Pseuduvaria macrophylla is a species of plant in the family Annonaceae. It is native to Peninsular Malaysia, Sumatra and Thailand. Daniel Oliver, the English botanists who first formally described the species using the synonym Mitrephora macrophylla, named it after its large leaves (Latinized forms of Greek , makros and , phullon).
It is a tree reaching in height. The young, yellow-brown to dark brown branches are densely covered in hairs. Its elliptical to egg-shaped, papery to leathery leaves are by . The leaves have pointed to wedge-shaped to blunt bases and tapering tips, with the tapering portion 5âÂÂ22 millimeters long. The leaves are hairless on their upper and lower surfaces. The leaves have 12âÂÂ22 pairs of secondary veins emanating from their midribs. Its densely hairy petioles are 2âÂÂ12 by 1âÂÂ3.5 millimeters with a broad groove on their upper side. Its Inflorescences occur alone or in pairs on branches, and are organized on indistinct peduncles. Each inflorescence has a 1âÂÂ2 flowers. Each flower is on a very densely hairy pedicel that is 3âÂÂ18 by 0.3âÂÂ1.1 millimeters. The pedicels are organized on a rachis up to 5 millimeters long that have up to 3 bracts. The pedicels have a medial, slightly hairy bract that is 0.3âÂÂ1 millimeters long. Its flowers are unisexual. Its flowers have 3 triangular sepals, that are 1âÂÂ2.5 by 1âÂÂ2.5 millimeters and partially fused at their base. The sepals are hairless on their upper surface, very densely hairy on their lower surface, and hairy at their margins. Its 6 petals are arranged in two rows of 3. The outer petals are dark red, pink-purple, or purple. The oval to elliptical, outer petals are 1.5âÂÂ4 by 2âÂÂ3.5 millimeters with hairless upper surfaces and sparsely to densely hairy lower surfaces. The inner petals are dark red or purple. The heart-shaped to triangular, inner petals have a 2âÂÂ5 millimeter long claw at their base and a 4âÂÂ11 by 2âÂÂ7 millimeter blade. The inner petals have heart-shaped to flat bases and pointed tips. The inner petals are hairless on their upper surface, except near their tips, and densely hairy on their lower surfaces. The inner petals have an elliptical, smooth, prominently raised gland on their upper surface. Male flowers have up to 55âÂÂ65 stamens that are 0.7âÂÂ1.3 by 0.4âÂÂ0.8 millimeters. Female flowers have 11âÂÂ17 carpels that are 1.2âÂÂ2.1 by 0.6âÂÂ1 millimeters. Each carpel has 2âÂÂ5 ovules arranged in two rows. The female flowers have 3âÂÂ9 sterile stamens. The fruit occur in clusters of 3âÂÂ15 on slightly hairy pedicles that are 10âÂÂ30 by 1âÂÂ2.5 millimeters. The dark brown, globe-shaped fruit are 7âÂÂ17 by 5âÂÂ15 millimeters. The fruit are smooth, and very densely hairy. Each fruit has 4âÂÂ5 hemispherical to lens-shaped seeds that are 8âÂÂ9 by 5âÂÂ7.5 by 2.5âÂÂ5 millimeters. The seeds are very wrinkly.
The pollen of P. macrophylla is shed as permanent tetrads.
It has been observed growing in well-drained sand-loam, sand-clay and red soils in lowland and submontane forests at elevations of .