Perennial

An upright, deciduous shrub, growing to 1.5 m (5 ft.), it has arching, twiggy branches, small trifoliate leaves and is...

Adage perennial, growing to 2m (6 ft.), with long, greenly-grey, deeply cut leaves, downy on the undersides, ridged stems and...

A perennial, it has linear leaves, growing from the rounded corm. Fragrant, lilac flowers, with deeper purple veins and yellow...

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...

A hardy evergreen shrub, growing to 2 m (6 ft.), with lanceolate, sticky, dark-green leaves. The papery, saucer-shaped white flowers...

Cinchona species are tender, evergreen trees varying in height, according to species and habitat, from 10-25 m (30-80 ft.). The...

A tall, clump-forming, aromatic perennial, with a rather unpleasant smell. But it makes an attractive plant for the border with...

A perennial which grows 60 cm (2 ft.) tall and spreads indefinitely, it has fleshy, downy stems, dark-green, arrow-shaped leaves...

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

A perennial which grows on a rhizomatous rootstock. The palmate leaves develop with, or just after, the yellow-brown flowers. Fruits...