Pseuduvaria taipingensis
| Pseuduvaria taipingensis | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Magnoliids |
| Order: | Magnoliales |
| Family: | Annonaceae |
| Genus: | Pseuduvaria |
| Species: | P. taipingensis
|
| Binomial name | |
| Pseuduvaria taipingensis | |
Pseuduvaria taipingensis is a species of plant in the family Annonaceae.[2] It is a tree endemic to Peninsular Malaysia.[3] James Sinclair, the Scottish botanist who first formally described the species, named it after Taiping a city in Perak, Malaysia where the specimen he examined was collected.[4]
Description
[edit]It is a small tree. The young, yellow to brown branches are densely hairy, but become hairless with maturity. Its egg-shaped to elliptical, slightly leathery leaves are 16.5-30 by 6-11.5 centimeters. The leaves have heart-shaped to rounded bases and tapering tips, with the tapering portion 14-23 millimeters long. The leaves are hairless. The leaves have 14-18 pairs of secondary veins emanating from their midribs. Its densely hairy petioles are 5 by 1.5-4 millimeters with a broad groove on their upper side. Its solitary Inflorescences occur on branches, and are organized on very densely hairy peduncles that are 1.5 by 1 millimeters. Each inflorescence has up to 1-2 flowers. Each flower is on a very densely hairy pedicel that is 18-20 by 0.5 millimeters. The pedicels are organized on a rachis up to 5 millimeters long that have 2 bracts. The pedicels have a medial, very densely hairy bract that is up to 1 millimeter long. Its flowers are unisexual. Its flowers have 3 free, triangular sepals, that are 1.5 by 1.5 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, egg-shaped, outer petals are 2.5 by 2.5 millimeters with hairless upper and very densely hairy lower surfaces. The yellow, heart-shaped inner petals have a 4.5 millimeter long claw at their base and a 7.5 by 4.5 millimeter blade. The inner petals have heart-shaped bases and pointed tips. The inner petals are sparsely hairy on their upper surfaces and densely hairy on lower surfaces. The inner surface of the inner petals has a solitary, smooth, slightly raised, irregularly shaped gland. The male flowers have up to 40 stamens that are 0.5-0.8 by 0.5-0.8 millimeters. The solitary fruit are organized on sparsely hairy peduncles that are 5 by 1 millimeters. The fruit are attached by sparseliy hairy pedicles that are 18-26 by 1-1.5 millimeters. The yellow to brown-purple, globe-shaped fruit are 15-20 by 14-18 millimeters. The fruit are smooth, and densely hairy. Each fruit has up to 2-4 hemispherical to lens-shaped, wrinkly seeds that are 10 by 10 by 5 millimeters. Each seed has a 0.5-0.8 by 0.3-0.5 millimeter elliptical hilum. The seeds are arranged in two rows in the fruit.[5]
Reproductive biology
[edit]The pollen of P. taipingensis is shed as permanent tetrads.[6]
Habitat and distribution
[edit]It has been observed growing in dense forests below mountains at elevations up to 1400 meters.[5]
References
[edit]- ^ Verspagen, N.; Erkens, R.H.J.; Daniels, A. (2021). "Pseuduvaria taipingensis". IUCN Red List of Threatened Species. 2021: e.T31724A180646401. doi:10.2305/IUCN.UK.2021-2.RLTS.T31724A180646401.en. Retrieved 17 November 2021.
- ^ " Pseuduvaria taipingensis J. Sinclair". Catalogue of Life. Species 2000: Leiden, the Netherlands. Retrieved 5 March 2022.
- ^ "Pseuduvaria taipingensis J.Sinclair". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved March 5, 2022.
- ^ Sinclair, James (1955). "A Revision of the Malayan Annonaceae". The Garden's Bulletin, Singapore. 4. 14: 149–516.
- ^ a b 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.
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