Laburnum the Pacific Northwest and Northern Europe. "Laburnum" trees are ubiquitous in England, Wales, Scotland and Ireland, where they are commonly planted as lawn specimens or in shrub borders. Most garden specimens are of the hybrid between the two species, "Laburnum" ×"watereri" 'Vossii' (Voss's laburnum), which combines the longer racemes of "L. alpinum" with the denser flowers of "L. anagyroides"; it also has the benefit of low seed production. It has gained the Royal Horticultural Society's Award of Garden Merit. Laburnum Laburnum, sometimes called golden chain or golden rain, is a genus of two species of small trees in the subfamily
Genus–differentia definition Genus–differentia definition A genus–differentia definition is a type of intensional definition, and it is composed of two parts: For example, consider these two definitions: Those definitions can be expressed as one genus and two "differentiae": The process of producing new definitions by "extending" existing definitions is commonly known as differentiation (and also as derivation). The reverse process, by which just part of an existing definition is used itself as a new definition, is called abstraction; the new definition is called "an abstraction" and it is said to have been "abstracted away from" the existing definition. For instance, consider the following: