''Pseuduvaria philippinensis'' is a species of plant in the family Annonaceae. It is native to the Philippines. Elmer Drew Merrill, the botanist who first formally described the species, named it after the Philippines where the specimen he examined was collected in the Province of Quezon (then called the Province of Tayabas).

Description

It is a tree reaching 18 meters in height. The young, yellow-brown to dark brown branches are densely hairy. Its elliptical, papery to leathery leaves are 9.5-24 by 2.5-7 centimeters. The leaves have flat to pointed bases and tapering tips, with the tapering portion 5-20 millimeters long. The leaves are sparsely hairy on their upper surfaces and densely hairy on their lower surfaces. The leaves have 10-18 pairs of secondary veins emanating from their midribs. Its very densely hairy petioles are 3-11 by 1–2.5 millimeters with a broad groove on their upper side. Its Inflorescences occur in groups of 3–13 on branches, and are organized on indistinct peduncles. Each inflorescence has a solitary flower. Each flower is on a very densely hairy

pedicel Pedicle or pedicel may refer to: Human anatomy *Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures ...

that is 11-20 by 0.5-1 millimeters. The pedicels are organized on a rachis up to 5 millimeters long that have 2-3

bract In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...

s. The pedicels have a medial, very densely hairy

that is 0.5-1.5 millimeters long. Its flowers are unisexual. Its flowers have 3 free, triangular

sepals A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

, that are 0.5-2 by 1-2 millimeters. The sepals are hairless on their upper and lower surfaces, and hairy at their margins. Its 6 petals are arranged in two rows of 3. The blackish-yellow, oval, outer petals are 1-2 by 1–2.5 millimeters. The outer petals have hairless upper surfaces, except near their base, and densely hairy lower surfaces. The inner petals are blackish-yellow, and arch-shaped to inverted heart-shaped. The inner petals have a 2.5-5.5 millimeter long claw at their base and a 4.5-7.5 by 3-5 millimeter blade. The inner petals have flat bases and rounded to slightly notched tips. The inner petals are densely hairy on their upper and lower surfaces. Male flowers have up to 73

stamen The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filame ...

s that are 0.5-0.8 by 0.4-0.6 millimeters. Female flowers have about 7

carpels Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' ...

that are 1.5-1.8 by 0.6-1 millimeters. Each carpel has 2-9 ovules arranged in a row. Female flowers usually have a sterile stamen. The fruit occur in clusters of 2–6 on densely hairy pedicles that are 13-22 by 1–2.5 millimeters. The fruit are globe-shaped and 11-17 by 9-16 millimeters. The fruit are wrinkly, and very densely hairy. Each fruit has 2-9 wrinkly, hemispherical to lens-shaped seeds that are 7–8.5 by 4-4.5 by 2–3.5 millimeters.

Reproductive biology

The pollen of ''P. philippinensis'' is shed as permanent tetrads.

Habitat and distribution

It has been observed growing in damp habitats in lowland forests at elevations of up to 50 meters.

References

{{Taxonbar, from=Q17135069 philippinensis Flora of the Philippines Plants described in 1915 Taxa named by Elmer Drew Merrill