A fleshy-rooted, short-lived, clumping perennial, reaching up to 3 ( rarely over 2 ) feet in height, that is a widespread native to rich woodlands of Eurasia ( from eastern Europe to Japan; south to northwest Africa to Turkey ). It has naturalized in eastern North America ( from southern Minnesota to Michigan's Upper Peninsula to Midland, Ontario to Ottawa, Ontario to Gaspe and Nova Scotia; south to northern Missouri to central Virginia ). It is also naturalized locally in the Pacific Northwest.
The pinnate or bipinnate leaves, up to 8 inches in length, are green.
The small yellow flowers, up to 0.6 inches wide, are borne on umbels during late spring, often persisting until late summer.
Hardy zones 3 to 9 in partial shade on just about any well drained soil. Propagation is from seed sown during spring.
* photos taken on May 2014 @ Londontown Gardens, Edgewater, MD
'Flore Pleno'
Double flowers; otherwise identical.
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