Mitrephora samarensis

Mitrephora samarensis is a species of plant in the family Annonaceae. It is native to the Philippines.[3] Elmer Drew Merrill, the American botanist who first formally described the species, named it after Samar, the third largest island in the Philippines, where the sample he examined was collected.

Mitrephora samarensis
Photograph of an herbarium specimen of Mitrephora samarensis.[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Magnoliids
Order: Magnoliales
Family: Annonaceae
Genus: Mitrephora
Species:
M. samarensis
Binomial name
Mitrephora samarensis

Description

It is a tree reaching 12–12 meters in height. Its leaves are 6-10 by 2-4 centimeters and come to a point at their tips. The leaves are smooth and shiny on both surfaces. Its petioles are 5 millimeters long. Its flowers are arranged in groups of 1-2 or fewer on a rachis. Each flower is on a fleshy, densely hairy pedicel 1–1.5 centimeters long. Its flowers have 3, leathery, oval-shaped sepals. Its 6 petals are arranged in two rows of 3. The outer petals are 6 by 11 millimeters. They are yellow and orange with red highlights and have wavy margins. Their outer surface is hairy, while their inner surface is smooth. The inner petals are 12 millimeters long. Its stamens are 1 millimeter long. Each flower has as many as 12 carpels that are 1 millimeter long and hairy. Each carpel has about 4 ovules.[4]

Reproductive biology

The pollen of M. samarensis is shed as permanent tetrads.[5]

References
  1. "Mitrephora samarensis Merr". Tropicos. Tropicos.org. Missouri Botanical Garden. n.d. Retrieved August 3, 2023.
  2. Energy Development Corporation; et al. (EDC) (2020). "Mitrephora samarensis". IUCN Red List of Threatened Species. 2020: e.T153919709A157177781. doi:10.2305/IUCN.UK.2020-3.RLTS.T153919709A157177781.en. Retrieved 19 November 2021.
  3. "Mitrephora samarensis Merr". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved March 26, 2019.
  4. Merrill, E.D. (1915). "Studies on Philippine Anonaceae". The Philippine Journal of Science (in English and Latin). 10 (4): 227–264.
  5. Walker, James W. (1971). "Pollen Morphology, Phytogeography, and Phylogeny of the Annonaceae". Contributions from the Gray Herbarium of Harvard University. 202 (202): 1–130. JSTOR 41764703.


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