Tallus

Tallus is a term used in botany to describe the basal part of a plant stem that is above ground but below the soil surface. It is typically found in plants that grow in wet or marshy environments, such as sedges, rushes, and certain grasses. The tallus serves several functions, including providing support for the plant, storing nutrients, and facilitating the absorption of water and minerals from the soil. In some species, the tallus can also play a role in reproduction, as it may produce flowers or seeds. The length and structure of the tallus can vary greatly among different plant species, reflecting their specific ecological adaptations.