pennyroyal

Mentha pulegium · Accepted scientific name

Scientific literature: Very Extensive (882 studies) · ★★★★★

Pennyroyal, scientifically known as Mentha pulegium, is an aromatic perennial herb belonging to the Lamiaceae family. Renowned for its intense, pungent scent, it has historically been utilized in traditional medicine for its antimicrobial and insect-repellent properties. However, caution is essential, as its essential oils can be highly toxic.

Family
Lamiaceae
Native range
Europe
Parts used
Leaf · Stem
Common names
European Pennyroyal · Pennyroyal
Scientific synonyms
Calamintha Fenzlii · Minthe Pulegia · 80 more

Names and Synonyms

Common Names

Scientific Names

Accepted name

Mentha pulegium

Synonyms

Regional and Traditional Names

Spanish:

  • Pulegium vulgare f nummulariuoides
  • Pulegium aromaticum
  • Pulegium tomentellum f ninimum
  • Pulegium erectum
  • Poleio
  • Pulegium vulgare f hirsutum
  • Póleo
  • Mentha hirtiflora
  • Pulegium tomentellum f erianthum
  • Pulegium vulgare
  • Poleo real
  • Mentha tomentosa var. villosa
  • Te del campo
  • Micromeria fenzlii
  • Mentha subtomentella var humillima
  • Mentha subtomentella var. microphylla
  • Poleo
  • Menta poleo
  • poleo

German:

  • Polei-Minze
  • Polei
  • Poleiminze
  • Poleiminze
  • Polei-Minze
  • Flohkraut

French:

  • Menthe pouliot
  • Pennyroyal
  • Flio
  • menthe pouliot
  • menthe pouliot
  • pouliot
  • Menthe pouillot

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, falling under the class Equisetopsida and subclass Magnoliidae. Within the order Lamiales and family Lamiaceae, it is classified under the genus Mentha.

Rank Classification
Kingdom Plantae
Phylum Streptophyta
Class Equisetopsida
Subclass Magnoliidae
Order Lamiales
Family Lamiaceae
Genus Mentha

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a widespread presence across several key regions of the European continent. In Northern Europe, it can be found growing throughout Great Britain and Ireland. Its distribution continues into Middle Europe, where it is established in Austria. The species is also documented within the borders of Belgium. Finally, its geographical range extends through the territories of Czechia and Slovakia.

Region Area
Northern Europe Great Britain
Northern Europe Ireland
Middle Europe Austria
Middle Europe Belgium
Middle Europe Czechia-Slovakia
Middle Europe Germany
Middle Europe Hungary
Middle Europe Netherlands
Middle Europe Poland
Middle Europe Switzerland

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Mentha pulegium is characterized by a broad adaptability to various environments, ranging from sea level up to a maximum elevation of 2900 m AMSL. It is frequently found in anthropogenic areas (Área Antrópica), where human activities and land use influence its distribution and growth patterns. This expansive elevational range, spanning from 0 m AMSL to 2900 m AMSL, allows the species to inhabit diverse climatic zones and topographical gradients.

Elevational range max:
2900 m AMSL
Elevational range min:
0 m AMSL
Habitat :
Área Antrópica

Genetics

The genetics of Mentha pulegium are characterized by a complex and highly variable karyotypic structure, reflecting the evolutionary history of polyploidy within the Lamiaceae family. A defining feature of its genomic landscape is the significant fluctuation in chromosome numbers observed across different populations and accessions. Specifically, the chromosome number is not fixed but can manifest in various states, including 10, 20, 30, 40, 42, and 46. This wide range of chromosomal counts suggests that the species undergoes frequent polyploidization events and genome doubling, which contribute to its genetic diversity and adaptability. Such chromosomal plasticity is a hallmark of the genus Mentha, where varying ploidy levels influence the plant's morphological traits and its ability to thrive in diverse ecological niches.

Chromosome number :
10, 20, 30, 40, 42, 46

Life history

The life history of Mentha pulegium is characterized by its status as a perennial plant, allowing it to persist through multiple growing seasons. As a hemicryptophyte, its regenerative buds are located at the soil surface, protected by leaf litter or soil during unfavorable conditions. This species exhibits a deciduous nature, shedding its foliage as it transitions through its seasonal cycles.

Deciduousness :
deciduous
Life form :
hemicryptophyte
Lifecycle :
perennial

Morphology

The morphology of Mentha pulgeium is characterized by its growth form as a non-woody herb and specifically a forb. It functions as an independent organism, lacking any parasitic tendencies, and is a terrestrial species rather than an aquatic or epiphytic one. The plant is self-supporting, exhibiting an ascending shoot orientation without the need for climbing structures like lianas or vines. In terms of dimensions, the plant height typically ranges from a minimum of 0.1 m to a maximum of 0.7 m, with an average plant height of approximately 0.175 m. Furthermore, the shoot length of the specimen varies between a minimum of 15 cm and a maximum of 30 cm.

Aquatic :
terrestrial
Climber :
self-supporting
Epiphyte :
terrestrial
Growth form :
herb
Growth form :
forb
Parasite :
independent
Plant height max:
0.7 m
Plant height mean:
0.175 m
Plant height min:
0.1 m
Shoot length max:
30 cm
Shoot length min:
15 cm
Shoot orientation :
ascending
Woodiness :
non-woody

Physiology

The physiology of Mentha pulgeium is characterized by a C3 photosynthetic pathway, indicating a carbon fixation process optimized for temperate environments. The plant is non-carnivorous and does not function as a nitrogen fixer, relying instead on soil nutrient uptake. Its leaf morphology plays a critical role in its physiological efficiency, featuring an elliptic form with a mean leaf size of approximately 1.9827 cm². The dimensions of the leaves vary significantly, with lengths ranging from a minimum of 0.8 cm to a maximum of 3 cm, while the width fluctuates between 0.04 cm and 1.5 cm, maintaining a mean width of 0.7 cm. Furthermore, the plant exhibits a mean Specific Leaf Area (SLA) of 311.3 cm²/g, reflecting its leaf mass distribution and its adaptive strategy for light interception and gas exchange.

Carnivory :
non-carnivorous
Leaf form :
elliptic
Leaf length max:
3 cm
Leaf length min:
0.8 cm
Leaf size mean:
1.9827 cm²
Leaf width max:
1.5 cm
Leaf width mean:
0.7 cm
Leaf width min:
0.04 cm
Nitrogen fixer :
no
Photosynthetic pathway :
C3
Specific Leaf Area (SLA) mean:
311.3 cm²/g

Reproduction

The reproduction of Mentha puligena is characterized by a sexual process through bisexual flowers, with asexual reproduction being absent. The flowering period typically begins in August and concludes in September, producing pink-colored flowers that range in length from 0.5 cm to 0.6 cm. These flowers rely on biotic pollination, specifically utilizing insects such as bees to facilitate fertilization, as self-fertilization is noted to be absent. Following pollination, the plant develops dry, indehiscent fruits known as achenes. These fruits are quite small, with a mean length of 0.1 cm (ranging from 0.07 cm to 0.08 cm). Each fruit contains a substantial number of seeds, typically between 101 and 1000. The seeds themselves are minute, maintaining a consistent mean length, width, and volume of 0.5 mm, 0.5 mm, and 0.07 mm³ respectively. The seed mass is extremely low, with a mean of approximately 8.3567e-05 g, ranging from a minimum of 3.1e-05 g to a maximum of 1e-04 g. Dispersal of the seeds is achieved through a hydrochorous syndrome, meaning they are primarily dispersed by water.

Dehiscence :
indehiscent
Dispersal syndrome :
hydrochorous
Flower colour :
pink
Flower length max:
0.6 cm
Flower length min:
0.5 cm
Flowering time :
Aug
Flowering time :
Sep
Fruit dryness :
dry
Fruit length max:
0.08 cm
Fruit length mean:
0.1 cm
Fruit length min:
0.07 cm
Fruit type :
achene
Pollination syndrome :
insect
Pollination syndrome :
bee
Pollination syndrome :
biotic
Reproduction asexual :
absent
Reproduction sexual :
bisexual
Seed length mean:
0.5 mm
Seed mass max:
1e-04 g
Seed mass mean:
8.35666666666667e-05 g
Seed mass min:
3.1e-05 g
Seed volume max:
0.07 mm³
Seed width mean:
0.5 mm
Seeds_per_fruit :
101-1000
Self fertilization :
absent

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Mentha pulegium has 3 reported plant parts identified across 6 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include leaf, stem, flower.

Plant parts reported in Mentha pulegium
Plant part Supporting sources Consensus
Leaf 3 supporting sources ★★☆☆☆
Stem 2 supporting sources ★☆☆☆☆
Flower 1 supporting sources ★☆☆☆☆

Leaf

  1. Journal of ethnopharmacology
  2. Endocrine, metabolic & immune disorders drug targets
  3. Advanced pharmaceutical bulletin

Stem

  1. Endocrine, metabolic & immune disorders drug targets
  2. Journal of natural products

Flower

  1. Advanced pharmaceutical bulletin

Chemicals

Mentha pulegium has 179 reported phytochemicals identified across 6 scientific publications and several other databases. The most consistently reported chemicals include Pulegone, Flavonoids, CARVACROL, MENTHOL, MENTHONE.

Chemicals reported in Mentha pulegium
Chemical Supporting sources Consensus
Pulegone 9 supporting sources ★★★★☆
Flavonoids 4 supporting sources ★★☆☆☆
CARVACROL 3 supporting sources ★★☆☆☆
MENTHOL 3 supporting sources ★★☆☆☆
MENTHONE 3 supporting sources ★★☆☆☆
Piperitenone 3 supporting sources ★★☆☆☆
hesperidin 3 supporting sources ★★☆☆☆
rosmarinic acid 3 supporting sources ★★☆☆☆
1,8-Cineole 2 supporting sources ★☆☆☆☆
CARVONE 2 supporting sources ★☆☆☆☆

Pulegone

  1. Dr. Duke
  2. Molecules (Basel, Switzerland)
  3. Cellular and molecular biology (Noisy-le-Grand, France)
  4. Chemistry & biodiversity
  5. Archives of biochemistry and biophysics
View 4 additional sources
  1. International journal of microbiology
  2. Journal of the science of food and agriculture
  3. TheScientificWorldJournal
  4. Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association

Flavonoids

  1. Phytochemical analysis : PCA
  2. Endocrine, metabolic & immune disorders drug targets
  3. Molecules (Basel, Switzerland)
  4. Natural product communications

CARVACROL

  1. Dr. Duke
  2. Current molecular pharmacology
  3. Biofouling

MENTHOL

  1. Dr. Duke
  2. Cellular and molecular biology (Noisy-le-Grand, France)
  3. Endocrine, metabolic & immune disorders drug targets

MENTHONE

  1. Dr. Duke
  2. Cellular and molecular biology (Noisy-le-Grand, France)
  3. Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association

Piperitenone

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets
  3. Chemistry & biodiversity

hesperidin

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets
  3. Molecules (Basel, Switzerland)

rosmarinic acid

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets
  3. Frontiers in pharmacology

1,8-Cineole

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets

CARVONE

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets

Activities

Mentha pulegium has 517 reported activities identified across 6 scientific publications and several other databases. The most consistently reported activities include Antioxidant, Antibacterial, Cytotoxic, Anticancer, Anticonvulsant.

Activities reported in Mentha pulegium
Activity Supporting sources Consensus
Antioxidant 8 supporting sources ★★★★☆
Antibacterial 4 supporting sources ★★☆☆☆
Cytotoxic 3 supporting sources ★★☆☆☆
Anticancer 2 supporting sources ★☆☆☆☆
Anticonvulsant 2 supporting sources ★☆☆☆☆
Antidiabetic 2 supporting sources ★☆☆☆☆
Antifungal 2 supporting sources ★☆☆☆☆
Antihypertensive 2 supporting sources ★☆☆☆☆
Antimicrobial 2 supporting sources ★☆☆☆☆
Antiproliferative 2 supporting sources ★☆☆☆☆

Antioxidant

  1. Dr. Duke
  2. Molecules (Basel, Switzerland)
  3. Journal of ovarian research
  4. Endocrine, metabolic & immune disorders drug targets
  5. Scientific reports
View 3 additional sources
  1. Journal of the science of food and agriculture
  2. Natural product research
  3. Natural product communications

Antibacterial

  1. Dr. Duke
  2. Molecules (Basel, Switzerland)
  3. Scientific reports
  4. Plants (Basel, Switzerland)

Cytotoxic

  1. Dr. Duke
  2. Molecules (Basel, Switzerland)
  3. Bioorganic & medicinal chemistry

Anticancer

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets

Anticonvulsant

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets

Antidiabetic

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets

Antifungal

  1. Endocrine, metabolic & immune disorders drug targets
  2. Scientific reports

Antihypertensive

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets

Antimicrobial

  1. Endocrine, metabolic & immune disorders drug targets
  2. Frontiers in microbiology

Antiproliferative

  1. Dr. Duke
  2. Endocrine, metabolic & immune disorders drug targets

Medicinal Uses

Mentha pulegium has 17 reported medicinal uses identified across 6 scientific publications and several other databases. The most consistently reported uses include Alzheimer disease, belching, constipation, cough, fever.

Most Reported Uses

Use Sources Consensus
Alzheimer disease Chemistry & biodiversity (and other 1 sources) ★☆☆☆☆
belching Journal of ethnopharmacology (and other 1 sources) ★☆☆☆☆
constipation Endocrine, metabolic & immune disorders drug targets (and other 1 sources) ★☆☆☆☆
cough Endocrine, metabolic & immune disorders drug targets (and other 1 sources) ★☆☆☆☆
fever Endocrine, metabolic & immune disorders drug targets (and other 1 sources) ★☆☆☆☆
hiccups Endocrine, metabolic & immune disorders drug targets (and other 1 sources) ★☆☆☆☆
hypertension Endocrine, metabolic & immune disorders drug targets (and other 1 sources) ★☆☆☆☆
immune system Avicenna journal of phytomedicine (and other 1 sources) ★☆☆☆☆
immunity Animal biotechnology (and other 1 sources) ★☆☆☆☆
infertility Endocrine, metabolic & immune disorders drug targets (and other 1 sources) ★☆☆☆☆

Preparations

Preparations Sources Consensus
essential oil Anais da Academia Brasileira de Ciencias (and other 3 sources) ★★☆☆☆
essential oils Natural product communications (and other 3 sources) ★★☆☆☆
EOs Letters in applied microbiology (and other 1 sources) ★☆☆☆☆
Mentha pulegium extracts Scientific reports (and other 1 sources) ★☆☆☆☆
distillation (D) Journal of the science of food and agriculture (and other 1 sources) ★☆☆☆☆
ethanolic and aqueous extracts Frontiers in microbiology (and other 1 sources) ★☆☆☆☆
ethanolic extract Molecules (Basel, Switzerland) (and other 1 sources) ★☆☆☆☆
herbaceous distillates Communications in agricultural and applied biological sciences (and other 1 sources) ★☆☆☆☆
herbal infusions Mutation research (and other 1 sources) ★☆☆☆☆
hydro-alcoholic (HI) and aqueous (AI) infusions Journal of the science of food and agriculture (and other 1 sources) ★☆☆☆☆