''Phalaenopsis amabilis'', commonly known as the moon orchid, moth orchid, or mariposa orchid, is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

in the orchid

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Orchidaceae. It is widely cultivated as a decorative houseplant. It is an

epiphytic An epiphyte is a plant or plant-like organism that grows on the surface of another plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphyt ...

or lithophytic herb with long, thick roots, between two and eight thick, fleshy leaves with their bases hiding the stem and nearly flat, white, long-lasting flowers on a branching flowering stem with up to ten flowers on each branch. ''Phalaenopsis amabilis'' is native to

Maritime Southeast Asia Maritime Southeast Asia comprises the Southeast Asian countries of Brunei, Indonesia, Malaysia, the Philippines, Singapore, and East Timor. The terms Island Southeast Asia and Insular Southeast Asia are sometimes given the same meaning as ...

New Guinea New Guinea (; Hiri Motu: ''Niu Gini''; , fossilized , also known as Papua or historically ) is the List of islands by area, world's second-largest island, with an area of . Located in Melanesia in the southwestern Pacific Ocean, the island is ...

, and

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

. It has three

subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...

: ''P. a. amabilis'', native to the

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

(

Palawan Palawan (, ), officially the Province of Palawan (; ), is an archipelagic province of the Philippines that is located in the region of Mimaropa. It is the largest province in the country in terms of total area of . The capital and largest c ...

Malaysia Malaysia is a country in Southeast Asia. Featuring the Tanjung Piai, southernmost point of continental Eurasia, it is a federation, federal constitutional monarchy consisting of States and federal territories of Malaysia, 13 states and thre ...

(

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...

(Borneo,

Sumatra Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi. ...

, and

Java Java is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea (a part of Pacific Ocean) to the north. With a population of 156.9 million people (including Madura) in mid 2024, proje ...

); ''P. a. moluccana'', native to the

Maluku Islands The Maluku Islands ( ; , ) or the Moluccas ( ; ) are an archipelago in the eastern part of Indonesia. Tectonics, Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located in West ...

( Seram and Buru Islands) and

Sulawesi Sulawesi ( ), also known as Celebes ( ), is an island in Indonesia. One of the four Greater Sunda Islands, and the List of islands by area, world's 11th-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Min ...

of Indonesia; and ''P. a. rosenstromii'', native to

Papua New Guinea Papua New Guinea, officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean n ...

and Australia (northeastern

Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...

). ''Phalaenospsis amabilis'' is one of the three national flowers of Indonesia, where it is known as (lit. "moon orchid").

Description

''Phalaenopsis amabilis'' is an

, rarely lithophytic herb with coarse, flattened, branching roots up to long and usually wide. Between two and eight fleshy, dark green, oblong to egg-shaped leaves long and wide are arranged in two rows along the stem. The stem is but hidden by the leaf bases. The flowers are arranged on a stiff, arching flowering stem long emerging from a leaf base, with a few branches near the tip. Each branch of the flowering stem bears between two and ten white, long-lasting flowers on a stalk (including the

ovary The ovary () is a gonad in the female reproductive system that produces ova; when released, an ovum travels through the fallopian tube/ oviduct into the uterus. There is an ovary on the left and the right side of the body. The ovaries are end ...

) long. Each flower is long and wide with the

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 Etymology The term ''sepalum'' ...

s and

petal Petals are modified leaves that form an inner whorl surrounding the reproductive parts of flowers. They are often brightly coloured or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''corol ...

s free from and spreading widely apart from each other. The sepals are egg-shaped, long and about wide and the petals broadly egg-shaped to almost square, long and wide. The labellum is white with yellow and reddish markings, about long with three lobes. The side lobes curve upwards and partly surround the column. The middle lobe is cross-shaped with a rounded tip and two long, thread-like wavy arms. There is a large yellow callus near the base of the labellum. Flowering time depends on distribution but occurs from April to December in New Guinea.

Taxonomy and naming

In 1750, before the system of

binomial nomenclature In taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, altho ...

had been formalised by

Carl Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...

, Georg Eberhard Rumphius had collected the species on

Ambon Island Ambon Island is part of the Maluku Islands of Indonesia. The island has an area of and is mountainous, well watered, and fertile. Ambon Island consists of two territories: the city of Ambon, Maluku, Ambon to the south, and three districts (''k ...

and described it as ''Angraecum albus majus'' in his book '' Herbarium Amboinense''. Linnaeus described it in ''

Species Plantarum ' (Latin for "The Species of Plants") is a book by Carl Linnaeus, originally published in 1753, which lists every species of plant known at the time, classified into genus, genera. It is the first work to consistently apply binomial nomenclature ...

'' giving it the binomial ''Epidendrum amabile'' and in 1825,

Carl Ludwig Blume Charles Ludwig de Blume or Karl Ludwig von Blume (9 June 1796 – 3 February 1862) was a German-Dutch botanist and entomologist who spent most of his professional life in the Netherlands and the Dutch East Indies. As deputy director of agricul ...

changed the name to ''Phalaenopsis amabilis''. The

specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...

(''amabilis'') is a

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

word meaning "lovely". Subspecies There are three subspecies of ''P. amabilis'' recognised by the

World Checklist of Selected Plant Families The World Checklist of Selected Plant Families (usually abbreviated to WCSP) was an "international collaborative programme that provides the latest peer reviewed and published opinions on the accepted scientific names and synonyms of selected p ...

: * ''Phalaenopsis amabilis'' subsp. ''amabilis'' which is the most widespread subspecies and is distinguished from the other subspecies by its cross-shaped labellum middle lobe, the base of which has yellow and red markings; * ''Phalaenopsis amabilis'' subsp. ''moluccana'' ( Schltr.) Christenson which has a linear-oblong labellum middle lobe, with a slight dilation at its base where there are yellow and white markings; * ''Phalaenopsis amabilis'' subsp. ''rosenstromii'' ( F.M.Bailey) Christenson which has a relatively short, triangular labellum middle lobe where the markings are yellow; In Australia, subspecies ''rosenstromii'' is recognised as ''Phalaenopsis rosenstromii'' by the

Australian Plant Census The Australian Plant Census (APC) provides an online interface to currently accepted, published, scientific names of the vascular flora of Australia, as one of the output interfaces of the national government Integrated Biodiversity Information Sys ...

. It was discovered by Gus Rosenstrom "on trees, high from the ground, Daintree River" and was first formally described by Frederick Manson Bailey who published the description in the ''Queensland Agricultural Journal''.

Distribution and habitat

''Phalaenopsis amabilis'' usually grows on trees, rarely on rocks, in rainforest where the humidity is high but there is free air movement. Subspecies ''amabilis'' has the widest distribution and occurs from

in the southern

and

. Subspecies ''moluccana'' is separated from subspecies ''amabilis'' by the

Wallace Line The Wallace Line or Wallace's Line is a faunal boundary line drawn in 1859 by the British naturalist Alfred Russel Wallace and named by the English biologist Thomas Henry Huxley. It separates the biogeographic realms of Asia and 'Wallacea', a ...

and is found in

as well as Seram and Buru in the Moluccas. Subspecies ''rosenstromii'' is native to New Guinea and

where it occurs on the Cape York Peninsula between the Iron Range and the Paluma Range National Park. It is separated from subspecies ''moluccana'' by Lydekker's Line.

Conservation

''Phalaenopsis rosenstromii'' was listed as "endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 but the listing was updated to ''Phalaenopsis amabilis'' subsp. ''rosenstromii'' in May 2016. The main threat to the subspecies in Australia is illegal collecting.

Use in horticulture

''Phalaenopsis amabilis'' is reported to be very easy to grow as a houseplant, as long as attention is paid to a correct feeding and watering regimen. It thrives in a domestic temperature range of , in bright indirect light such as that offered by an east- or west-facing window. Specialist orchid compost and feed is widely available. Species and cultivars in the genus ''Phalaenopsis'' are recommended for beginners. In cultivation in the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

, ''Phalaenopsis amabilis'' has gained the

Royal Horticultural Society The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr ...

Award of Garden Merit The Award of Garden Merit (AGM) is a long-established award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions. It includes the full range of cultivated p ...

. ''Phalaenopsis amabilis'' is one of the parents of ''Phalaenopsis'' Harriettiae, reportedly the first man-made ''Phalaenopsis'' hybrid, created by John Veitch and recorded in 1887.

Importance

''Phalaenopsis amabilis'' ( meaning "moon orchid") is one of the three national flowers in

, the other two being the sambac jasmine and padma raksasa. It was officially recognized as national "flower of charm" () in Presidential Decree No. 4 in 1993. The orchid is also the official flower of Kota Kinabalu, the capital city of Sabah, Malaysia.

References

External links

* {{Taxonbar, from=Q1069597 amabilis Orchids of Indonesia Orchids of New Guinea Orchids of the Philippines National symbols of Indonesia Plants described in 1753 Taxa named by Carl Linnaeus Lithophytic orchids Epiphytic orchids