Gum Cistus – the taste of the Douro

Sometimes, a smell or taste strikes us and we are transported to a specific place and moment in time. Wine, for example, has the ability to express a sense of place, which has been captured in the bottle and is then released in your glass.

This notion that wine reflects the essence of its origin, its Terroir, is not limited to only the soil or aspect of any given vineyard but also encompasses the native flora and fauna of the region. Vineyards are an integrated part of their native ecosystem, not as disconnected from it. Every aspect of the environment in which the vines grow contributes the final quality of the wine.

In the Douro Valley, we have a great example of this: the wild aromatic plant known variously as Esteva, Rockrose, or Gum Cistus. Gum Cistus, which grows in low banks of scrub, imparts its refreshing peppermint and eucalyptus flavours to the grapes in the neighbouring vineyards. As a result, Graham’s Ports gain the ability to inspire those olfactory ‘madeleine moments’ that recall the magic and the atmosphere of the Douro.

The 'Gum Cistus', 'Esteva', or 'Rock-rose' of the Douro Valley

The leaves of the Gum Cistus are coated with a natural resin, which protects the plant from the summer sun and bush-fires. In the heat, this resin vapourises and fills the air around the vineyards with a perfume that none who have visited the Douro in summer will easily forget.

The skins of the grapes similarly have a waxy coating, which captures aromas and particles from the atmosphere around the vineyards. These flavours are then imparted to the wine when the grapes are fermented with their skins (as they are when making Port or red wine).

Grapes from the Douro Superior, the eastern-most of the Douro’s three subregions, have a particularly pronounced ability to capture some of the characteristics of the Gum Cistus. There is also a noticeable difference across grape varieties. The Touriga Nacional, one of Portugal’s most famous varieties, expresses the essence of its native Douro terroir more than any other grape does.

This is perhaps the greatest power that wine has over us: to express the unique character of a magical place. It reminds us that wine is intimately connected to the soil and environment in which it is produced and that its taste is closely interwoven with its provenance.

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