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A small evergreen tree, 2-6 m (6-19 ft.) tall, with light-green, oval leaves and thorny stems. Clusters of white flowers,...

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

A medium-sized evergreen tree, it grows to about 9 m (30 ft.) and has brown, papery bark and ovate, leathery...

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

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 deciduous, or semi-evergreen, tree growing to 40 m (130 ft.) with wide-spreading branches and palmate leaves. The flowers are...

A tall, 30-40 m (100-130 ft.) coniferous tree, with a dark-brown or grey, deeply ridged trunk and wide branches bearing...

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

A deciduous tree, growing to 15 m (50 ft.) with dark grey, furrowed bark, and Narrow, glossy, serrated-edged leaves. The...