''Mitrephora weberi'' is a species of

plant Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclud ...

in the family Annonaceae. It is native to The

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

Elmer Drew Merrill Elmer Drew Merrill (October 15, 1876 – February 25, 1956) was an American botanist and taxonomist. He spent more than twenty years in the Philippines where he became a recognized authority on the flora of the Asia-Pacific region. Through t ...

, an American botanist, first formally described the species and named it after Charles Martin Weber who collected the specimen that Merrill examined.

Description

''Mitrephora weberi'' is a tree that can reach 8 meters in height. Its branches have

lenticel A lenticel is a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of dicotyledonous flowering plants. It functions as a pore, providing a ...

s. Its slightly leathery leaves are 10-18 by 4-8 centimeters. The leaves are smooth and shiny green on both surfaces. Its petioles are 7-10 millimeters long. Its flowers are yellow with purple highlights. Its flowers have 3, oval-shaped

sepals A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

, 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 20 by 8 millimeters, hairy on their outer surface and smooth inside. The inner petals are 14 millimeters long and densely hairy on their inner surface. Its

stamens The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filame ...

are 1–1.2 millimeters long. Each flower has 12-15

ovaries The ovary is an organ in the female reproductive system that produces an ovum. When released, this travels down the fallopian tube into the uterus, where it may become fertilized by a sperm. There is an ovary () found on each side of the body. T ...

that are smooth and 1–1.2 millimeters long. Each ovary has about 12

ovules In seed plants, the ovule is the structure that gives rise to and contains the female reproductive cells. It consists of three parts: the ''integument'', forming its outer layer, the ''nucellus'' (or remnant of the megasporangium), and the fe ...

Reproductive biology

The pollen of ''M. weberi'' is shed as permanent tetrads.

Habitat and distribution

It has been observed growing in forests with limestone soils at elevations up to 30 meters.

References

weberi Flora of the Philippines Plants described in 1912 Taxa named by Elmer Drew Merrill {{annonaceae-stub