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Term	Definition
Embryo macropodial (= cotyledons absent)	Massive embryo that shows no obvious cotyledons. Cotyledons absent is the preferred term.
Embryo sac	The female gametophyte of angiosperms (flowering plants). Same as megagametophyte.
Embryotega	A small circular thickening near the seed scar on the seeds of some plants; e.g., Commelinaceae.
Emergent aquatic plant	A plant rooted under water but with the upper parts emerging above the surface.
Emergent tree	A species of tree in which adult individuals exceed the more or less continuous canopy layer of a forest.
Emergent tree layer	A hypotherical layer in tropical forests made up of species of the tallest trees with crown emerging above the canopy tree layer.
Emergente	Árbol del bosque cuya copa sobresale del dosel superior. Este término también se aplica a las plantas acuáticas cuyas partes y órganos emergen sobre la superficie del agua.
Empheral	A temperate zone plant that sends out leaves and photosynthesizes in the spring before the leaves of the trees appear. During this time the plant produces and stores enough carbohydrate to allow it to flower the following spring. Not long after flowering, the plant wilts and remains inconspicuous until the next spring.
Enantiostylous	Referring to different flowers on the same plant, some with styles protruding to the right and others to the left of the main axis; i.e., to opposite sides of the axis.
Enation	A projection or outgrowth from the surface of an organ.
Enclosed bud	A bud that is either completed surrounded by the calyx or that has a pore-like or slit-like opening at early developmental stages.
Endemic	Native to and restricted to a given geographic region or to a given soil type or other habitat.
Endoaperture	The internal part of the opening into a pollen grain. Compare with ectoaperture.
Endocarp	The innermost layer of the fruit wall. Compare with pericarp.
Endocarp buttress	A raised, somewhat rounded ridge running the length of the endocarp in the fruits of species of Grias.
Endophyte	A plant living partially or entirely within another plant.
Endosperm	The energy-rich food supply of the seed that is formed by the fusion of the sperm and polar nuclei of the female gametophyte, initially surrounds the embryo, and is often apparent in the seed; some seeds, however, do not have any apparent endosperm.
Endosperm	The energy-rich food supply of the seed that is formed by the fusion of the sperm and polar nuclei of the female gametophyte, initially surrounds the embryo, and is often apparent in the seed; some seeds, however, do not have any apparent endosperm.
Endosperma celular	Tipo de desarrollo del endosperma en el que las paredes celulares se desarrollan comenzando con la primera división celular.
Endosperma helobial	Tipo de endosperma en el que dos células desiguales se desarrollan de manera distinta. La célula más grande se desarrolla de manera no celular (ver endosperma nuclear), y la célula más pequeña se desarrolla de varias maneras.
Endosperma ruminado	Testa o cubierta de la semilla que se encuentra invaginada hacia el interior del endosperma. Por ejemplo, en muchas especies de Annonaceae, Myristicaceae, y Arecaceae.
Endozoochorous	A type of seed dispersal in which the diaspore is ingested and passes unharmed through the digestive tract of an animal.
Ensiform	Sword-shaped.
Entire	Referring to a margin of a leaf, sepal, or petal that is not interrupted by teeth or lobes.
Eófilo	Es la primera hoja verdadera que produce una plántula; la primera hoja que aparece después de el o los cotiledones
Eophyll	The first true leaf of a seedling; i.e., the first leaf to appear after the cotyledon(s).
Eophyll	The first leaves of a seedling, other than cotyledons, which may or may not be similar to adult leaves in form and position.
Ephemeral	Lasting a short time; for example, a spring emphemeral in temperate regions that flowers and sets fruits before the canopy trees leaf out or a tree such as species of Tabebuia that flower for only a few days, thus the flowers are ephemeral. Same as evanescent.
Epi-	A prefix meaning “upon.”
Epicalyx	A whorl of bracts on the pedicel, similar to sepals, and inserted below the calyx; most commonly found in species of Malvaceae..
Epicarp	Same as exocarp.
Epichile	In the Orchidaceae, the apical portion of a complex lip.
Epicortical roots	In some Eremolepidaceae and Loranthaceae, roots that develop from the cortex of the stem to form secondary points of attachment to the host.
Epicotyl	That part of the main axis of an embryo or the young stem of a seedling located above the point of attachment of the cotyledons. The epicotyl gives rise to the leaves, the first of which are called eophylls.
Epicotyl	That part of the main axis of an embryo or the young stem of a seedling located above the point of attachment of the cotyledons. The epicotyl gives rise to the leaves, the first of which are called eophylls.
Epidermal cells	Referring to the outermost cells of the adaxial and abaxial leaf blade surfaces which are covered by cuticle. Subsidiary cells surround the stomates and are distinguished from normal epidermal cells in their size, shape, or orientation. A stomatal type in which the cells surrounding the guard cells are not differentiated from the epidermal cells is called the anomocytic type.
Epidermal cells	Referring to the outermost cells of the adaxial and abaxial leaf blade surfaces which are covered by cuticle. Subsidiary cells surround the stomates and are distinguished from normal epidermal cells in their size, shape, or orientation. A stomatal type in which the cells surrounding the guard cells are not differentiated from the epidermal cells is called the anomocytic type.
Epidermis	The outer layer of cells of a plant.
Epífita	Se aplica a una planta que crece sobre otra planta durante todo su ciclo de vida, sin parasitarla. Las epífitas poseen raíces aéreas y utilizan a la planta hospedera sólo para obtener un soporte donde desarrollarse, sin tomar agua ni alimento del hospedero (e.g. Tillandsia [Bromeliaceae], Oncidium [Orchidaceae]).
Epigeal germination	Referring to a type of seed germination in which the cotyledons are held at or above the ground. Compare with hypogeal.
Epigeous	Referring to the above-ground parts of a plant.
Epigynous ovary	Referring to a flower in which all or some of the floral parts (i.e., the sepals, petals, and stamens) arise from the summit of the ovary; e.g., species of Asteraceae and Rubiaceae.
Epilithic	Growing on rocks. Same as epipetric.
Epilítica	Se refiere a una planta que crece sobre rocas. Igual a litófita
Epipeltate anther	An anther with the filament attached above the base and with the part of the anther that is prolonged downward facing toward the center of the flower; e.g., in the Dracaenaceae.
Epipétala, epipétalo	Se refiere a estructuras, usualmente estambres, que están insertos de manera opuesta o de frente a los pétalos
Epipetric	Growing on rocks. Same as epilithic
Epiphyllous inflorescence	Inflorescences from the adaxial surfaces of the petiole (e.g., Dichapetalaceae) or the blade (e.g., Phllonomaceae).
Epiphyte	Referring to a plant that grows on another plant for its entire life cycle. An epiphyte often possesses aerial roots, uses the host plant only for support, and does not obtain food or water from the host, e.g., Tillandsia and many other bromeliads, the majority of the species of Araceae in tropical forests, and most of the orchids in tropical forests.
Episépala, episépalo	Se refiere a estructuras, usualmente estambres, que están insertos de manera opuesta o de frente a los sépalos

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