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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  Linum sulcatum Riddell image
Photographer: Merel R. Black           

Derek Anderson

Robert W. Freckmann
Family Linaceae
Linum sulcatum Riddell
grooved yellow flax
Linum: from the old Greek name for flax, linon, used by Theophrastus
sulcatum: for "furrowed" from conspicuous ridges or grooves of the stem
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, annual, 8"-32" tall, smooth forb with upper branches
Flower: yellow, 5-parted, 1/3"-3/4" wide; inflorescence a loose, branched cluster (panicle) of stalked flowers; blooms June-July
Leaf:small and narrow, mostly alternate with dark glands at the base
Habitat: dry; upland woods, prairies, inland sands

More Information Natural Communities Herbarium Specimens
All Linum list Google- Images or Text
Cathartolinum sulcatum (Riddell) Small
Linum sulcatum Riddell var. sulcatum
Mesynium sulcatum (Riddell) A.Löve & D.Löve

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