(The). The Til, a linden-tree of the Canaries, mentioned by a host of persons. Mandelolo describes it minutely, and tells us that the water which falls from this tree suffices for a plentiful supply for men and beasts of the whole island of Fierro, which contains no river. Glas assures us that “the existence of such a tree is firmly believed in the Canaries” (History of the Canary Islands). Cordeyro (Historia Insulana, book ii. chap. v.) says it is an emblem of the Trinity, and that the rain is called Agua Santa. Without doubt a rain falls from some trees (as the lime) in hot weather.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Raining Tree from Fact Monster: