Ilex guayusa ( or ) is a species of tree of the holly genus, native to the Amazon Rainforest. One of three known caffeinated holly trees, the leaves of the guayusa tree are dried and brewed like a tea for their stimulative effects.
Ilex guayusa is an evergreen dioecious tree which grows 6–30 m (20–98 ft) tall. The leaves are ovate, elliptic, oblong or lanceolate; 7–22 cm (2.8–8.7 in) long, 2.5–7 cm (0.98–2.76 in) wide; with serrate or dentate margin. The flowers are small and white, arranged in thyrses. ...
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