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Family Euphorbiaceae

HAWAII - CULTIVATED

Euphorbia tirucalli

Makapu'u Lighthouse, Oahu

PENCIL TREE or MILK BUSH

Ornamental tree with tiny leaves.  Milky latex may be used to create biofuel.  In cultivation for many centuries, the true origin is uncertain.  Occurs throughout Africa & Asia.

http://www.hort.purdue.edu/newcrop/duke_energy/euphorbia_tirucalli.html