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A vigorous hardy perennial, growing to 1 m (3 ft.) in height. It has branched stems, lance late, finely toothed...

A tall annual or biennial, up to 1.2 m (4 ft.) in height, it has large, deeply lobed, spiny leaves...

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

A spreading, fast-growing deciduous tree, up to 25 m (82 ft.), it has greyish, fissured bark, arching branches and silvery-green,...

A large hardy perennial, to 2 m (6 fat), on a thick rhizome, with a basal clump of palmate lobed...

A hardy perennial, growing to 30 cm (12 in), it has hairy stems and dark green leaves, blotched with creamy-white...

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

A low-growing perennial, to 15 cm (6 in), with a rosette of deeply veined, softly hairy, broad ovate leaves and...

A perennial on a short rhizome with dense fibrous roots and a rosette of broadly ovate, rough-textured leaves. Flower stems...

A hardy perennial with a stout, twisted rhizome, it has a clump of broad, ovate basal leaves, from which the...