Maytenus krukovii

Maytenus krukovii is a tree species native to the Amazon rainforest; it grows in Bolivia, Colombia, Ecuador, and Peru. With a maximum recorded height of about , and leaves that span up to wide, this large tree contributes significantly to the forest canopy.
In the Quechua languages the tree is called chuchuhuasi (alternately spelled "chuchuasi") or chuchuhuasha (alternately spelled "chucchu huashu", and sometimes shortened to "chuchasha"). This name in all its permutations means "trembling back", due to the bark's effectiveness in relieving back pain, as well as the discomforts of arthritis and rheumatism. Indigenous peoples of the Amazon drink decoctions and tinctures of the bark as an herbal tonic. Extracts of the bark of "M. krukovii" are antioxidant and somewhat antimutagenic. A person can chew the bark, but it tastes very bitter.