Stipe

The stalk of an organ.

Stipitate

Provided with a stipe.

Stipules

Appendages to the base of a petiole, often adnate to it.

Stipulate

With stipules.

Stolon

A basal branch rooting at the nodes.

Stoloniferous

Producing or bearing stolons.

Stoma (Stomata)

The transpiring orifices in the epidermis of plants.

Strict

Straight and erect.

Strigose

With appressed or ascending stiff hairs.

Strophiole

An appendage to a seed at the hilum.

Strophiolate

With a strophiole.

Style

The narrowed top of the ovary.

Stylopodium

The expanded base of a style.

Subacute

Somewhat acute.

Subcordate

Somewhat heart-shaped.

Suhcoriaceous

Approaching leathery in texture.

Subfalcate

Somewhat scythe-shaped.

Subligneous

Somewhat woody in texture.

Subtcrcte

Nearly terete.

Subulate

Awl-shaped.

Subversatile

Partly or imperfectly versatile.

Succulent

Soft and juicy.

Sulcate

Grooved longitudinally.

Superior

Applied to the ovary when free from the calyx; or to a calyx adnate to an ovary.

Suture

A line of splitting or opening.

Symmetrical

Applied to a flower with its parts of equal numbers.

Syncarp

A fleshy multiple or aggregate fruit.

Tendril

A slender coiling organ.

Terete

Circular in cross section.

Ternate

Divided into three segments, or arranged in threes.

Tetradynamous

With~TouT long stamens and two shorter ones.

Thallus

A usually flat vegetative organ without differentiation into stem and leaves.

Thyrsoid

Like a thyrsus.

Thyrsus

A compact panicle.

Tomentose

Covered with tomentum.

Tomentulose

Diminutive of tomentose.

Tomentum

Dense matted wool-like hairs.

Torsion

Twisting of an organ.

Tortuous

Twisted or bent.

Tracheae

The canals or ducts in woody tissue.

Tracheids

Wood-cells.

Triandrous

With three stamens.

Tricarpous

Composed of three carpels.

Trimorphous

Flowers with stamens of three different lengths or kinds; in three forms.

Triquetrous

Three-sided, the sides channeled.

Truncate

Terminated by a nearly straight edge or surface.

Tuber

A thick short underground branch or part of a branch.

Tubercle

The persistent base of the style in some Cyperaceae; a small tuber.

Tuberculate

With rounded projections.

Turbinate

Top-shaped.

Uliginous

Inhabiting mud.

Umbel

A determinate, usually convex flower-cluster, with all the pedicels arising from the same point.

Umbellate

Borne in umbels; resembling an umbel.

Umbellet

A secondary umbel.

Umbelloid

Similar to an umbel.

Uncinate

Hooked, or in form like a hook.

Undulate

With wavy margins.

Urceolate

Urn-shaped.

Utricle

A bladder-like organ; a one-seeded fruit with a loose pericarp.

Valvate

Meeting by the margins in the bud, not overlapping; dehiscent by valves.

Vascular

Relating to ducts or vessels.

Vein

One of the branches of the woody portion of leaves or other organs.

Veinlet

A branch of a vein.

Velum

A fold of the inner side of the leaf-base in Isoetes.

Velutinous

Velvety; with dense fine pubescence.

Venation

The arrangement of veins.

Vernation

The arrangement of leaves in the bud.

Versatile

An anther attached at or near its middle to the filament.

Verticillate

With three or more leaves or branches at a node; whorled.

Vestigial

In the nature of a vestige or remnant.

Villous

With long soft hairs, not matted together.

Whorl

A group of three similar organs or more, radiating from a node. Verticil.

Whorled

See Verticillate.

Winged

With a thin expansion or expansions.