Displaying 2851 - 2900 out of 3058 Object(s)

Per Page

• 25
• 50
• 75

Term	Definition
Tetragonal	Four-angled.
Tetraploid	Having double the normal number of chromosomes, in this case the chromsome number is listed as 4N.
Thallus (adj. = thalloid)	A generalized term used to describe the prostrate axis of a plant that is not differentiated into stem, leaf, and root.
Theca (plural = thecae)	The chamber of an anther in which the pollen is produced.
Thorn	A sharp-pointed, aborted branch that is woody and has vascular tissue.
Three-ranked	See tristichous.
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.
Thyrse	An inflorescence in which the main axis is indeterminate and the lateral axes are determinate; i.e., a raceme of cymes.
Thyrsiform	Like a thyrse.
Tierra firme	A Spanish term referring to land not subject to periodic flooding. Same as terra firme in Portuguese.
Tomentose (diminutive = tomentellous)	Densely woolly; with a soft, wool-like pubescence.
Tomentum	A covering of short, soft, matted, or tangled hairs.
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.
Translator (=translator arm)	In the Apocynaceae subfamily Asclepiadoideae and Orchidaceae, the structure connecting the pollinia to the gland. Same as caudicle.
Translocate	Referring to the movement of sucrose though the phloem from the leaves to other parts of the plant.
Translucent	Transmitting light.
Transverse section	A cut at right angles to the axis of an organ. Same as cross section.
Transverse section	Same as a cross section.
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.
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.
Trapeziform	In the shape of a four-sided figure with only two parallel sides (a trapezoid).
Tree	An erect, usually single-stemmed, woody plant 5 centimeters or more dbh (diameter at breast height); some trees may have multiple trunks but at least some of the trunks are 5 centimeters or more in diameter. Compare with treelet.
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.
Treelet	An erect, single-stemmed, woody plant less than 5 centimeters dbh and more than 2 meters tall; differences between treelets and unbranched shrubs or trees are sometimes unclear. Compare with shrub and tree.
Trepadora herbácea	Planta leñosa trepadora. Comparar con liana.
Tri-	A prefix meaning three.
Triad	In palms, a group (structurally a short cincinnus) of two lateral staminate flowers and a central pistillate flower.
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.
Trichome	A hair-like outgrowth of the epidermis. In botany, trichome is preferred over the use of hair.
Trichome	A hair-like outgrowth of the epidermis. In botany, trichome is preferred over the use of hair.
Trichomes	Any structure arising from the epidermis (surface) of a plant; the equivalent to hairs in an animal.
Trichomes in axillary tufts	Trichomes (the equivalent of hairs in the animal kingdom) usually located in the axils between the midribe and the secondary veins, e.g., in Quercus velutina (black oak).
Trichosclereid	A branched schlerenchymatous cell with thin, hairlike extensions into the intercellular spaces.
Trichotomy	A division into three parts.
Tricolpate	Referring to a pollen grain with three colpi.
Tricolporate	Referring to a pollen grain with three pores situated within three colpi.
Tricomas	Cualquier estructura que emerge de la epidermis (superficie) de una planta. Equivalente a pelos en los animales
Tricomas Malpighiáceos	Pelos unicelulares, adpresos y unidos en la mitad a una superficie; común en las Malpighiaceae, en las que pueden ser en forma de "T" o "Y"
Tricomas T	Se refiere a los tricomas con forma de "T" o "Y", que están unidos en la mitad por un pedículo
Tridioecious	Referring to the sexual condition of a species that bears only staminate flowers on some plants, only pistillate flowers on some plants, and staminate plus pistillate flowers or bisexual flowers on other plants.
Trifid	Split into three parts.
Trifoliolate	With three leaflets.
Trigger hairs	Extensions placed at the opening (trap door) into the bladder of bladderworts (Utricularia sp.) which, when touched by prey cause the trap door of the bladder to open causing the prey to be sucked into into the bladder. The prey is decomposed and its nutrients, such as nitrogen, are assimilated by the plant.
Trigonous	Three-angled.
Trilocular	With three locules; e.g., an ovary.
Trimonoecy (trimonoecious)	Referring to the sexual condition of a species that bears staminate, pistillate, and bisexual flowers on the same plant. Same as polygamomonoecious.
Trinucleate pollen	Referring to pollen grains that have three nuclei when shed from the anthers. Compare with binucleate pollen.
Tripinnately compound leaf	A compound leaf divided into three parts, each of which is pinnately compound.
Triplivenation	With three ± equal, longitudinal veins departing from the base of a leaf blade.
Triquetrous	Triangular in transverse section.

• First
• Previous
• Page / 62
• Next
• Last