thallus

A plant body undifferentiated into stem, root, or leaf.

The main body of an alga, fungus, or lichen.

In botany, a vegetative body or plant-body undifferentiated into root, stem, or leaves; the plant-body characteristic of the Thallophyta. Also thalamus. See cut under applanate.

A solid mass of cellular tissue, consisting of one or more layers, usually in the form of a flat stratum or expansion, but sometimes erect or pendulous, and elongated and branching, and forming the substance of the thallogens.

An undifferentiated plant body, such as in algae.

Any plant body lacking vascular tissue.

a plant body without true stems or roots or leaves or vascular system; characteristic of the thallophytes