Cytisus laburnum L.
Laburnum anagyroides, the common laburnum, golden chain or golden rain, is a species in the subfamily Faboideae, and genus Laburnum. Laburnum alpinum is closely related. It is native to Central and Southern Europe.
The plant grows and flowers in damp and mild habitats, especially in the calcareous soils of Southern Europe.
The plant is a small deciduous tree or large shrub up to 7 metres (23 ft) tall. It has smooth bark, dark green spreading branches and pendulous and pubescent twigs. The leaves are generally trifoliate and oval with long petioles, smooth on the upperside and hairy on the underside.
Laburnum anagyroides blooms in late spring with pea-like, yellow flowers densely packed in pendulous racemes 10-25 cm (4-10 in) long. The flowers are golden yellow, sweet scented, and typically bloom in May.
The seeds are legumes with large numbers of black seeds that contain cytisine, an alkaloid extremely poisonous to humans as well as goats and horses, especially when not ripe. However, some wild animals such as hares and deer can feed on them without any problems, and because of this the plant is believed to have magic properties in some regions.
All parts of the plant contain cytisine and are poisonous if consumed.
The wood is hard and heavy, of a yellow/brown colour, ideal for making posts, for woodturning and as fuel. In the past (and today on historic re-enactments) it was used for making bows.
The tree is also known as false ebony since the wood from very old specimens could be used in place of ebony.
The English poet Francis Thompson described the laburnum in one of his poems:
Mark yonder, how the long laburnum drips
Its jocund spilth of fire, its honey of wild flame!—Francis Thompson, Sister Songs (1895)
The writer J. R. R. Tolkien was inspired by the laburnum for his creation of Laurelin, one of the two mythological trees in The Silmarillion, and Tolkien's description of it is strongly influenced by Thompson's verses.
- Kilbracken, J. 1995. Easy way guide Trees. Larousse. ISBN 0-7523-0027-X
- Tolkien, J. R. R.. "The later Quenta Silmarillion". In Christopher Tolkien. Morgoth's Ring. Fulham: HarperCollinsPublishers. p. 157. ISBN 0-261-10300-8.
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