Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Thalictrum dioicum L. image
Photographer: Merel R. Black           

Botanical Illustration

Damon A. Smith

Matthew L. Wagner

Merel R. Black

Christopher Noll

Christopher Noll

Christopher Noll

Robert R. Kowal

Robert R. Kowal

Janice Stiefel
Family Ranunculaceae
Thalictrum dioicum L.
early meadow-rue, quicksilver-weed
Thalictrum: from thaliktron, a name used to describe a plant with divided leaves, and a name given to the genus by Dioscorides, the Greek physician and pharmacologist who wrote the Materia Medica, which remained the leading pharmacological text for 16 centuries
dioicum: Greek for "two houses," dioecious
Hazardous hazard symbol- click for definition
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, perennial, 12"-28" tall forb
Flower: greenish to yellowish, 4-5-parted, petal-like sepals falling early, fringe-like filaments remain; inflorescence a 6" small, branched cluster; blooms April-May
Fruit:dry seed
Leaf:thin, hairless, all long-stalked, 1-4 times 3-parted, leaflets 1/3"-1 3/4" wide with 3-12 often round-toothed lobes
Habitat: partial sun to shade; dry to moderate moisture; woods, forests; in sandy, loamy soil
Notes: plants have either male (drooping) or female (erect) flowers; usually flowering at the same time or before leaves appear on deciduous trees

More Information Natural Communities Herbarium Specimens
All Thalictrum list Ethnobotany Information Google- Images or Text

Flora of North America (off site)
There are no synonyms for this taxon.

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