Displaying 1451 - 1475 out of 1575 Object(s)
| Term | Definition | |
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| Terminal inflorescence | Referring to an inflorescences that arises from above the leaves |
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| Terminal leaflet | In a pinnately compound leaf, the leaflet at the end of the rachis. Note that pinnately compound leaves with terminal leaflets are imparipinnate ( = odd pinnate). |
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| Terra firme | A Portuguese term referring to land not subject to periodic flooding. Same as tierra firme in Spanish or non-inundated forest in English. |
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| Terra firme | A Portuguese term referring to land not subject to periodic flooding. Same as tierra firme in Spanish or non-inundated forest in English. |
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| Terrestrial | Growing upon the ground, referring to a plant with its root system anchored in the ground. |
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| Tertiary vein | A tertiary vein is the third thickest vein in the leaf. They arise from the secondary veins (Hickey, 1973). |
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| Tertiary venation | The third degree or third smallest veins in a leaf blade, arising from the secondary veins. |
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| Tetrad | A group of four pollen grains. |
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| Tetrad | Referring to pollen grains that remain in groups of four after meiois; in most species of flowering plants the tetrads separate into four monads immediately after meiosis. |
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| Tetradynamous | Having four long stamens and two short stamens; e.g., in Brassicaceae. |
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| Thallus (adj. = thalloid) | A generalized term used to describe the prostrate axis of a plant that is not differentiated into stem, leaf, and root. |
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| Theca (plural = thecae) | The chamber of an anther in which the pollen is produced. |
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| Thorn | A sharp-pointed, aborted branch that is woody and has vascular tissue. |
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| Thrum flower | One of two types of flowers found in some species in which the style is short and the stamens are long. Compare with pin flower; see also heterostyly. |
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| Tierra firme | A Spanish term referring to land not subject to periodic flooding. Same as terra firme in Portuguese. |
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| Tomentose (diminutive = tomentellous) | Densely woolly; with a soft, wool-like pubescence. |
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| Torus | The thickened part of a pedicel from which the flowers or fruits arise. In some accessory fruits, for example the pome and strawberry, the receptacle gives rise to the edible part of the fruit. |
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| Translator (=translator arm) | In the Apocynaceae subfamily Asclepiadoideae and Orchidaceae, the structure connecting the pollinia to the gland. Same as caudicle. |
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| Transverse section | A cut at right angles to the axis of an organ. Same as cross section. |
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| Trap door | A small opening into the bladder of bladderworts (Lentibularia spp.) the function of which is to open and suck prey into the bladder when the trigger hairs (= trigger trichomes) are touched by the prey. The prey are then decomposed and the nutrients released are assimilated by the plant. |
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| Trap line pollination | Movement of a pollinator from the flowers of one plant of a species to the flowers of another plant of the same species on a specific route that is repeated during the same day and on following days as long as the pollinator reward is sufficent to attract the pollinator. |
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| Tree climbing | Because 68% of the plants in lowland rainforests (Mori et al., 2002) are trees or plants (e.g., lianas and epiphytes) that grow along tree trunks or in the crowns of trees) it is essential to be able to climb trees. Botanists have used the following methods to physically climb trees: peconha, French tree climbing spikes called griffes, single pronged spikes usually used to climb wooden telephone poles, the Swiss tree bicyle, and rope climbing. For more information about plant collecting see Tropical Plant Collecting: From the Filed to the Internet. This book can be purchased at: http://tecceditora.com/ or Amazon.com. |
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| Trichilium (plural = trichilia) | A pad of densely clustered trichomes located at the abaxial base of the petiole of some species of Cecropia (Cecropiaceae) and containing Muellerian bodies that are a source of food for ants. |
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| Trichome | A hair-like outgrowth of the epidermis. In botany, trichome is preferred over the use of hair. |
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| Trichome | A hair-like outgrowth of the epidermis. In botany, trichome is preferred over the use of hair. |
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