| Pseuduvaria oxycarpa | |
|---|---|
Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Magnoliids |
| Order: | Magnoliales |
| Family: | Annonaceae |
| Genus: | Pseuduvaria |
| Species: | P. oxycarpa |
| Binomial name | |
| Pseuduvaria oxycarpa | |
| Synonyms | |
Mitrephora oxycarpaBoerl. ex Koord.-Schum. | |
Pseuduvaria oxycarpa is a species ofplant in the familyAnnonaceae.[1] It is native toSulawesi.[2]Sijfert Hendrik Koorders,[3] the Dutch botanist who firstformally described the species, named it after the pointed (Latinized form of Greekoξυς, oxus) tips of its fruit (Latinized form of Greekκαρπoς, karpos).[4][5]
It is a tree reaching 13 meters in height. The young, yellow-brown to dark brown branches are slightly hairy. Its elliptical, papery leaves are 18–43.5 by 7.5-15 centimeters. The leaves have blunt bases and tapering tips, with the tapering portion 12–17 millimeters long. The leaves are hairless on their upper and lower surfaces. The leaves have 16–20 pairs of secondary veins emanating from their midribs. Its slightly hairypetioles are 9–15 by 2.5–4.5 millimeters with a broad groove on their upper side. Itsinflorescences occur in groups of 2–5 on branches, and are organized on indistinctpeduncles. Each inflorescence has 1–2 flowers. Each flower is on a very densely hairypedicel that is 14–20 by 0.6–1 millimeters. The pedicels are organized on arachis up to 5 millimeters long that have up to 6bracts. The pedicels have a medial, very densely hairybract that is 1.5–2 millimeters long. Its flowers are unisexual. Its flowers have 3 free, ovalsepals, that are 1.5–2 by 2–3 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, circular, outer petals are 5 by 4.5-5 millimeters with hairless upper and very densely hairy lower surfaces. The yellow, diamond-shaped inner petals have a 2-2.5 millimeter longclaw at their base and a 5–6 by 3–4 millimeter blade. The inner petals have pointed bases and tips. The inner petals are densely hairy upper surfaces and very densely hairy lower surfaces. Male flowers have up to 65stamens that are 0.7 by 0.5–0.6 millimeters. Female flowers have 6–9carpels that are 2 by 1 millimeters. Each carpel has 3–4ovules arranged in two rows. The fruit occur in clusters of 5–9 on slightly hairy pedicles that are 14–22 by 1.5–3.5 millimeters. The green, mature fruit are 13–22 by 7–18 millimeters. The fruit are globe shaped with an extended point. The fruit are wrinkly, and densely hairy. Each fruit has 3–4 lens-shaped seeds that are 11–13 by 7–8.5 by 5–6.5 millimeters. The seeds are wrinkly.[6]
The pollen ofP. oxycarpa is shed as permanent tetrads.[7]
It has been observed growing in clay volcanic soils in primary forests at elevations of 200–750 meters.[6]