Holly

Holly, Ilex aquifolium, is a broadleaved evergreen whose glossy spined leaves and bright red winter berries made it a natural decoration for the dark of the year long before it was Christian. The Romans used holly in the midwinter festival of Saturnalia, sending boughs of it as gifts and hanging it in honour of Saturn. Its evergreen persistence through winter, when most trees are bare, is the plain observable fact behind its symbolism of life enduring through the dead season, the same logic that attaches to ivy, mistletoe and the other midwinter greens.

Holly wood has a genuine practical history distinct from its symbolic use as greenery: dense, fine-grained and among the whitest of European timbers when freshly cut, it was prized for chess pieces, inlay work and knife handles, sometimes dyed black to stand in for ebony in marquetry, a workaday craft tradition running alongside the tree's decorative and religious use at midwinter. Holly has a caffeinated relative most people never connect to it: yerba mate, Ilex paraguariensis, used to brew a caffeinated tea across South America, belongs to the same genus as European holly, Ilex aquifolium, even though the European species is toxic if eaten in any quantity and has no such use.

Christianity absorbed the midwinter holly and reread it: the prickly leaves became the crown of thorns and the red berries the drops of Christ's blood, so that a plant of Saturnalia became a plant of the Nativity and the Passion together, fixed in carols such as The Holly and the Ivy. Culpeper assigns holly to Saturn, keeping the old Roman planetary link. The modern folk figure of the Holly King, battling the Oak King for the halves of the year, is a twentieth-century construction of the neo-pagan revival rather than an attested ancient belief. The berries, it should be noted, are toxic to people though eaten by birds. The tree's meaning across all these layers is constant: green life held up in the depth of winter.

The bright berries so central to holly's midwinter symbolism serve a real ecological purpose that helped select for their eye-catching red in the first place: they are a critical food source for thrushes, waxwings and other birds through the leanest months of winter, and a holly bush stripped bare by a flock of hungry fieldfares is a genuine, commonly observed piece of winter natural history behind the plant's much older reputation as a sign of life persisting through the dead season.