Delaware Wildflowers • Common names
Lesser Celandine
Ficaria vernaRanunculaceae — Buttercup family
Invasive non-native

When I first saw this plant, in 1998, it was relatively uncommon. I had trouble finding a name for it; it wasn't listed in my field guides.
Prices CornerApril 2001

Now it is among the worst of the invasive plants in Delaware.
White Clay Creek State Park -- Pump House RoadApril 2012

This plant covers acres along streams in Delaware, including the Brandywine Creek floodplain. Note the Virginia bluebells in the foreground. It's ideal habitat for both plants, but the bluebells can't compete.
Brandywine Creek State ParkApril 2004

The leaves emerge in late winter and form a dense mat.

A single plant.

The plant spreads by growing new plants from tubers...
Middle Run Valley Natural AreaMarch 2016

...and from bulblets that grow in the leaf axils.

The leaves die in late spring, leaving the bulblets free to be washed downstream or spread in mud on shoes and bike tires.
White Clay Creek State Park -- Creek RoadMay 2016
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Photos copyright David G. Smith
Information from the Delaware Flora Checklist used with author's permission.