Acacia robusta ssp. Clavigera (Leguminosae) It is a tree that can reach up to 25 m with a crown that is flat or spreading. The bark is greyish. The flowers are white and very sweet scented. Sowing : Pour boiling water over seeds and leave to cool down and for 12 hours. Then sow immediately. Harvest : May 2010. Locality : Pietermaritzburg.