Weinmannia pinnata, commonly known as the bastard briziletto,[2] is a species of tree in the family Cunoniaceae.

[1][3] It typically grows in wet habitats at high elevations, and is one of the species found in dwarf forests perpetually wreathed in clouds.

Weinmannia pinnata is a large shrub some 2 to 4 m (7 to 13 ft) tall which sometimes grows into a small tree.

The trunk can reach 30 cm (12 in) in diameter and the bark exudes an astringent gum.

[4] Along with Prestoea montana, Brunellia comocladifolia and Podocarpus coriaceus, it is present in the wet cloud forests on the ridges and summits of the Sierra de Luquillo mountains in Puerto Rico.