Mitrephora williamsii

Mitrephora williamsii is a species of plant in the family Annonaceae. It is native to The Philippines.[1] Charles Budd Robinson, the Canadian botanist who first formally described the species, named it after Robert Statham Williams who collected the specimen that Robinson examined.[2]

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

Description

It is a tree reaching 12 meters in height. Its leaves are 20-32 by 7-11.5 centimeters and come to a point at their tips. The leaves are smooth and shiny green on their upper surfaces while their undersides are brown-green and slightly hairy. Its petioles are 12-18 millimeters long. Its fragrant flowers are red and yellow and are arranged in cymes opposite the leaves. Each flower is on a hairy pedicel 5-8 millimeters long. Its flowers have 3, oval-shaped sepals, 5-6 millimeters long, that come to a point at their tip. Its 6 petals are arranged in two rows of 3. The outer petals are 13-15 by 9-10 millimeters, hairy on their outer surface and smooth inside. The inner petals have a 10 by 2 millimeter claw below a 6-7 by 7.5 millimeter hood-shaped blade which is hairy on its inner surface. It has approximately 200-250 stamens that are 0.8-1 millimeter long.[3]

Reproductive biology

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

gollark: I'm sure you're allowed them under the second amendment or something.
gollark: Anything that is in the world when you’re born is normal and ordinary and is just a natural part of the way the world works. Anything that's invented between when you’re fifteen and thirty-five is new and exciting and revolutionary and you can probably get a career in it. Anything invented after you're thirty-five is against the natural order of things.
gollark: There's some Douglas Adams quote...
gollark: But they obviously define "technology" as "*new* technology", and don't include, say, the power grid.
gollark: - an awfully large amount of people

References
  1. "Mitrephora williamsii C.B.Rob". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved April 3, 2019.
  2. "Williams, Robert Statham (1859-1945)". Global Plants. ITHAKA. n.d. Retrieved April 3, 2019.
  3. Robinson, Charles Budd (1908). "Alabastra Philippinensia - I". Bulletin of the Torrey Botanical Club. 35 (2): 63–75. doi:10.2307/2479141. JSTOR 2479141.
  4. 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.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.