Buddleja davidii Franch.

• an upright shrub with arching stems usually growing 1-3 m tall.
• the oppositely arranged leaves (4-20 cm long and 1-8 cm wide) are elongated in shape with finely toothed margins.
• these leaves have dark green hairless upper surfaces and greyish-green velvety hairy undersides.
• its small tubular flowers (8-14 mm long) are borne in dense clusters (12-30 cm long) at or near the tips of the branches.
• these flower are mauve or purple (occasionally white to dark purple) with orange-yellow mouths.
• its fruit is an elongated capsule (5-10 mm long) with two compartments.

[From: Environmental Weeds of Australia]