas bracteolas insertas debajo de la articulación en la continuación entre el pedicelo y el hipantio de las Lecythidaceae
Bracteolas sobre la articulación	Se aplica a las bracteolas que se encuentran insertadas sobre la articulación localizada entre el pedicelo y el hipantio de las Lecythidaceae.
Bracteole	A small bract usually inserted on the pedicel.
Bracteole (adj. = bracteolate)	A small bract usually inserted on the pedicel. In the Lecythidaceae bbracteoles usually are in pairs inserted on pedicels.
Bracteoles above articulation	Bracteoles inserted above the articulation in the pedicel/hypanthium continuum of Lecythidaceae.
Bracteoles above articulation	Bracteoles inserted above the bracteoles in the pedicel/hypanthium continuum of Lecythidaceae.
Bracteoles below articulation	Bracteoles inserted below the articulation in the pedicel/hypanthium continuum of Lecythidaceae.

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