Displaying 1276 - 1325 out of 1575 Object(s)
| Term | Definition | |
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| Seed wing unilateral | The seeds of species of Allantoma and Cariniana have wings that arise from one side. |
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| Seedling | A young plant that develops from a germinating seed, i.e., including the embryo, cotyledons (if they are present), and the first true leaves (eophylls). |
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| Seedling | Referring to a stage in a plant's development between seed germination and the production of eophylls (= the first true leaves). |
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| Self-compatible | Referring to a plant in which pollen from a plant can fertilize eggs of the same plant; i.e., a plant that can be self-fertilized. Compare with self-incompatible. |
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| Self-incompatible | Referring to a plant in which pollen from a plant cannot fertilize ovules of the same plant. Compare with self-compatible. |
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| Self-pollination | Pollination of a flowers with pollen from the same flower or from another flower on the same plant. |
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| Semelpary (semelparic or semelparous) | Referring to plants that die after a single episode of flowering and fruiting; e.g., many bambusoid Poaceae and Tachigali (Fabaceae). Same as hapaxanthic and semelparic and opposite of iteroparic, pleionanthic, or polycarpic. |
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| Semilla | El óvulo maduro que contiene al embrión |
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| Semilla alada en circunferencia | Se refiere a una semilla rodeada por un estructura similar a un ala |
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| Sepal (sepals) | A segment of the calyx. |
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| Septal arms present | An extension from the apex of the lower placentae that appears like arms in medial longitudinal section but in an entire flower are conical around the lower part of the stylar chamber. |
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| Septal arms vestigial | Lack of an extension from the apex of the lower placentae that appears like arms in medial longitudinal section but in an entire flower are conical around the base of the stylar canal. |
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| Septal unit | The shape of a section of a septum, including both the septal unit stalk and the septal unit head, as viewed in a cross section through the placenta. |
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| Septal unit anchor-shaped | A type of septal unit headin which the sepal unit expands at the apex to form a broad and rounded head that appears somewhat like an anchor. |
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| Septal unit arrowhead-shaped | A triangular septal unit head that is extended from each side of the base of the septal head proper to form what looks like an arrowhead when viewed in a cross-section of the ovary at slightly below the apex of the placenta. |
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| Septal unit double bit axe-shaped | A type of septal unit which septal unit that possesses a truncate septal unit head and two basal extension and looking like a double bit axe in cross section. |
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| Septal unit head | The expanded apical part of a septal unit which includes the head proper and many include two septal unit head extensions. |
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| Septal unit head extension | Referring to basal extensions from a septal unit head to which the ovules are attached. |
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| Septal unit spear-shaped | A septal unit shape with septal unit head triangular and the base ob-triangular such that it appears spear-shaped as seen in a cross-section of the ovary. In this type of septal unit, all sides of the septal unit head are slanted in orientation but the basal sides are usually, but not always, shorter than the apical sides. Species that have equal sides, i.e. appearing like a diamond, are also classified as spear-shaped. |
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| Septal unit stalk | The part of the septum from its departure from the wall of the locule to the point at which it expands into the septal unit head. |
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| Septate | Referring to a structure divided into chambers by partitions (septa); e.g., septate trihcomes. |
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| Septum (pl. = septa) | A wall-like partition of a locule of an ovary that divides the ovary into chambers called locules. The septae are made up of the walls of adjacent carpels |
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| Septum (plural = septa) | A a wall-like partition of a locule of an ovary or of a fruit (then same as dissepiment and preferred over it). |
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| Serrada, serrado (diminutivo = serrulada, serrulado) | Se refiere a la láminas que tienen márgenes con dientes agudos orientados hacia el ápice. Compárese con dentada y erosa. |
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| Serrate (diminutive = serrulate) | Having a margin with sharp teeth oriented toward the apex of the structure bearing them. |
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| Sésil | Se aplica a hojas, inflorescencias y flores que carecen de peciolos, pedúnculos o pedicelos, respectivamente |
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| Sessile | Stalkless, as in some leaves, inflorescences, and flowers. Same as petiole absent. |
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| Shingle leaves | Broadly overlapping, simple, juvenile leaves that are markedly different from adult leaves of the same species; e.g., in certain species of Araceae and Marcgravia spp. (Marcgraviaceae). |
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| Shoot apex | That part of the stem of a seedling above the point of attachment of the cotyledons. Same as epicotyl. |
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| Short shoot | A condensed branchlet bearing leaves at the apex. The shoots are usually covered aggregated scars. |
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| Shrub | A woody plant that is branched at the base or unbranched but less than 2 meters tall. The difference between unbranched shrubs and treelets is sometimes unclear. Compare with treelet and tree. |
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| Shrub layer | A hypothetical stratum in rainforest forest consisting of shrubs and very small trees of tropical rain forest which is located between the ground layer and the understory tree layer. Compare with understory and emergent. |
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| Silicle | A fruit similar to a silique but scarcely, if at all, longer than wide, characteristic of some species of Brassicaceae. Compare with silique. |
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| Silique | An elongate (usually more than twice as long as wide) capsular fruit with two seed chambers and a persistent replum, characteristic of some species of Brassicaceae. Compare with silicle. |
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| Simpétala | Se dice de la flor o corola que tiene los pétalos fusionados, al menos en parte. Equivalente a gamopétala. Opuesta a polipétala |
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| Simple | Referring to an organ, such as a leaf, that is not divided into smaller units. Opposite of compound. |
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| Simple leaf | Referring to a leaf that is not divided into smaller units. Opposite of compound. |
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| Sinuate | Possesssing a wavy or undulate margin. |
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| Sinuate | Possesssing a wavy or undulate margin. |
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| Sinus | The space or recess between two lobes of a leaf, petal, or other expanded organ. |
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| Slash | A slanted cut through the bark that reveals charcters useful in field identification of trees. |
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| Slash | A slanted cut through the outer and inner barks that reveals characters useful in tree identification. |
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| Smooth | A part of a plant, such as the bark or hypanthium, that does not have furrows or conspicuous outgrowth |
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| Smooth | With a plane surface, e.g., without bumps (tuberculate), ribs (costate), wings (alate), or grooves (sulci). |
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| Smooth hypanthium | A hypanthium that does not have furrows or conspicuous outgrowths. |
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| Soft bast | The outer functional part of the xylem, i.e., the living part of the xylem that transports water and nutrients to the leaves. Same as sapwood. |
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| Solitary flower (inflorescence) | Referring to the presence of a single flower in an inflorescence. |
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| Somatic | Referring to plant cells other than reproductive cells (eggs and sperm). |
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| Sorus (plural = sori) | An outgrowth of a fern frond that covers the sporangia. |
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| Spadix (plural = spadices) | A congested spike with very small flowers that often is subtended by a spathe; e.g., the inflorescences of Araceae. |
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