Mitrephora winitii

Mitrephora winitii
	Mitrephora winitii
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Magnoliids
Order:	Magnoliales
Family:	Annonaceae
Genus:	Mitrephora
Species:	M. winitii
Binomial name
	Mitrephora winitii; Craib

Mitrephora winitii is a species of plant in the family Annonaceae. It is native to Thailand.[1] William Grant Craib, the British botanist who first formally described the species, named it after Phya Winit Wanandor, the Thai botanist who collected the specimen that Robinson examined.[2] In the Prachuap Khiri Khan province of Thailand it is commonly referred to as Mahaphrom.

Description

It is a tree. Its slightly leathery leaves are 5-11 by 3.5-4.7 centimeters with blunt tips. The leaves are smooth on their upper surfaces while their undersides lighter in color and hairy. Its petioles are 4-5 millimeters long. Each flower is on a hairy pedicel 1 centimeter long. Its flowers have 3 sepals that are 1 centimeter long with velvety hair on their outer surface sparse hair on their inner surface. Its 6 petals are arranged in two rows of 3. The white outer petals are 4 by 2 centimeters, hairy on their outer surface and sparsely hairy inside. The purple inner petals have a 1.5 centimeter claw and are hairy. Its stamens are 2 millimeters long.[3]

Reproductive biology

The pollen of M. winitii is shed as permanent tetrads.[4]

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References

"Mitrephora winitii Craib". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved April 3, 2019.
Suvarnasuddhi, Khid; Smitinand, Tem (1955). "Descriptions of Plants Named in Honour of Phya Winit Wanandorn". Thai Forest Bulletin (Botany) (in English and Thai). 3: 1–36.
Craig, W.G. (1922). "Contributions to the Flora of Siam. Additamentum XIII". Bulletin of Miscellaneous Information: 227–241.
Shao, Yunyun; Xu, Fengxia (2017). "Studies on pollen morphology of selected species of Annonaceae from Thailand". Grana. 57 (3): 161–177. doi:10.1080/00173134.2017.1350204. ISSN 0017-3134.

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[1] "Mitrephora winitii Craib". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved April 3, 2019.

[2] Suvarnasuddhi, Khid; Smitinand, Tem (1955). "Descriptions of Plants Named in Honour of Phya Winit Wanandorn". Thai Forest Bulletin (Botany) (in English and Thai). 3: 1–36.

[3] Craig, W.G. (1922). "Contributions to the Flora of Siam. Additamentum XIII". Bulletin of Miscellaneous Information: 227–241.

[ShaoXu2017-4] Shao, Yunyun; Xu, Fengxia (2017). "Studies on pollen morphology of selected species of Annonaceae from Thailand". Grana. 57 (3): 161–177. doi:10.1080/00173134.2017.1350204. ISSN 0017-3134.