What's a flush?

[TimberFrank]

Here's the context:

 

Wet woodland occurs on poorly drained and waterlogged soils, and is widespread across Northern Ireland. The habitat occurs on a range of substrates, from acid to base-rich and from peaty to mineral soils. It is found on the margins of water bodies along lowland and upland streams, on hill-side flushes and as successional habitat on fens and bogs.

[Charlieh]

its the wet boggy areas like a spring on a hillside, you will usually see them as they are covered in rushes and you probably walk round them as they can be really soft ground.

 

Upland flushes, fens and swamps are defined as peat or mineral-based terrestrial wetlands in upland situations, which receive water and nutrients from surface and/or groundwater sources as well as rainfall. The soil, which may be peaty or mineral, is waterlogged with the water table close to or above the surface for most of the year.

[TimberFrank]

Oh right, thanks.

[treedave]

Can spot flushes by change in vegetation, often Oak on the dry to Ash and alder in the wet round us. When you get your eye in they can be seen across the valley, especially when different species come into leaf at different times.