Easton's Bible Dictionary (1897)
Heb. libneh, “white”, (Gen. 30:37; Hos. 4:13), in all probability the storax tree (Styrax officinalis) or white poplar, distinguished by its white blossoms and pale leaves. It is common in the Anti-Libanus. Other species of the poplar are found in Palestine, such as the white poplar (P. alba) of our own country, the black poplar (P. nigra), and the aspen (P. tremula).
Smith's Bible Dictionary (1863)
). Both poplars and storax or styrax trees are common in Palestine, and either would suit the passages where the Hebrew term occurs. Storax is mentioned in Ecclus. 24:15, together with other aromatic substances. The Styrax officinale is a shrub from nine to twelve feet high, with ovate leaves, which are white underneath; the flowers are in racemes, and are white or cream-colored.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
POP'LAR (white). The storax (see Stacte), being ordinarily only a bush, does not meet the conditions of Hos 4:13. V. Gen 30:37.