''Thespesia populnea'', commonly known as the portia tree (), Pacific rosewood, Indian tulip tree, or milo, among other names, is a species of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

belonging to the mallow family,

Malvaceae Malvaceae, or the mallows, is a family of flowering plants estimated to contain 244 genera with 4225 known species. Well-known members of economic importance include okra, cotton, cacao and durian. There are also some genera containing familiar ...

. It is a

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 ...

found commonly on coasts around the world. Although it is confirmed to be native only to the

Old World The "Old World" is a term for Afro-Eurasia that originated in Europe , after Europeans became aware of the existence of the Americas. It is used to contrast the continents of Africa, Europe, and Asia, which were previously thought of by the ...

tropics, other authorities consider it to have a wider, possibly

pantropical A pantropical ("all tropics") distribution is one which covers Tropics, tropical regions of both hemispheres. Examples of species include caecilians, modern sirenians and the plant genera ''Acacia'' and ''Bacopa''. ''Neotropical'' is a zoogeogra ...

native distribution. It is thought to be an invasive species in

Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...

and

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

Distribution

''Thespesia populnea'' is native to tropical coastlines and is adapted for

oceanic dispersal Oceanic dispersal is a type of biological dispersal that occurs when terrestrial organisms transfer from one land mass to another by way of a sea crossing. Island hopping is the crossing of an ocean by a series of shorter journeys between island ...

and growth in island environments. It is known from both coasts of

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

, tropical

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 ...

, northern

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 ...

, the

Pacific Islands Collectively called the Pacific Islands, the islands in the Pacific Ocean are further categorized into three major island groups: Melanesia, Micronesia, and Polynesia. Depending on the context, the term ''Pacific Islands'' may refer to one of se ...

(including

Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only stat ...

), the tropical Pacific coast of the

Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th ...

from

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

south to

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

, the

West Indies The West Indies is a subregion of North America, surrounded by the North Atlantic Ocean and the Caribbean Sea that includes 13 independent island countries and 18 dependencies and other territories in three major archipelagos: the Greater A ...

, and

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. Its exact native distribution has been debated, with most authorities considering it to only be native to the Old World tropics, some others such as

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

including the Pacific Islands in its native range, and others such as the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...

and the

USDA The United States Department of Agriculture (USDA) is the federal executive department responsible for developing and executing federal laws related to farming, forestry, rural economic development, and food. It aims to meet the needs of com ...

also including the tropical Americas within its native range. The IUCN only considers ''T. populnea'' to be introduced and invasive in Florida. It may also be invasive in northern

. Like the related ''

Hibiscus tiliaceus ''Hibiscus tiliaceus'', commonly known as the sea hibiscus or coast cottonwood, is a species of flowering tree in the mallow family, Malvaceae, with a pantropical distribution along coastlines. It has also been introduced to Florida and New Zea ...

'', it was one of the main sources of

bast fiber Bast fibre (also called phloem fibre or skin fibre) is plant fibre collected from the phloem (the "inner bark", sometimes called "skin") or bast surrounding the stem of certain dicotyledonous plants. It supports the conductive cells of the phlo ...

s for the production of cordage and wood for Austronesian

outrigger ship Outrigger boats are various watercraft featuring one or more lateral support floats known as outriggers, which are fastened to one or both sides of the main hull. They can range from small dugout canoes to large plank-built vessels. Outrigger ...

s and carving. Though the plant seeds can survive for months on sea currents, no remains of ''T. populnea'' have been recovered from Polynesia prior to the

Austronesian expansion The Austronesian peoples, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples in Taiwan, Maritime Southeast Asia, Micronesia, coastal New Guinea, Island Melanesia, Polynesia, and Madagascar that speak Austron ...

(c. 5,000 BP), thus it is regarded by some authors as a

canoe plant One of the major human migration events was the maritime settlement of the islands of the Indo-Pacific by the Austronesian peoples, believed to have started from at least 5,500 to 4,000 BP (3500 to 2000 BCE). These migrations were accompanied ...

, deliberately carried and introduced by Austronesian voyagers in the islands they settled. However, it is still considered questionably indigenous to the Pacific islands, including Hawaii, by many other authorities. In Hawaii, it is classified as a native species and is used in

habitat restoration Restoration ecology is the scientific study supporting the practice of ecological restoration, which is the practice of renewing and restoring degraded, damaged, or destroyed ecosystems and habitats in the environment by active human interrupt ...

projects for the degraded

Hawaiian tropical dry forests The Hawaiian tropical dry forests are a tropical dry broadleaf forest ecoregion in the Hawaiian Islands. They cover an area of on the leeward side of the main islands and the summits of Niihau and Kahoolawe. These forests are either seasona ...

alongside the definitively native tree species ''

Dodonaea viscosa ''Dodonaea viscosa'', also known as the broadleaf hopbush, is a species of flowering plant in the ''Dodonaea'' (hopbush) genus that has a cosmopolitan distribution in Tropics, tropical, Subtropics, subtropical and warm temperate regions of Africa ...

'' and ''

Cordia subcordata ''Cordia subcordata'' is a species of flowering tree in the borage family, Boraginaceae, that occurs in eastern Africa, South Asia, Southeast Asia, northern Australia and the Pacific Islands (including Hawaii). The plant is known by a variety o ...

''.

Description

The Portia tree reaches a height of tall and its trunk can measure up to in diameter. It grows at elevations from sea level to in areas that receive of annual rainfall. The Portia tree is able to grow in the wide range of

soil Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life. Some scientific definitions distinguish ''dirt'' from ''soil'' by restricting the former te ...

types that may be present in

coast The coast, also known as the coastline or seashore, is defined as the area where land meets the ocean, or as a line that forms the boundary between the land and the coastline. The Earth has around of coastline. Coasts are important zones in n ...

al environments, including soils derived from

quartz Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical form ...

(

sand Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class of s ...

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms whe ...

, and

basalt Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...

; it favours neutral soils ( pH of 6–7.4). Pollen grains are approximately 70 microns in diameter.

Uses

The

heartwood Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulose fibers that are strong in tension and embedded in a matrix of lignin tha ...

of the Portia tree is dark reddish brown to chocolate brown and has a

specific gravity Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water (molecule), wa ...

of 0.55 to 0.89. Portia tree is known as ''milo'' or ''miro'' in Polynesian languages. It is popular in

for

woodworking Woodworking is the skill of making items from wood, and includes cabinet making (cabinetry and furniture), wood carving, woodworking joints, joinery, carpentry, and woodturning. History Along with Rock (geology), stone, clay and animal parts, ...

(commonly turned into bowls) because of the range of colours expressed (tan, through yellow, to red). The trees were regarded as sacred in

Polynesian culture Polynesian culture is the culture of the indigenous peoples of Polynesia who share common traits in language, customs and society. The development of Polynesian culture is typically divided into four different historical eras: *Exploration and se ...

, and were commonly planted in ''

marae A ' (in New Zealand Māori, Cook Islands Māori, Tahitian), ' (in Tongan), ' (in Marquesan) or ' (in Samoan) is a communal or sacred place that serves religious and social purposes in Polynesian societies. In all these languages, the term a ...

'' sites along with trees like ''

Ficus ''Ficus'' ( or ) is a genus of about 850 species of woody trees, shrubs, vines, epiphytes and hemiepiphytes in the family Moraceae. Collectively known as fig trees or figs, they are native throughout the tropics with a few species extending in ...

'', ''

Fagraea berteroana ''Fagraea berteroana'' ( orth. variant ''F. berteriana''), commonly known as the pua keni keni, pua kenikeni or perfume flower tree, is a small spreading tree or a large shrub which grows in the sub-tropics, where temperatures are 10 °C ...

'', ''

Casuarina equisetifolia ''Casuarina equisetifolia'', common names ''Coastal She-oak'' or ''Horsetail She-oak'' (sometimes referred to as the Australian pine tree or whistling pine tree outside Australia), is a she-oak species of the genus ''Casuarina''. The native ...

'' and ''

Calophyllum inophyllum ''Calophyllum inophyllum'' is a large evergreen plant, commonly called tamanu, oil-nut, mastwood, beach calophyllum or beautyleaf. It is native to tropical Asia and Wallacea. Due to its importance as a source of timber for the traditional shipbu ...

''. Traditionally it was planted in sacred groves and used for religious sculpture throughout eastern

Polynesia Polynesia () "many" and νῆσος () "island"), to, Polinisia; mi, Porinihia; haw, Polenekia; fj, Polinisia; sm, Polenisia; rar, Porinetia; ty, Pōrīnetia; tvl, Polenisia; tkl, Polenihia (, ) is a subregion of Oceania, made up of ...

. In

Tahiti Tahiti (; Tahitian ; ; previously also known as Otaheite) is the largest island of the Windward group of the Society Islands in French Polynesia. It is located in the central part of the Pacific Ocean and the nearest major landmass is Austr ...

, Milo wood is used in the making of the to'ere (slotted wooden drum), used in traditional Tahitian tribal drumming. ''Makoi'' was used for the

rongorongo Rongorongo (Rapa Nui: ) is a system of glyphs discovered in the 19th century on Rapa Nui (Easter Island) that appears to be writing or proto-writing. Numerous attempts at decipherment have been made, with none being successful. Although some c ...

tablets of

Easter Island Easter Island ( rap, Rapa Nui; es, Isla de Pascua) is an island and special territory of Chile in the southeastern Pacific Ocean, at the southeasternmost point of the Polynesian Triangle in Oceania. The island is most famous for its nearl ...

. Since the advent of

aluminium Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. I ...

-hulled boats in the 20th century, Pitcairners have made regular trips to Henderson Island to harvest ''miro'' wood. Usually they venture to Henderson only once per year, but may make up to three trips if the weather is favourable. Pitcairners carve the wood into curios, from which they derive much of their income. In New Ireland, Portia wood is used to make

hourglass drum Hourglass drums are a sub-category of membranophone, or drum, characterized by an hourglass shape. They are also known as ''waisted drums''. Drumheads are attached by laces, which may be squeezed during a performance to alter the pitch. The cate ...

s. In

Tonga Tonga (, ; ), officially the Kingdom of Tonga ( to, Puleʻanga Fakatuʻi ʻo Tonga), is a Polynesian country and archipelago. The country has 171 islands – of which 45 are inhabited. Its total surface area is about , scattered over in ...

, its bark is used to treat mouth infections among infants, and its wood is used to make canoes, house parts, and artwork.Pawley, Andrew; Osmond, Meredith (eds). 2008
''The lexicon of Proto Oceanic: The culture and environment of ancestral Oceanic society''
Volume 3
Plants
Pacific Linguistics 599. Canberra: Pacific Linguistics, Australian National University. In

South Asia South Asia is the southern subregion of Asia, which is defined in both geographical and ethno-cultural terms. The region consists of the countries of Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka.;;;;;;;; ...

, it is used to make the ''

thavil A ''thavil'' (Tamil:தவில்) or ''tavil'' is a barrel-shaped percussion instrument from Tamil Nadu. It is also widely used in Andhra Pradesh, Karnataka, Kerala, Tamilnadu and Telangana States of South India. It is used in temple, folk ...

,'' a Carnatic musical instrument of

South India South India, also known as Dakshina Bharata or Peninsular India, consists of the peninsular southern part of India. It encompasses the Indian states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, and Telangana, as well as the union territo ...

. The flower of the Portia tree played a part in

Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...

independence movement Independence is a condition of a person, nation, country, or state in which residents and population, or some portion thereof, exercise self-government, and usually sovereignty, over its territory. The opposite of independence is the statu ...

, when it was sold on

Remembrance Day Remembrance Day (also known as Poppy Day owing to the tradition of wearing a remembrance poppy) is a memorial day observed in Commonwealth member states since the end of the First World War to honour armed forces members who have died in t ...

by the

Suriya-Mal Movement The Suriya-Mal Movement was formed in the British colony of Ceylon to sell ''Suriya'' flowers on Poppy Day for the benefit of Sri Lankan ex-servicemen. The movement became anti-imperialist in character, and was also involved in relief work during ...

instead of the

poppy A poppy is a flowering plant in the subfamily Papaveroideae of the family Papaveraceae. Poppies are herbaceous plants, often grown for their colourful flowers. One species of poppy, ''Papaver somniferum'', is the source of the narcotic drug opi ...

to aid Sri Lankan

ex-servicemen A veteran () is a person who has significant experience (and is usually adept and esteemed) and expertise in a particular occupation or field. A military veteran is a person who is no longer serving in a military. A military veteran that has ...

. The wood from the tree was used by early Tamil people to make instruments in ancient

Tamilakam Tamiḻakam (Tamil: தமிழகம்; Malayalam: തമിഴകം), refers to the geographical region inhabited by the ancient Tamil people, covering the southernmost region of the Indian subcontinent. Tamilakam covered today's Tamil Nad ...

. It can be used for the cellulose production from the plants ingh et al 2019 In some parts of the world, such as

and 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 ...

, ''T. populnea'' is considered an important species in

projects for coastal dry forests.

References

External links

* *
Images on Wikipedia commons
{{Taxonbar, from=Q715739 populnea Plants described in 1807 Flora of Africa Flora of Micronesia Flora of the Northern Mariana Islands Flora of Guam Flora of Oceania Flora of temperate Asia Flora of tropical Asia Flora of Australia Flora of Mexico Flora of the Pacific Flora of South America Pantropical flora Flora without expected TNC conservation status

Distribution

Description

Uses

See also

References

Further reading

External links