Pseuduvaria kingiana
| Pseuduvaria kingiana | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Magnoliids |
| Order: | Magnoliales |
| Family: | Annonaceae |
| Genus: | Pseuduvaria |
| Species: | P. kingiana
|
| Binomial name | |
| Pseuduvaria kingiana | |
Pseuduvaria kingiana is a species of plant in the family Annonaceae.[1] It is native to the Malay Peninsula.[2] Yvonne Chuan Fang Su and Richard Saunders, the botanists who first formally described the species, named it after Sir George King, the British botanist who first collected the species.[3]
Description
[edit]It is a tree reaching 9 meters in height. The young, yellow-brown to dark brown branches are densely covered in hairs. Its elliptical, slightly leathery leaves are 18–31.5 by 6-12 centimeters. The leaves have slightly wedge-shaped bases and tapering tips, with the tapering portion 5-18 millimeters long. The leaves are hairless on their upper and lower surfaces. The leaves have 14-22 pairs of secondary veins emanating from their midribs. Its very densely hairy petioles are 3-10 by 2-4 millimeters with a broad groove on their upper side. Its Inflorescences occur alone or in pairs on branches, and are organized on densely hairy peduncles that are 2.5-5 by 0.4-1 millimeters. Each inflorescence has up to 5 flower. Each flower is on a very densely hairy pedicel that is 9-20 by 0.4-0.7 millimeters. The pedicels are organized on a rachis up to 10 millimeters long that have 4-10 bracts. The pedicels have a medial, densely hairy bract that is 0.5-2 millimeters long. Its flowers are unisexual. Its flowers have 3 oval sepals, that are 0.7-1.5 by 1.2 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 dark red, oval, outer petals are 1.5-3 by 2-3 millimeters with hairless upper and sparsely hairy lower surfaces. The dark red, heart-shaped inner petals have a 1.5-4 millimeter long claw at their base and a 4.5-7 by 3-5 millimeter blade. The inner petals have slightly heart-shaped bases and pointed tips. The inner petals are sparsely hairy on their upper and lower surfaces. The inner petals have a solitary, diamond-shaped, smooth, slightly raised gland on their upper surface. Male flowers have up to 60-68 stamens that are 0.7-1.1 by 0.5-0.7 millimeters. Female flowers have 7-9 carpels that are 1.4-1.6 by 0.7-0.8 millimeters. Each carpel has 3-5 ovules arranged in two rows. The female flowers have 4-8 sterile stamens. The fruit occur in clusters of 5-7 arranged on densely to sparsely hairy peduncles that are 2-10 by 1-3 millimeters. The individual fruit are attached by densely to slightly hairy pedicles that are 15-25 by 1–2.5 millimeters. The gray-green, fruit are globe-shaped and 12-19 by 11-16 millimeters. The fruit are wrinkly, and very densely hairy. Each fruit has up to 3-5 hemispherical to lens-shaped seeds that are 11-12 by 7-10 by 5-7 millimeters, arranged in two rows. The seeds are smooth.[3]
Reproductive biology
[edit]The pollen of P. kingiana is shed as permanent tetrads.[4]
Habitat and distribution
[edit]It has been observed growing lowland forests at elevations of 60–600 meters.[3]
References
[edit]- ^ "Pseuduvaria kingiana Y. C. F. Su & R. M. K. Saunders". Catalogue of Life. Species 2000. n.d. Retrieved July 12, 2021.
- ^ "Pseuduvaria kingiana Y.C.F.Su & R.M.K.Saunders". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved July 12, 2021.
- ^ a b c Su, Yvonne C.F.; Saunders, Richard M.K. (2006). Monograph of Pseuduvaria (Annonaceae). Systematic Botany Monographs. Vol. 79. American Society of Plant Taxonomists. pp. 1–204. JSTOR 25027955.
- ^ Su, Yvonne C. F.; Saunders, Richard M. K. (2003). "Pollen structure, tetrad cohesion and pollen-connecting threads in Pseuduvaria (Annonaceae)". Botanical Journal of the Linnean Society. 143 (1): 69–78. doi:10.1046/j.1095-8339.2003.00204.x. ISSN 1095-8339.