In the Symphyogyna thallus there is a slightly thickened central axis, with thin wings growing off from either side of that axis. As you can see from the Symphyogyna photograph above, a thallus can fork and each fork will have its own thickened, central axis. That basic structure is common in many of the simple thallose liverworts. At maturity, the spores are violently expelled from the ascus then germinate on the substrate forming mycelial filaments. For a lichen to recover, the mycelium thus formed must meet a single algae. A new thallus can therefore be rebuilt and give back an adult thallus. The symbiosis then gradually recovers.
General structure The main plant body is gametophyte. The adult plant consists of two parts: rhizome and upright leafy shoot. 1. The adult lichen consists only of a vertical fruticose thallus (Fig. 69). The twofold thallus has been independently developed in several lichen families and can be of different origin. In Cladonia the thallus verticalis is formed from the generative tissue, a tissue which surrounds the sexual organs and usually gives rise to the ascocarp.
Thallus, plant body of algae, fungi, and other lower organisms formerly assigned to the obsolete group Thallophyta. A thallus is composed of filaments or plates of cells and ranges in size from a unicellular structure to a complex treelike form. Overview Information Bladderwrack is a type of seaweed. People use the whole plant to make medicine. Bladderwrack is used for many conditions, but, so .