Lathyrus sylvestris, the flat pea or narrow-leaved everlasting-pea, is a plant species of the genus Lathyrus.

Lathyrus niger, also known as black pea, blackening flat pea and black bitter vetch, is a perennial legume that is native to Europe.

They often have a common name that alludes to the oblongate pod described in the binary name - such as 'flat pea' - or by its exhibition of a yellow, orange and pinky-red fluorescence - 'eggs and bacon' peas.

The reserve supports two uncommon legumes being narrow-leaved everlasting-pea and wild liquorice.

Lathyrus sylvestris, the flat pea or narrow-leaved everlasting-pea, is a plant species of the genus Lathyrus.

The site contains two main types of vegtation: an area of marsh, which contains a varied plant community, including Water Parsnip and Wild Celery, and an area of wasteland which is also botanically notable, with species including Narrow-leaved Everlasting-pea.