Family: - FabaceaeNames:
First leaves:First leaf single, heart shaped. Tip round, Edges smooth, irregular, scalloped or toothed. Base indented, Hairy. Petiole longer than blade. Second and later leaves trifoliate.
Leaves:Three leaflets (trifoliate) with the stalk of the central leaflet longer than those of the side leaflets.
Stems:Low lying or bending upwards. Hairy.
Flower head:Clusters of flowers and burrs on a long stalk arising from the leaf axils.
Flowers:Yellow pea type.
Fruit:Coiled, burr like pod, cylindrical or flat round disk with flattened ends. 4-5 mm diameter by 4 mm tall. May have short spines.
Seeds:Light brown, kidney shaped, slightly flattened with squarish ends, 3 mm long by 1-2 mm wide. Tip round to square. Edges concave or convex. Base round to square. Surface hairless.
Roots:Taproot with nitrogen fixing nodules.
Seed Biology and Germination:Vegetative Propagules:
Origin and History:Mediterranean.
Soil:Prefers alkaline soils.
Detrimental:Weed of crops.
Toxicity:Not recorded as toxic.
Management and Control:Chlorsulfuron, metsulfuron or triasulfuron herbicides provide high levels of control in cereal crops. Clopyralid can be used in Canola.
Thresholds:More than 20 plants/m2 is usually worth controlling in cereal crops.
Eradication strategies:In bushland situations, Logran® at 40g/ha provides reasonably selective control.
Herbicide resistance:None reported. It is moderately tolerant to glyphosate.
Biological Control:Related plants:
Plants of similar appearance:Clovers (Trifolium species) usually have the central leaflet on a stalk the same length as the side leaflets.
References:Bodkin, F. (1986). Encyclopaedia Botanica. (Angus and Robertson, Australia).
Acknowledgments:Collated by HerbiGuide. Phone 08 98444064 or www.herbiguide.com.au for more information.