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 annuus L. subsp. annuus image
Photographer: Kitty Kohout           

Kurt Stüber
Family Caryophyllaceae
Scleranthus annuus L. subsp. annuus
annual knawel, German knotgrass
Scleranthus: from Greek scleros, "hard," and anthos, "flower," from the extremely hard hypanthium or calyx tube
annuus: Latin for "yearly" usually referring to a plant which lives only one season
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - naturalized
Plant: spreading annual, to 6" tall, bushy, wiry forb; stems with many forks
Flower: greenish, tiny, 5-parted, mostly stalkless, no petals, pointed sepals with thin whitish edges; inflorescence a tight, branched cluster; blooms June-Sept.
Leaf:opposite, growing together at the base, linear, pointed
Habitat: disturbed areas

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

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

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