Displaying 1276 - 1350 out of 1575 Object(s)

Per Page

• 25
• 50
• 75

Term	Definition
Seed wing unilateral	The seeds of species of Allantoma and Cariniana have wings that arise from one side.
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).
Seedling	Referring to a stage in a plant's development between seed germination and the production of eophylls (= the first true leaves).
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.
Self-incompatible	Referring to a plant in which pollen from a plant cannot fertilize ovules of the same plant. Compare with self-compatible.
Self-pollination	Pollination of a flowers with pollen from the same flower or from another flower on the same plant.
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.
Semilla	El óvulo maduro que contiene al embrión
Semilla alada en circunferencia	Se refiere a una semilla rodeada por un estructura similar a un ala
Sepal (sepals)	A segment of the calyx.
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.
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.
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.
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.
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.
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.
Septal unit head	The expanded apical part of a septal unit which includes the head proper and many include two septal unit head extensions.
Septal unit head extension	Referring to basal extensions from a septal unit head to which the ovules are attached.
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.
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.
Septate	Referring to a structure divided into chambers by partitions (septa); e.g., septate trihcomes.
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
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).
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.
Serrate (diminutive = serrulate)	Having a margin with sharp teeth oriented toward the apex of the structure bearing them.
Sésil	Se aplica a hojas, inflorescencias y flores que carecen de peciolos, pedúnculos o pedicelos, respectivamente
Sessile	Stalkless, as in some leaves, inflorescences, and flowers. Same as petiole absent.
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).
Shoot apex	That part of the stem of a seedling above the point of attachment of the cotyledons. Same as epicotyl.
Short shoot	A condensed branchlet bearing leaves at the apex. The shoots are usually covered aggregated scars.
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.
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.
Silicle	A fruit similar to a silique but scarcely, if at all, longer than wide, characteristic of some species of Brassicaceae. Compare with silique.
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.
Simpétala	Se dice de la flor o corola que tiene los pétalos fusionados, al menos en parte. Equivalente a gamopétala. Opuesta a polipétala
Simple	Referring to an organ, such as a leaf, that is not divided into smaller units. Opposite of compound.
Simple leaf	Referring to a leaf that is not divided into smaller units. Opposite of compound.
Sinuate	Possesssing a wavy or undulate margin.
Sinuate	Possesssing a wavy or undulate margin.
Sinus	The space or recess between two lobes of a leaf, petal, or other expanded organ.
Slash	A slanted cut through the bark that reveals charcters useful in field identification of trees.
Slash	A slanted cut through the outer and inner barks that reveals characters useful in tree identification.
Smooth	A part of a plant, such as the bark or hypanthium, that does not have furrows or conspicuous outgrowth
Smooth	With a plane surface, e.g., without bumps (tuberculate), ribs (costate), wings (alate), or grooves (sulci).
Smooth hypanthium	A hypanthium that does not have furrows or conspicuous outgrowths.
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.
Solitary flower (inflorescence)	Referring to the presence of a single flower in an inflorescence.
Somatic	Referring to plant cells other than reproductive cells (eggs and sperm).
Sorus (plural = sori)	An outgrowth of a fern frond that covers the sporangia.
Spadix (plural = spadices)	A congested spike with very small flowers that often is subtended by a spathe; e.g., the inflorescences of Araceae.
Spathe	A conspicuous bract that subtends or surrounds a spadix; in the Araceae, the lower part is called the tube and the upper part the blade; in Arecaceae the large, often woody bract derived from either the prophyll or peduncular bract.
Spatulate (spathulate)	Shaped like a spatula, rounded above and narrowed to the base.
Spike	An indeterminate, unbranched inflorescence with sessile flowers and the uppermost flowers the youngest. Compare with raceme.
Spikelet	A small secondary spike, such as the basic unit of the inflorescence of Cyperaceae and Poaceae; a spikelike branch of a compound inflorescence of the Bromeliaceae.
Spine	A sharp-pointed modified leaf as in most species of Cactaceae . In the palm family (Arecaceae) all sharp outgrowths, regardless of origin, are called spines.
Splitter	A person (usually a plant taxonomist) that recognizes species of plants with narrow morphological variation included in their concept of species. This often results in the recognition of species based on features that would be considered intraspecific variation by lumpers. This narrow concept of species is called splitting of species.
Spongy mesophyll	Referring to loosely group, unorganizedof cells located located between the palisade mesophyll and the abaxial epidermis. Photosynthesis takes place in both palisade and spongy mesophyll.
Sporangium (plural = sporangia)	A chamber in which spores are produced.
Spore	A reproductive cell produced by non-flowering plants (e.g., mosses, liverworts, ferns) and fungi).
Sporophyte	The spore-producing, diploid (2n) phase of a plant’s life cycle. Compare with gametophyte.
Sport	An offshoot of a branch or other part of a plant that is morphologically different from the remainder of the plant.
Spreading aril	Referring to an aril that spreads around the entire seed and, thus, looks like a sarcrotesta.
Sprout	A secondary shoot arising from the base of a tree or shrub. Preferred over sucker.
Spur	A tubular, usually nectar-producing outgrowth of a part of a flower; e.g., part of the sepal in some Vochysiaceae.
Squama (pl. = squamae, diminutive = squamella, adj. = squamate)	Scale; covered with scales.
Squama (plural = squamae, diminutive = squamella, adjective = squamate)	A scale.
Stalked vestigial stamens	Vestigial stamens that are constricted at the point they are attached to the ligule.
Stamen	The male part of the flower comprised of the filament and the anther; in the Lecythidaceae stamens are found attached to the staminal tube in those genera that have one (Allantoma, Cariniana, Grias, and Gustavia) and, as far is known, to the staminal ring of species with zygomorphic flowers. Stamens associated with the ligule are hypothesized to be staminodes bearing antherodes and not anthers.
Stamen	The male part of the flower comprised of the filament and the anther.
Stamens	The male part of the flower comprised of the filament and the anther.
Staminal lip	A rim around the adaxial side of the staminal ring.
Staminal rim	The upper edge of the staminal tube in species of Allantoma, Cariniana, Grias, and Gustavia.
Staminal rim oblique	The circular apex of a fleshy staminal tube upon which the stamens arise from slightly different levels, e.g., in some species of >Grias.
Staminal ring	A ring of stamens surrounding the pistil at the summit of the ovary.
Staminal ring lip	In zygomorphic-flowered Lecythis, a flap of tissue that extends beyond the insertion of the stamens on the lateral and anterior parts of the staminal ring.

• First
• Previous
• Page / 21
• Next
• Last