Neil Lucas / Dragons blood tree (Dracena cinnibaris) reflected, Socotra, Yemen, February 2007. Digitally created image

Neil Lucas / Sun shining through the branches of a Dragons blood tree (Dracena cinnibaris) in mountainous desert, Socotra, Yemen, February 2007

Neil Lucas / Dragons blood trees (Dracena cinnibaris) and Desert rose (Adenium obesum socotranum) in Momi Valley, Socotra Island, Yemen, February 2008

Sylvain Cordier / Children who have climbed to the top of a Dragon tree (Dracaena Cinnabari) Socotra Island UNESCO World Heritage Site, Yemen.

Sylvain Cordier / Dragon's blood tree (Dracaena cinnabari) Socotra Island UNESCO World Heritage Site, Yemen.

Sylvain Cordier / Dragon's blood tree (Dracaena cinnabari) Socotra Island, UNESCO World Heritage Site, Yemen.

Sylvain Cordier / Dragon's blood tree (Dracaena cinnabari) Homhil plateau, Socotra Island, UNESCO World Heritage Site, Yemen.

Mark Moffett / Dragon-blood Tree (Dracaena cinnabari) forest, Socotra, Yemen

Mark Moffett / Dragon-blood Tree (Dracaena cinnabari) forest and bedouin hut, Firmihin, Socotra, Yemen

Simon Colmer / Steudner's Dragon tree (Dracaena steudneri) Medicinal plant used as an anti-bacterial, anti-viral and combats high blood pressure

Hanne & Jens Eriksen / Dragon's blood tree (Dracaena serrulata) at high elevation in Dhofar Mountains, Oman, January

Neil Lucas / Two Dragons blood trees (Dracena cinnibaris) Momi Valley, Mountains, Socotra, Yemen, June 2007