Tussock (noun)

A small, roundish clump or tuft of grass or other vegetation, often growing in marshy or wet areas.

Origin:

From the old norse word túsk, which means 'tuft, bunch'.

Examples:

1. Tussocks provide important habitat for many species of wildlife, such as birds and small mammals.
2. Tussocks can be difficult to walk on, as they are often unstable and can give way underfoot.
3. Tussocks are a characteristic feature of many types of grassland and moorland landscapes.
4. The term 'tussock' can also be used to describe a clump or tuft of hair or fur on an animal.
5. Tussocks can play a role in reducing soil erosion and improving water quality in wetland ecosystems.