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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  Scleranthus perennis L. subsp. perennis image
Photographer: Robert W. Freckmann           

Emmet J. Judziewicz

Merel R. Black

Merel R. Black

Robert W. Freckmann

Robert W. Freckmann
Family Caryophyllaceae
Scleranthus perennis L. subsp. perennis
perennial knawel
Scleranthus: from Greek scleros, "hard," and anthos, "flower," from the extremely hard hypanthium or calyx tube
perennis: perennial
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - locally established
Plant: spreading perennial, up to 6" tall forb; stems with many forks
Flower: greenish, tiny, 5-parted, mostly stalkless, no petals, sepals rounded with conspicuous white borders; inflorescence a tight, branched clusters; blooms June-Sept.
Leaf:opposite, growing together at the base, linear
Habitat: disturbed areas

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

Flora of North America (off site)
Scleranthus perennis L.

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