Pseuduvaria setosa

It is a tree reaching 7 meters (23 ft) in height. The young, brown to dark brown branches are very densely hairy, but become hairless as they mature. Its elliptical to egg-shaped, papery to slightly leathery leaves are 7.5–26 centimeters. The leaves have rounded to heart-shaped bases and tapering tips, with the tapering portion 4–19 millimeters long. The leaves are sparsely to densely hairy on their upper and lower surfaces and fringed with long hairs at their margins. The midribs of the leaves are variably hairy on their upper side, and very densely covered in erect bristly hairs on their lower side. The leaves have 10–18 pairs of secondary veins emanating from their midribs. Its petioles, when present, are 5 by 0.7–3 millimeters, very densely covered in erect bristly hairs, and have a broad groove on their upper side. Its solitary Inflorescences occur on branches, and are organized on very densely hairy peduncles that are 1–3 by 0.3–0.8 millimeters. Each inflorescence has 1–2 flowers. Each flower is on a very densely hairy pedicel that is 8–24 by 0.3–0.6 millimeters. The pedicels are organized on a rachis up to 5 millimeters long that have 2–3 bracts. The pedicels have a medial, very densely hairy bract that is 0.5–1.5 millimeters long. Its flowers are unisexual. Its flowers have 3 triangular sepals that are fused at their base. The sepals are 0.8–2 by 1–2 millimeters. …

It has been observed growing on limestone granite substrates, in lowland evergreen forests at elevations of 50–400 meters (160–1,310 ft).

Bioactive compounds, including the alkaloid liriodenine, extracted from its aerial tissues have been observed in laboratory tests to have antimycobacterial activity against Mycobacterium tuberculosis, antimalarial activity against Plasmodium falciparum, and cytotoxicity to cultured human cancer cell lines.

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