Taproot
A central root that has smaller fibers coming off of it (See also Fibrous root).
Tendril
A twining stem that supports a vine.
Terminal
The end or tip of a part (See also Basal).
Thorn
A hard sharp modified stem; can branch and have leaves and buds (See also Spine and Bristle).
Tiller
A stiff basal or underground shoot that is mostly erect (See also Rhizome and Stolon).
Tomentose
Covered in a mat of short soft hair
Trace
The scar of the veins left behind when the leaf falls off (abscision), located within a leaf scar.
Tree
A large woody plant typically with a main trunk.
Truncate
Leaf base or apex is perpendicular to leaf petiole and relatively straight across
Trunk
The main stem of a tree.
Tufted
A clump of hairs that are arranged in a dense cluster (See also Fringed).
Twig
A branch or shoot from a shrub or tree.
Twining
A stem that spirals around another object for support.
Two-ranked
Aligned in two rows on opposite sides.
Two-scaled
Two scales on a bud.