weed

An aromatic perennial on a creeping rootstock, it is 50 cm (20 in) in height. Leaves are linear to ovate,...

A small, undistinguished perennial, 40 cm (16 in) high, it has a basal rosette of ovate leaves and cylindrical spikes...

A large, frost-hardy perennial, 90 cm-1.5 m (3-5 ft.) tall, with smooth, hollow, purplish stems and ovate to lance late...

A half-hardy annual with broadly ovate, deeply-veined leaves, reddish stems and small spikes of white flowers in summer. There are...

An erect, straggly biennial, 60 cm-1.2 m (2-4 ft.) high, it has ridged, branched stems with trifoliate leaves and narrow...

Purple loosestrife is a perennial which grows on a creeping rhizome with erect stems reaching 60cm-1.5 m (2-5 ft.) in...

A tall, unpleasant-smelling biennial, 1.5-2.4 m (5-8 ft.) in height, with purplish-red speckles towards the base of the stems, finely...

An annual, 60 cm—1.2 m (2-4 ft.) high, it has longer, more lance late leaves than those of C. bonus-henricus...

An annual, or more usually biennial, plant with a flower stem rising to 50 cm (20 in) from a basal...

A biennial, or short-lived perennial, which grows to 1.5 m (5 ft.) tall. It has long, ovate leaves covered in...