The

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

''Mitrephora'', of

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Annonaceae The Annonaceae are a Family (biology), family of flowering plants consisting of trees, shrubs, or rarely lianas commonly known as the custard apple family or soursop family. With 108 accepted genera and about 2400 known species, it is the largest ...

, comprises around 40

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...

s and

shrub A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...

s found in

tropical The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S. The tropics are also referred to ...

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

and northern

Australasia Australasia is a region that comprises Australia, New Zealand and some neighbouring islands in the Pacific Ocean. The term is used in a number of different contexts, including geopolitically, physiogeographically, philologically, and ecologica ...

. The area of distribution extends from

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

in the North (

Hainan Hainan (, ; ) is the smallest and southernmost province of the People's Republic of China (PRC), consisting of various islands in the South China Sea. , the largest and most populous island in China,The island of Taiwan, which is slightly l ...

Yunnan Yunnan , () is a landlocked Provinces of China, province in Southwest China, the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is ...

) down to

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

in the South. The

is widely found in southern

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

(

Karnataka Karnataka (; ISO: , , also known as Karunāḍu) is a state in the southwestern region of India. It was formed on 1 November 1956, with the passage of the States Reorganisation Act. Originally known as Mysore State , it was renamed ''Karnat ...

Kerala Kerala ( ; ) is a state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile regions of Cochin, Malabar, South ...

and

Tamil Nadu Tamil Nadu (; , TN) is a States and union territories of India, state in southern India. It is the List of states and union territories of India by area, tenth largest Indian state by area and the List of states and union territories of India ...

) and

Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...

. It reaches a maximum of diversity in

Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and eas ...

and 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 ...

Description

Mitrephora are a genus of trees that are often tall. They have leathery leaves. They have 3 rounded

sepal 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 ...

s. Their flowers have 6 petals arranged in two

whorls A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral d ...

. The edges of the petals in each whorl touch one another. The exterior petals are oval with somewhat conspicuous venation. The interior petals have a basal

claw A claw is a curved, pointed appendage found at the end of a toe or finger in most amniotes (mammals, reptiles, birds). Some invertebrates such as beetles and spiders have somewhat similar fine, hooked structures at the end of the leg or tarsus ...

with a vaulted blade. Their flowers have numerous oblong to wedge-shapted

stamen 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 ...

with dorsally positioned bi-lobed anthers. Their flowers have hairless

carpels Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' ...

with oblong

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 ...

. Within the ovaries the numerous

ovule 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 ...

s are positioned axially in two rows. Its elongated styles are grooved on the inside.

Species

Species in the Genus include: *'' Mitrephora alba''

Ridl. Henry Nicholas Ridley CMG (1911), MA (Oxon), FRS, FLS, F.R.H.S. (10 December 1855 – 24 October 1956) was an English botanist, geologist and naturalist who lived much of his life in Singapore. He was instrumental in promoting rubber trees ...

*'' Mitrephora aversa'' *'' Mitrephora bousigoniana'' *'' Mitrephora calcarea'' *'' Mitrephora caudata'' *'' Mitrephora celebica'' *'' Mitrephora clemensiorum'' *'' Mitrephora collinsae'' *'' Mitrephora ellipanthoides'' *'' Mitrephora ferruginea'' *'' Mitrephora fragrans'' *'' Mitrephora glabra'' *'' Mitrephora glandulifera'' *'' Mitrephora grandiflora'' *'' Mitrephora heyneana'' *'' Mitrephora keithii'' *'' Mitrephora korthalsiana'' *'' Mitrephora lanotan'' *'' Mitrephora macclurei'' *'' Mitrephora macrocarpa'' *'' Mitrephora maingayi'' *'' Mitrephora multifolia'' *'' Mitrephora obtusa'' *'' Mitrephora pallens'' Jovet-Ast *'' Mitrephora petelotii'' *'' Mitrephora pictiflora'' *'' Mitrephora pisocarpa'' *'' Mitrephora polypyrena'' *'' Mitrephora reflexa'' *'' Mitrephora reticulata'' *'' Mitrephora rugosa'' *'' Mitrephora samarensis'' *'' Mitrephora simeuluensis'' *'' Mitrephora sirikitiae'' *'' Mitrephora sorsogonensis'' *'' Mitrephora teysmannii'' *'' Mitrephora tomentosa'' (synonym ''M. thorelii'') *'' Mitrephora trimera'' *'' Mitrephora vandaeflora'' *'' Mitrephora versteegii'' *'' Mitrephora viridifolia'' *'' Mitrephora vittata'' *'' Mitrephora vulpina'' *'' Mitrephora wangii'' *'' Mitrephora weberi'' *'' Mitrephora williamsii'' *'' Mitrephora winitii'' *'' Mitrephora woodii'' *'' Mitrephora zippeliana''

References

{{Taxonbar, from=Q9033762 Annonaceae genera Taxa named by Thomas Thomson (botanist) Taxa named by Joseph Dalton Hooker Taxa named by Carl Ludwig Blume Plants described in 1855