tideline
A line of floating debris, seaweed etc. that marks the boundary between two surface currents.

tidelines
plural of tideline

tidemark
a line (of seaweed or differently coloured sand etc) on the shore showing the level of high or low tide
any mark showing the limit of some past activity
a line of scum left on a bath tub when the water is drained away

tidemarks
plural of tidemark

tidewrack
Seaweed and similar marine vegetation and rubbish deposited along a shore by a receding tide.

tidytips
Any of the flowering plants of the genus Layia in the daisy family; they are erect annual herbs with dark glandular stems.

tigellus
The internode of a stem.

tikor
A starch or arrowroot made from the tubers of an East Indian zinziberaceous plant related to turmeric, (Curcuma angustifolia).
The plant itself.

tikug
The stems of the plant Scirpus grossus, used in traditional weaving in the Philippines.

tilia
Any tree of the linden genus Tilia.

tilias
plural of tilia

tillandsioid
Any bromeliad of the subfamily Tillandsioideae.

tillandsioids
plural of tillandsioid

timberling
A small tree.

timberlings
plural of timberling

timbiri
A flowering tree of species Diospyros malabarica.
The wood of this tree.

timbiris
plural of timbiri

timla
The Roxburgh fig

tinet
Brushwood and thorns for making and repairing hedges.

tingi
A Brazilian tree, Magonia pubescens, whose seeds yield soap.

tinguy
Alternative form of tingi (“Brazilian tree”).

tinikling
A Philippine dance involving hopping in the gaps between moving bamboo poles.

tintenstriche
A biotic community formed by various species of cyanobacteria, lichens, and algae that stains rock faces with a black or blue color.

tipa
A tree of species Tipuana tipu

tipas
plural of tipa

tipu
A South American tree, Tipuana tipu, which is grown as an ornamental in mild-winter climates.

tipus
plural of tipu

titepati
mugwort

tithymal
Any kind of spurge, especially Euphorbia cyparissias.

tithymals
plural of tithymal

titoki
Alectryon excelsus, a New Zealand tree found in lowland forests.

titokis
plural of titoki

toad grass
Alternative form of toad-grass.

toad rush
Juncus bufonius, a common species of rush found worldwide, growing in moist and muddy places.

toad rushes
plural of toad rush

toad-grass
Toad rush (Juncus bufonius).

toadflax
Any of several European plants, of the genus Linaria, having two-lipped yellow flowers.
Any of several other plants in the family Plantaginaceae.

toadflaxes
plural of toadflax

toadgrass
Alternative form of toad-grass.

toadroot
Any of various plants of the genus Actaea.

toadrush
Alternative form of toad rush.

toadrushes
plural of toadrush

toadshade
Synonym of red toad trillium

toatoa
Any of various plants:
Any of various plants:
Any of various plants:
Any of various plants:

tobosagrass
The perennial North American grass Pleuraphis mutica

tocalote
A plant of species Centaurea melitensis (Maltese star thistle).

tocolote
Alternative form of tocalote.

toetoe
Any of various tall grasses native to New Zealand, especially of the genus Austroderia.

toitoi
Alternative form of toetoe.

tokonoma
A recess in a domestic interior in which a hanging scroll and a flower arrangement is displayed

tokonomas
plural of tokonoma

tokopat
Palm leaf thatch.

toloatzin
Toloache (Datura inoxia)

tomatillo
A plant of the nightshade family originating in Mexico, Physalis philadelphica, cultivated for its tomato-like green to green-purple fruit surrounded by a thin papery skin.

tomatilloes
plural of tomatillo

tomatillos
plural of tomatillo

tomenta
plural of tomentum

tomentum
A mass of filamentous hairs on the leaf of a plant.
A covering of fine, soft hairs; a pubescence.
A network of fine blood vessels between the pia mater and the cerebral cortex.

tomtato
A pomato.

toona
A plant of the genus Toona; red cedar.

toonas
plural of toona

toonwood
wood of the toon tree (Toona ciliata).

topato
Synonym of pomato (“potato–tomato hybrid”).

topatoes
plural of topato

torchweed
Verbascum thapsus, the common mullein.

tornillo
A small tree of species Prosopis pubescens, native to Mexico and parts of the United States, that has spirally twisted pods.
A low-frequency seismic event associated with volcanoes.

tornillos
plural of tornillo

tororaro
Any of various plants of the genus Muehlenbeckia.

torreya
Any plant of the genus Torreya.

torreyas
plural of torreya

totora
Schoenoplectus californicus subsp. tatora, a subspecies of the giant bulrush sedge, found in South America.

tottergrass
Briza media, a species of grass.

towai
The tree Pterophylla sylvicola.

towerwort
A plant of the genus Turritis.

tracheidogram
A plot of the radial diameters of tracheids across an annual growth ring of a tree.

tracheidograms
plural of tracheidogram

tracheophyte
Any plant possessing vascular tissue (xylem and phloem), including ferns, conifers, and flowering plants.

tracheophytes
plural of tracheophyte

tramman
An elder tree.

trammans
plural of tramman

transplastome
A transplastomic genome

transplastomes
plural of transplastome

traumatropism
Curvature induced by wounds on the tip of a growing root.

treap
A type of randomized binary search tree where nodes are labelled with randomly chosen priority values and which is simultaneously a heap on those priorities

treaps
plural of treap

trebouxiophycean
Any green alga of the class Trebouxiophyceae.

trebouxiophyceans
plural of trebouxiophycean

trebouxiophyte
Any green alga of the class Trebouxiophyceae

trebouxiophytes
plural of trebouxiophyte

treebark
The bark of a tree.

treebeard
A pendulous branching lichen, Usnea barbata, resembling hair.
Spanish moss, Tillandsia usneoides.

treehouse
A house, or similar structure within a tree, or several trees, built with light materials.
A tropical residence built in a tree, or on stilts.

treehouses
plural of treehouse

treeiness
Resemblance to a tree.

treekind
All trees, considered as a group.

treelet
a small tree

treelets
plural of treelet

treeling
A young, small, or miniature tree.

treelings
plural of treeling

treelogies
plural of treelogy

treelogy
A trilogy with tangible tree-related themes.

treemoss
Unprocessed mosses and lichens found growing on trees, often used commercially in fragrances.

treeness
The essence of what it means to be a tree; the qualities that make a tree what it is.
The suitability of an evolutionary tree for representing the structure of a population; the degree to which a population structure can be accurately described as a tree of descent, with different branches evolving independently after they split.
The condition of being a tree; acyclicity and connectedness.

treeplot
A graphical representation of a tree (data structure)

treeplots
plural of treeplot

treesap
Uncommon spelling of tree sap.

treescaping
Tree-based landscaping.
The maintenance of a treescape.

treestump
The stump of a tree.

treestumps
plural of treestump

treetop
The crown or uppermost branches of a tree.

treetops
plural of treetop

tribulosis
A form of photodermatitis in sheep, caused by eating the plant Tribulus terrestris.

trichocene
Any orchid of the genus Trichocentrum.

trichocenes
plural of trichocene

trichome
A hair- or scale-like extension of the epidermis of a plant.
Hairlike structures found in some microscopic organisms and algae.
A row of cells formed by successive cell divisions.

trichomes
plural of trichome

tricotyledon
A plant whose seedling has three cotyledons

tricotyledons
plural of tricotyledon

tricyclon
Any of a group of cyclotides found in the plant Viola tricolor

triffid
A fictional plant, able to move around and kill people with a poisonous stinger
Any of the sea anemones of the genus Aiptasia with poisonous tentacles, which are a pest in aquaria.
Any large, fast-growing and hard-to-remove weed, such as the flowering shrub Chromolaena odorata.

triffids
plural of triffid

trifoliolates
plural of trifoliolate

triggerplant
Any flowering plant of the genus Stylidium.