[1] Lillering Forest and surroundings has been known as a botanically interesting locality for many years with the earliest description dating back to 1877 (Zahrtmann 1877).

A number of plants primarily exist in south-eastern Denmark, and further south, with the northern boundary being at or around Aarhus and some of these are well represented in Lillering Forest.

Others are plants such as dead-nettles, white butterbur, bitter-cress, wall barley, yellow and blue anemone and the endangered multicolored viola.

The border zone between Tåstrup Bog and Lillering Forest contains woodland geranium and mountain melick.

[2] The area contains several rare species of geometer moths associated with buckthorns that grow at the woodland edge or in Tåstrup Bog.