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.
Herbs or undershrubs. Leaves pinnately divided; leaflets
3 or more, entire. Flowers capitate or umbellate. Upper stamen free, or not; alternate filaments often dilated.
 
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