''Pseuduvaria mindorensis'' is a species of

plant Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclud ...

in the family

Annonaceae The Annonaceae are a Family (biology), family of flowering plants consisting of trees, shrubs, or rarely lianas commonly known as the custard apple family or soursop family. With 108 accepted genera and about 2400 known species, it is the largest ...

. It is native to the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

. Yvonne Su and Richard Saunders, the botanists who first formally described the species, named it after the island of

Mindoro Mindoro is the seventh largest and eighth-most populous island in the Philippines. With a total land area of 10,571 km2 ( 4,082 sq.mi ) and has a population of 1,408,454 as of 2020 census. It is located off the southwestern coast of Luz ...

where the specimen they examined was collected in the municipality of

Puerto Galera Puerto Galera, officially the Municipality of Puerto Galera ( tgl, Bayan ng Puerto Galera), is a 1st class municipality in the province of Oriental Mindoro, Philippines. According to the 2020 census, it has a population of 41,961 people. It is ...

Description

It is a small tree reaching 3 meters in height. The young, dark brown branches are slightly hairy and have many

lenticel A lenticel is a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of dicotyledonous flowering plants. It functions as a pore, providing a ...

s. Its elliptical, papery leaves are 11-24 by 4-9 centimeters. The leaves have pointed to wedge-shaped to blunt or rounded bases and pointed to tapering tips, with the tapering portion 10-15 millimeters long. The leaves are hairless on their upper and lower surfaces. The leaves have 12-16 pairs of secondary veins emanating from their midribs. Its sparsely hairy petioles are 6-10 by 1–2.5 millimeters with a broad groove on their upper side. Its

Inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...

s occur in groups of 2–4 on branches, and are organized on densely hairy peduncles that are 3-4 by 0.8-0.9 millimeters. Each inflorescence has up to 6 flowers. Each flower is on a 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 9-14 by 0.3-0.5 millimeters. The pedicels are organized on a

rachis In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this c ...

up to 5 millimeters long that has 3-5

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, densely hairy

that is 0.9-1.2 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 1-1.5 by 1.5-2 millimeters. The sepals are hairless on their upper surface, densely hairy on their lower surface, and hairy at their margins. Its 6 petals are arranged in two rows of 3. The yellow, oval, outer petals are 2.5-3.5 by 2.5-3 millimeters with hairless upper and very densely hairy lower surfaces. The yellow, diamond-shaped, inner petals have a 3.5-4.5 millimeter long

claw A claw is a curved, pointed appendage found at the end of a toe or finger in most amniotes (mammals, reptiles, birds). Some invertebrates such as beetles and spiders have somewhat similar fine, hooked structures at the end of the leg or tarsus ...

at their base and a 6-7 by 2.5-3.5 millimeter blade. The inner petals have pointed bases and tips. The inner petals are hairless on their upper surface, except near the tip where they are hairy. The inner petals have very densely hairy lower surfaces. Male flowers have up to 22

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 0.5-0.7 by 0.5-0.7 millimeters. Female flowers have up to 9

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 0.5-1 millimeters. Each carpel has up to 5

ovule In seed plants, the ovule is the structure that gives rise to and contains the female reproductive cells. It consists of three parts: the ''integument'', forming its outer layer, the ''nucellus'' (or remnant of the megasporangium), and the fe ...

s arranged in two rows. The fruit occur in clusters of up to 4 and are organized on densely hair peduncles that are 2-4 by 1 millimeters. The fruit are attached by densely hairy pedicels that are 15 by 1 millimeters. The fruit are globe-shaped and 10 by 7 millimeters with a 0.2 millimeter-long, pointed tip. The fruit are smooth, and very densely hairy.

Reproductive biology

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

Habitat and distribution

It has been observed growing in dry habitats, in deciduous forests at low elevations.

References

{{Taxonbar, from=Q17135203 mindorensis Flora of the Philippines Plants described in 2006 Taxa named by Yvonne Chuan Fang Su Taxa named by Richard M.K. Saunders