The shape of a lichen is usually determined by the organization of the fungal filaments. [36] The nonreproductive tissues, or vegetative body parts, are called the thallus. Lichens are grouped by …

Oct 31, 2025 · Lichen, any of about 15,000 species of plantlike organisms that consist of a symbiotic association of algae (usually green) or cyanobacteria and fungi. They are found worldwide and occur …

Feb 11, 2023 · A lichen is a symbiotic partnership between fungi and either algae or cyanobacteria. While you may not notice lichens in the world around you, they make up a significant part of the …

The dominant partner is the fungus, which gives the lichen the majority of its characteristics, from its thallus shape to its fruiting bodies. The alga can be either a green alga or a blue-green alga, …

Jul 18, 2025 · If you’re curious about what lichen is, how it grows, and why it matters, this comprehensive beginner’s guide will walk you through everything you need to know.

A lichen is not a single organism; it is a stable symbiotic association between a fungus and algae and/or cyanobacteria. Like all fungi, lichen fungi require carbon as a food source; this is provided by their …

Dec 1, 2025 · Discover the fascinating world of lichens: unique partnerships between fungi and algae found everywhere. Learn what makes them special.

May 22, 2025 · The internal structure of Usnea, fruticose lichen, is slightly different due to its cylindrical cross-section. The layers from outside to inside include the cortex, medulla (composed of algal cells …

Dec 5, 2025 · Lichen Lichens are unlike any other organism on earth. Their structure is unique: a symbiosis of two organisms — a fungus and algae. Lichens are not plants, so they do not produce …

Apr 16, 2025 · The red caps on this lichen give it the common name “British soldiers.” Photo by Bert Cregg, MSU. One of the most important things to know about lichens is that they are harmless to …