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Redcurrant

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The redcurrant, scientifically known as Ribes rubrum, is a deciduous shrub native to western Europe. This means it is a plant that loses its leaves every year. It belongs to the genus Ribes and the family Grossulariaceae. Redcurrants are widely cultivated by people for their edible fruit. They have also escaped into the wild in many different regions. These plants are important both as food sources and as ornamental garden plants.

The growth of a redcurrant bush follows a specific biological process. The plant features five-lobed leaves that grow in a spiral pattern along the stems. Small, yellow-green flowers appear in hanging groups called pendulous racemes. These flowers are somewhat inconspicuous, meaning they do not stand out much. The plant is capable of self-pollination to produce fruit. However, it produces a higher amount of fruit when pollinated by a different variety of plant. As the flowers mature, they transform into bright red, translucent berries.

There are several distinct types and relatives of the redcurrant. While Ribes rubrum is the primary species, other similar species exist in different regions. For example, R. spicatum is found in northern Europe and northern Asia. R. alpinum grows in northern Europe and at high altitudes in places like the Alps and the Pyrenees. In North America, the species R. triste grows from Newfoundland to Alaska. There is also a specific cultivar called the white currant. The white currant is not a separate species, but a sweeter and less pigmented variant of Ribes rubrum.

Human history with the redcurrant includes significant agricultural developments. While the plant is native to Europe, large-berried cultivars were first produced in Belgium and northern France during the 17th century. Over time, many modern cultivars have been selected for domestic use. Some of these have even escaped gardens to grow in the wild across Europe and Asia. Certain varieties have even earned the Royal Horticultural Society's Award of Garden Merit. These notable cultivars include 'Red Lake', 'Stanza', 'Jonkheer van Tets', and the white variety 'White Grape'.

The chemical makeup of the fruit determines its unique sensory profile. Redcurrants are known for a tart flavor caused by organic acids and mixed polyphenols. There are as many as 65 different phenolic compounds that contribute to its astringent properties. These levels actually increase during the final month of the ripening process. Scientists have isolated twenty-five individual polyphenols and other nitrogen-containing phytochemicals in the juice. These specific compounds are responsible for the astringent taste sensed by the human tongue.

Redcurrants are also highly nutritious. The raw fruit is composed of 84% water and 14% carbohydrates. It contains 1% protein and has negligible amounts of fat. In a reference amount of 100 grams, redcurrants provide 46% of the Daily Value (DV) for vitamin C. This makes them a rich source of that specific micronutrient.

Culinary uses for the redcurrant vary greatly across different cultures. In the United Kingdom, redcurrant jelly is a common condiment for meats like lamb, turkey, or goose. This jelly is made by boiling the berries with sugar and then straining them. In France, a traditional spread called Lorraine jelly is made from white or red currants. Historically, monks would use a goose feather to remove the pips by hand before cooking. In Germany, a syrup made from the berries is mixed with soda water to make a drink called Johannisbeerschorle. This name relates to St. John's Day on June 24, when the berries are said to ripen.

Beyond drinks and jams, the redcurrant is used in many desserts. In Austria, it is a common filling for the Linzer torte. In Russia, the berries are used to make a sweet dessert called kissel. In Scandinavia, they are often found in fruit soups and summer puddings. Even the leaves of the plant have uses, as they can be made into an infusion with black tea. This shows how many different parts of the Ribes plant can be utilized by people.

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