Pennyroyal - Mentha pulegium

Description

Mentha pulegium produces whorls of axillary lilac-mauve flowers. Corollas are hairy on the outside, four-lobed and have four protruding stamens.  Calyx tubes have 2 lower teeth that are longer and narrower than the 3 upper teeth. The elliptic-ovate yellow-green opposite leaves are strongly channelled, have a few very small teeth. They are dotted with glands containing a strongly mint-scented oil. The stems root at the nodes and have fine, downy hairs.

Identification difficulty
Recording advice

Good photographs required and a specimen may be necessary.

Habitat

Typically found in damp grassland overlying silt or clay.

When to see it

In flower during August, September and October.

Life History

Perennial.

UK Status

Rare as a true native plant in Britain, but garden escapes and introductions cloud the true picture.

VC55 Status

Rarely recorded in Leicestershire and Rutland where most records are probably introductions.

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Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map