Famine Weed Parthenium hysterophorus
Parthenium weed originates from North America and belongs to the Asteraceae family. It is an annual herb that grows between 0.3m to 1.5m tall, with an erect longitudinally grooved stem and a deep tap root. The stems and leaves have short hairs, and the leaves are pale green in colour. The rosette and lower stem leaves are also pale green and are deeply pinnately lobed. The flowers are white, about 3mm across, in small compact heads and are produced from September up until May. Seeds are black.