This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Trees with alternate compound pinnate leaves and small flowers in large much-branched axillary panicles. Sepals and petals 5 or 6, the latter free, linear, contorted in aestivation. Staminal tube long; anthers within, below the summit. Fruit a fleshy drupe, 1- to 5-celled; cells 1-, rarely 2-seeded. M, Azedarach, with bipinnate leaves and lilac fragrant flowers, will live in the South-west of England if protected in Winter.
1. M. Japonica. - An ornamental tree of recent introduction. It attains a height of 20 to 40 feet in Japan. Leaves large, bipinnate; leaflets few and distant, ovate, crenate. Flowers lilac, fragrant, in large axillary panicles.