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.
Flowers hermaphrodite. Stamens inserted at the base of the outside of the disk. Leaves stipulate, opposite, pinnate, or 3- to 5-foliolate.
 
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