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Vaccinium myrtillus

life science Maturity 9-11 Next article →

The bilberry, scientifically known as *Vaccinium myrtillus*, is a small deciduous shrub. It is a Holarctic species, meaning it is found throughout the northern regions of the world. This plant is famous for its edible, blue-colored fruit. It is often called the common bilberry or blue whortleberry to distinguish it from its relatives.

Llusi duon bach
Llusi duon bach

These shrubs are important because they grow in large, extensive patches. They use rhizomes, which are underground stems, to spread across the land. This allows them to form dense groups in their natural habitats.

The growth cycle of the bilberry follows a specific seasonal pattern. Between April and May, the plant produces small, hermaphrodite flowers. These flowers grow individually from the leaf axils, which are the points where leaves meet the stem. The flowers nod downward and have white-to-pink, urn-shaped petals. They possess eight to ten short stamens with horned anthers.

Vaccinium myrtillus vs Vaccinium uliginosum
Vaccinium myrtillus vs Vaccinium uliginosum

After flowering, the plant develops fruit from July to September. These berries are black-blue, flattened, and round. They have a blue-gray frosted appearance due to their outer surface. Each berry can reach a diameter of up to 1 cm.

There are several distinct physical characteristics that define this species. The branches are green, upright, and heavily branched. They have an angular or narrow winged shape and are glabrous, which means they are smooth and hairless. The leaves are light green and arranged in an alternate pattern. In the autumn, these leaves turn a deep red color before falling off. The leaves are shaped like ovals or long points, known as ovate or lanceolate. They also have prominent veins on their lower surfaces.

History and naming provide many interesting theories about this plant. The genus name *Vaccinium* may come from the Latin word for cow. This suggests the plant might have been named because cows eat the bushes. Another theory is that the name comes from a word for berry. A third idea links the name to the genus *Hyacinthus*. The species name, *myrtillus*, refers to how the leaves look like common myrtle.

Hands scooping up fresh bilberries picked in Tuntorp
Hands scooping up fresh bilberries picked in Tuntorp

Different regions use many different names for it. In Scotland, it is called a blaeberry. In Canada, people prefer the names myrtille or myrtle whortleberry.

Scientific data reveals much about the composition of the bilberry fruit. The berries are mostly water, averaging 85.4% of their weight. The dry weight of the fruit contains 31.1% carbohydrates and 2.7% lipids, which are fats. On average, a single fruit contains 25.3 seeds. These seeds are small, brown, and shaped like crescents.

Hands scooping up fresh bilberries picked in Tuntorp
Hands scooping up fresh bilberries picked in Tuntorp

The fruit typically persists on the plant for an average of 16.7 days. This rapid cycle is part of its natural life process.

The chemistry of the plant is quite complex. The fruit contains anthocyanins, which are pigments that create color. In *Vaccinium myrtillus*, these pigments are found in both the peel and the flesh. This is a key difference from the related *V. corymbosum*. The fruit also contains pectin, ursolic acid, chlorogenic acid, and ascorbic acid.

Hands scooping up fresh bilberries picked in Tuntorp
Hands scooping up fresh bilberries picked in Tuntorp

The leaves contain other substances like tannins, catechins, and arbutin. Interestingly, the plant also produces lignins as defensive chemicals. While many plants change lignin levels due to climate change, the levels in this species appear unaffected.

Bilberries have many uses and connections to human culture. For centuries, they have been used in traditional medicine. In Austria, they have been used as a tea or liqueur. In the United States, people sell bilberry dietary supplements.

Hands scooping up fresh bilberries picked in Tuntorp
Hands scooping up fresh bilberries picked in Tuntorp

The dark red juice from the fruit can stain hands, teeth, and tongues. Because of this, people in Britain traditionally used the juice as a dye for food and clothes. Today, the berries are used in many foods like pies, jams, and muffins. They are harvested in the wild in Northern Europe rather than being grown on farms.

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File:Vaccinium myrtillus vs Vaccinium uliginosum.JPG
Vaccinium myrtillus vs Vaccinium uliginosum.JPG
File:Hands scooping up fresh bilberries picked in Tuntorp.jpg
Hands scooping up fresh bilberries picked...
File:Llusi duon bach.jpg
Llusi duon bach.jpg
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