Cyril Ruoso / Woman with baby collecting Madagascar periwinkle (Catharanthus roseus) flowers and leaves, used in herbal medicine, and containing molecules which are used in the treatment of leukemia cancer. Berenty...

Paul D Stewart / Woodblock illustration of Mandrake (Mandragora) from two pages of the Ortus (Hortus) sanitatis - translated from the Latin as 'Garden of Health' by Jacob Meydenbach, 1491. He describes plants and anim...

Dong Lei / Caterpillar fungus (Ophiocordyceps sinensis) parasitizing body of caterpillar which is under the ground. Mount Namjagbarwa, Yarlung Zangbo Grand Canyon National Park, Tibet, China.

Dong Lei / Caterpillar fungus (Ophiocordyceps sinensis) held in human hand. This fungus parasitizes caterpillar under the ground and produces fruiting body above the ground. Mount Namjagbarwa, Yarlung Zangbo Gra...

Cyril Ruoso / Woman collecting Madagascar periwinkle (Catharanthus roseus) flowers and leaves, used in herbal medicine, and containing molecules which are used in the treatment of leukemia cancer. Berenty, Madagasc...

Cyril Ruoso / Woman collecting Madagascar periwinkle (Catharanthus roseus) flowers and leaves, used in herbal medicine, and containing molecules which are used in the treatment of leukemia. Berenty, Madagascar.

Ann & Steve Toon / Devil's claw (Harpagophytum procumbens) fruit, Tswalu Kalahari private game reserve, Northern Cape, South Africa, January 2012

Roland Seitre / Chinese animal medicine market, including pangolin, snake skins, ungulate horns, and other unidentified dead animals. Cengdu, Sichuan, China, 1983.

Simon Colmer / (Vernonia amygdalina) commonly called bitter leaf because of its bitter taste. In the wild, chimpanzees have been observed ingesting leaves to counter parasitic infections. Medicinal plant: used for w...

Simon Colmer / Leaves and flowers of (Brillantaisia kirungae) a medicinal plant used in Uganda to cure urethritis

Simon Colmer / (Cyphostemma nieriense) Medicinal plant: used in Uganda to cure elephantiasis

Simon Colmer / Wild finger millet (Eleusine indica) also known as Indian goosegrass, Wiregrass, Crowfootgrass, A Medicinal plant used in Uganda to cure stomach ache and chicken pox