Common Name: knawel
Species: Scleranthus annuus L.
Bayer Code: SCRAN

Knawel is a winter annual which, when it first germinates, may go unnoticed because of its grasslike features. It closely resembles parsley-piert and lawn burrweed. It is a freely branched plant with spreading stems. Leaves, clasping the stem, are opposite, linear, less than 1 mm wide, and sharp-pointed. The very inconspicuous flowers are clustered in the leaf axils. They are small, green, lacking petals, and somewhat spiny to the touch.
knawel
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knawel
knawel in turf
knawel (L) parsley-piert (R)
knawel
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CharacteristicTypeDescription
Growth Season winter annual weed 
Growth Habit prostrate, spreadingcan form low mats or clumps in established turfgrass
Leaflet Number four or more 
Leaf Margin smooth 
Leaf Hairs none 
Leaf/Leaflet Shape linear/oblong 
Leaf Width <1/2 inch 
Leaf Venation parallel 
Leaf Arrangement opposite 
Root Type fibrous OR taproot 
Flower Color  very inconspicuous green flowers