Mentha suaveolens

Morphological description

Perennial herbaceous plant, Apple Mint is characterized by an erect or ascending habit, sometimes stoloniferous, which can reach a height of up to 90 cm. The stem is quadrangular, branched, and has a variably hairy surface, with simple and branched hairs, giving it a velvety texture. The base of the stem tends to become woody with age.

The leaves are generally sessile, arranged oppositely along the stem, ovate, oblong, or subrounded in shape, with sizes approximately ranging between 2-4 cm in width and 3-4.5 cm in length. The upper surface is intense gray-green, rough, and covered with appressed hairs, while the underside is tomentose, with a dense cottony hairiness composed of simple and branched white hairs. The leaf margin is dentate or crenate-dentate, while the apex is rounded. The blade shows prominent veins and a herbaceous texture.

The flowers, hermaphroditic and fragrant, are gathered in terminal spike inflorescences (contiguous verticillasters) ranging from 3 to 9 cm in length and fusiform in shape, with a pointed apex. The inflorescences are very dense and formed by verticillasters of small flowers borne on very short peduncles (about 1 mm), with lanceolate bracteoles of 3-5 mm, ciliolate and persistent. The calyx, 1-2 mm long, is gamosepalous, conical, and tomentose, gray in color with triangular-lanceolate teeth. The corolla, 3-4 mm long, can be whitish or pale pink, with four subequal lobes and protruding stamens. The stigma is bifid.

The fruit is a microbasal schizocarp formed by four monospermous achenes, typical of Lamiaceae, although rarely observed in detail. The roots are rhizomatous and the plant tends to spread also through stolons.

The species is evergreen and presents a characteristic odor, described as acrid and intense, due to the presence of aromatic essential oils.

Habitat and distribution

Apple Mint is a eurymediterranean species with a distribution mainly affecting the coasts and Mediterranean regions of Italy, extending also northwards and into some areas of Central and Eastern Europe. In Italy, it is quite widespread especially in southern regions and along the coasts, but it is also found in inland areas up to 600 m altitude, with reports reaching up to 1500 m in southern zones.

It prefers humid habitats such as uncultivated lands, wet meadows, paths, ditches, and riverbanks. It favors fresh and well-drained soils, with exposure from partially shaded to sunny. It is often present in anthropized environments and can behave as a weed due to its easy rhizomatous and stoloniferous growth.

The species adapts well to different soil types but shows preference for those rich in organic matter and with good moisture content.

Flowering period

Apple Mint flowers between May and October, with flowering duration and intensity varying depending on the region and local climatic conditions. In warmer and more humid Mediterranean areas, flowering tends to be more prolonged, while in cooler and mountainous areas it may be more concentrated in the summer months.

Ecology and pollination

The species presents a reproductive strategy based on the production of hermaphroditic flowers, which facilitate self-pollination but are mainly pollinated by pollinating insects. Among the main pollinators are bees, bumblebees, and butterflies, attracted by the aromatic scent and nectar produced by the flowers. The arrangement of flowers in dense terminal spikes facilitates insect attraction and visitation.

Seed dispersal occurs through the small achenes produced, although the species also spreads effectively vegetatively via stolons and rhizomes. This allows it to rapidly colonize new environments, often becoming a weed in cultivated soils or gardens.

Curiosities and traditional uses

Apple Mint has been known since antiquity for its aromatic and medicinal properties. Its English name “apple mint” alludes to the sweet scent, although its odor is actually more acrid and intense compared to other mints.

Traditionally it has been used as a medicinal plant for its antiseptic, digestive, carminative, analgesic, and antifermentative properties. The menthol contained in the essential oils makes it useful for treating oral inflammations, promoting digestion, and soothing coughs. In folk medicine, it has also been used to prevent cataracts, promote sleep, relieve renal and biliary colic, combat halitosis, and even stimulate sexual desire.

In popular culture, it was believed that its scent kept rodents away, so in the past it was scattered in granaries for this purpose. Even today, beyond medicinal use, the plant is employed in cooking to flavor liqueurs, sweets, and some cosmetic preparations.

However, it is important to remember that medicinal and food uses should always be carefully evaluated and supervised by specialists.

Etymology

The genus name derives from the nymph Minthê of Greek mythology, loved by Hades and transformed into a plant by Proserpina out of jealousy. The specific name “suaveolens” means “sweet-smelling,” a somewhat ironic appellation given that the species’ odor is actually quite acrid and intense.

The Italian common name “menta a foglie rotonde” refers to the characteristic shape of the leaves, rounder compared to other Mentha species, which often have more lanceolate or elongated leaves.

Sources

• Prof. S. Pignatti, Flora d'Italia
• Acta Plantarum - Flora delle regioni italiane (scheda di Giuliano Salvai)
• Tela Botanica / H. Coste, Flore descriptive et illustrée de la France
• World Flora Online (WFO)