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Ex-
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A prefix meaning lacking (e.g., exstipulate), outside of (e.g., exocarp), or away from (e.g., exmedial). |
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Exalbuminous
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Without albumen. |
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Excurrent secondary vein
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Referring to a secondary vein that goes directly into the midrib without turning either basally or distally along the midrib. |
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Exfoliate
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Referring to layers that peel off another structure, for example bark that peels off a tree trunk. |
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Exine
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The outer layer of the two-layered wall of a pollen grain. Compare with intine. |
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Exmedial
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Away from the leaf axis. |
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Exmedial
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Away from the leaf axis, i.e., away from the midrib. |
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Exocarp
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The outermost layer of the fruit wall. Same as epicarp; compare with pericarp. |
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Exostome
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That part of the seed coat surrounding the micropyle. |
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Exserted
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Extending beyond, as stamens beyond the corolla. Opposite of included. |
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Exstipulate
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Without stipules. Same as estipulate. |
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External flap
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In the Lecythidaceae, a flap that extends outward from the inner coil of the androecial to cover at least part of the top of the androecial hood. This structure is only fully developed in species of Couratari although incipient external flaps are found in several species of Eschweilera (e.g., Eschweilera cyathiformis and E. ovalifolia). |
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External flap
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A flap that extends outward from the inner coil of the androecium to cover at least part of the top of the androecial hood. This structure is only fully developed in species of Couratari although incipient external flaps are found in several species of Eschweilera (e.g., Eschweilera cyathiformis and E. ovalifolia). In these species, the furrow is called the ligular sulcus. |
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Extinction
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The death of all individuals of a species. |
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Extirpation
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The process by which a plant or animal species is eliminated from a given geographic area. |
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Extra-
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A prefix meaning outside of, beyond, apart from, besides, in addition to. |
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Extrafloral nectary
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A structure that secretes nectar and is located on a part of the plant other than the flower; e.g., the glands on the petioles of many mimosoid legumes. |
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Extrastaminal
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Outside of the stamens; e.g., the discs of Sapindaceae. |
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Extrastaminal disc
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A fleshy, lobed, or annular nectariferous structure found within flowers located outside of the stamens. Preferred spelling is disc. Not to be confused with disk flower. |
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Extrorse
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Directed outward (abaxially), as the dehiscence of an anther. Compare with introrse and latrorse. |
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Exudado
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Cualquier substancia líquida que emana de una planta cuando es cortada; por ejemplo, látex, savia o resina |
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Exudate
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Any liquid substance emitted from a plant when it is cut; e.g., latex, sap, or resin |
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Eyespot
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A more or less circular mark, usually on a petal that may serve as a nectar guide; e.g., often found on the standard of species of Fabaceae. |
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Falcate
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Sickle-shaped. |
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False fruits
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Fruits that develop from more than just the ovary; e.g., the outermost layer of the fruit may be derived from a hypanthium. |
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