Wildflower in moist garden, edge of water garden, understory plant in wet woods or stream edges

Fragrant flowers and crushed foliage smells like limes. Dioecious: male and female flowers are on separate plants. Hedge, buffer or screen plant where its thorns will be an asset. Foliage is aromatic.  This author has one growing as a specimen plant and loves its shape and the shiny green rather lacey foliage.