Thallus vs. Mycelium — What's the Difference?

Thallus (plural: thalli), from Latinized Greek θαλλός (thallos), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms were previously known as the thallophytes, a polyphyletic group of distantly related organisms.

Mycelium is the vegetative part of a fungus or fungus-like bacterial colony, consisting of a mass of branching, thread-like hyphae. The mass of hyphae is sometimes called shiro, especially within the fairy ring fungi.

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

The vegetative part of a fungus, consisting of a mass of branching, threadlike hyphae.

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

A similar mass of fibers formed by certain bacteria.

(botany) An undifferentiated plant body, such as in algae.

The vegetative part of any fungus, consisting of a mass of branching, threadlike hyphae, often underground.

(botany) Any plant body lacking vascular tissue.

The white threads or filamentous growth from which a mushroom or fungus is developed; the so-called mushroom spawn.

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.

The vegetative part of a fungus consisting of a mass of branching threadlike hyphae

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