Species in the genus Cladrastis:

Cladrastis sikokiana / Yukunoki ユクノキ

Cladrastis sikokiana is a deciduous tree that grows in hilly districts, and its significant ones reach 20m in height. Leaves are of alternate phyllotaxis of an imparipinnate compound leaf with 4-6 pairs of, typically, alternate leaflets. The leaflets measure 4-12cm long, 2-6cm wide, long oblong, with 13-15 pairs of veins, upper surfaces with no hairs, and lower surfaces glaucous with light strands. Branch tips emerge conical inflorescences that set papilionaceous flowers 2-2.5cm long with vexillum that bend back. Bloom time: June-August.