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A perennial which grows on a stout taproot to 30 cm (1 ft.) long, it has a basal rosette of...

A bushy, hardy perennial, to 1 m (3 ft.), with bright-green, pungently aromatic, pinnately-lobed leaves and a mass of white...

A hardy perennial, up to 1 m (3 ft.) tall, it has a creeping rhizome and oval, silvery-green, soft-textured leaves,...

An evergreen tree, 20 m (65 ft.) in height, it has soft, grey bark and dark-green, ovate leaves, with a...

A spreading, mat-forming annual, the much-branched stems grow up to 40 cm (16 in) long, but most are decumbent and...

A mat-forming, hairy, hardy perennial, it has a basal rosette of wrinkled, ovate leaves with dentate margins. Flower stems rise...

A dioecious shrub, up to 2 m (6 ft.) in height, with leathery, ovate leaves, it is the only species...

A mat-forming hardy succulent, it has blue-green, rounded leaves with pointed spiny tips, arranged in rosettes. Erect, hairy stems, to...

A strong-smelling perennial on a stout, knotted rhizome, 40-80 cm (16-32 in) n height, it has ovate to lance late...

A clump-forming, hardy perennial, to 38 cm (15 in) tall, it is semi-evergreen (does not keep all its leaves in...