''Albizia julibrissin'', the Persian silk tree, pink silk tree, or mimosa tree, is a
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 ...
of tree in the
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 ...
,
native
Native may refer to:
People
* Jus soli, citizenship by right of birth
* Indigenous peoples, peoples with a set of specific rights based on their historical ties to a particular territory
** Native Americans (disambiguation)
In arts and entert ...
to
southwestern Asia
Western Asia, West Asia, or Southwest Asia, is the westernmost subregion of the larger geographical region of Asia, as defined by some academics, UN bodies and other institutions. It is almost entirely a part of the Middle East, and includes Ana ...
and
eastern Asia
East Asia is the eastern region of Asia, which is defined in both Geography, geographical and culture, ethno-cultural terms. The modern State (polity), states of East Asia include China, Japan, Mongolia, North Korea, South Korea, and Taiwan. ...
.
The genus is named after the Italian nobleman Filippo degli
Albizzi
The Albizzi family () was a Florentine family originally based in Arezzo, who were rivals of the Medici and Alberti families. They were at the centre of Florentine oligarchy from 1382, in the reaction that followed the Ciompi revolt, to the rise ...
, who introduced it to Europe in the mid-18th century.
It is sometimes incorrectly spelled ''Albizzia''. The
specific epithet
In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...
''julibrissin'' is a corruption of the
Persian
Persian may refer to:
* People and things from Iran, historically called ''Persia'' in the English language
** Persians, the majority ethnic group in Iran, not to be conflated with the Iranic peoples
** Persian language, an Iranian language of the ...
word (), which means "
silk flower" (from "flower" + "
silk
Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the coc ...
").
''Albizia julibrissin'' was described by
Antonio Durazzini
Antonio is a masculine given name of Etruscan origin deriving from the root name Antonius. It is a common name among Romance language-speaking populations as well as the Balkans and Lusophone Africa. It has been among the top 400 most popular male ...
.
John Gilbert Baker
John Gilbert Baker (13 January 1834 – 16 August 1920) was an English botanist. His son was the botanist Edmund Gilbert Baker (1864–1949).
Biography
Baker was born in Guisborough in North Yorkshire, the son of John and Mary (née Gilber ...
used the same scientific name to refer to Prain's ''
Albizia kalkora'', the ''Mimosa kalkora'' of
William Roxburgh
William Roxburgh FRSE FRCPE Linnean Society of London, FLS (3/29 June 1751 – 18 February 1815) was a Scottish people, Scottish surgeon and botanist who worked extensively in India, describing species and working on economic botany. He is known ...
.
Names
''Albizia julibrissin'' is known by a wide variety of common names, such as Persian silk tree and pink siris. It is also called
Lankaran
Lankaran ( az, Lənkəran, ) is a city in Azerbaijan, on the coast of the Caspian Sea, near the southern border with Iran. As of 2021, the city had a population of 89,300. It is next to, but independent of, Lankaran District. The city forms a dis ...
acacia or bastard tamarind, though it is not too closely related to either genus. The species is called Chinese silk tree, silk tree or mimosa in the United States, which is misleading—the former can refer to any species of ''
Albizia
''Albizia'' is a genus of more than 160 species of mostly fast-growing subtropical and tropical trees and shrubs in the subfamily Mimosoideae of the family Fabaceae. The genus is pantropical, occurring in Asia, Africa, Madagascar, America and A ...
'' which is most common in any one locale; and, although once included in ''
Mimosa
''Mimosa'' is a genus of about 590 species of herbs and shrubs, in the mimosoid clade of the legume family Fabaceae. The generic name is derived from the Greek word (''mimos''), an "actor" or "mime", and the feminine suffix -''osa'', "resembl ...
'', neither is it very close to the
Mimoseae. To add to the confusion, several species of ''
Acacia
''Acacia'', commonly known as the wattles or acacias, is a large genus of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa and Australasia. The genus na ...
'', notably ''
Acacia baileyana
''Acacia baileyana'' or Cootamundra wattle is a shrub or tree in the flowering plant family Fabaceae. The scientific name of the species honours the botanist Frederick Manson Bailey. It is indigenous to a very small area in southern inland New S ...
'' and ''
Acacia dealbata
''Acacia dealbata'', the silver wattle, blue wattle or mimosa, is a species of flowering plant in the legume family (botany), family Fabaceae, native plant, native to southeastern Australia in New South Wales, Victoria, Tasmania, and the Australi ...
'', are also known as "mimosa" (especially in
floristry
Floristry is the production, commerce, and trade in flowers. It encompasses flower care and handling, floral design and arrangement, merchandising, production, display and flower delivery. Wholesale florists sell bulk flowers and related sup ...
), and many
trees with highly divided leaves are called thus in
horticulture
Horticulture is the branch of agriculture that deals with the art, science, technology, and business of plant cultivation. It includes the cultivation of fruits, vegetables, nuts, seeds, herbs, sprouts, mushrooms, algae, flowers, seaweeds and no ...
.
![Jungpflanze des Seidenbaums (Schlafbaum)](https://upload.wikimedia.org/wikipedia/commons/c/cd/Jungpflanze_des_Seidenbaums_%28Schlafbaum%29.png)
Its leaves slowly close during the night and during periods of rain, the leaflets bowing downward; thus its modern Persian name () means "night sleeper". This tendency also explains the Chinese common name hehuan, which means "shut happy" and symbolizes a happy couple in bed.
In Japan its common names are , and which all mean "sleeping tree". Nemu tree is a partial translation of .
Description
''Albizia julibrissin'' is a small
deciduous
In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, aft ...
tree with a broad crown of level or arching branches, growing to tall.
Its
bark is dark greenish grey, becoming vertically striped with age. Its
leaves
A leaf (plural, : leaves) is any of the principal appendages of a vascular plant plant stem, stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", wh ...
are large and
frond
A frond is a large, divided leaf. In both common usage and botanical nomenclature, the leaves of ferns are referred to as fronds and some botanists restrict the term to this group. Other botanists allow the term frond to also apply to the lar ...
-like: They are
bipinnate
The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular o ...
, divided into 6–12 pairs of pinnae, each with 20–30 pairs of leaflets. Individual leaflets are oblong, long and broad. The true leaves are long and broad.
![Eurema blanda laying eggs by kadavoor](https://upload.wikimedia.org/wikipedia/commons/b/b7/Eurema_blanda_laying_eggs_by_kadavoor.JPG)
The
flower
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechani ...
s bloom throughout the summer in dense
inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...
s, which resemble starbursts of pink silky threads. The true flowers have small
calyx and
corolla (except the central ones), with a tight cluster of prominent
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 ...
s, 2–3 cm long and white or pink with a white base. They have been observed to attract
bee
Bees are winged insects closely related to wasps and ants, known for their roles in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyly, monophyletic lineage within the ...
s,
butterflies
Butterflies are insects in the macrolepidopteran clade Rhopalocera from the Order (biology), order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. The ...
and
hummingbird
Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With about 361 species and 113 genera, they occur from Alaska to Tierra del Fuego, but the vast majority of the species are found in the tropics aro ...
s.
Its
fruit
In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering.
Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in particu ...
is a flat brown
pod long and broad, containing several
seeds
A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiosperm pl ...
inside.
There are two
varieties
Variety may refer to:
Arts and entertainment Entertainment formats
* Variety (radio)
* Variety show, in theater and television
Films
* ''Variety'' (1925 film), a German silent film directed by Ewald Andre Dupont
* ''Variety'' (1935 film), ...
:
* ''Albizia julibrissin'' var. ''julibrissin'' – the typical variety, described above
* ''Albizia julibrissin'' var. ''mollis'' – differs in the shoots being densely hairy
Habitat, cultivation and uses
Original habitats of the tree include regions from
Iran
Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...
(Persia) and the
Republic of Azerbaijan
A republic () is a "state in which power rests with the people or their representatives; specifically a state without a monarchy" and also a "government, or system of government, of such a state." Previously, especially in the 17th and 18th ...
to
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 ...
and
Korea
Korea ( ko, 한국, or , ) is a peninsular region in East Asia. Since 1945, it has been divided at or near the 38th parallel, with North Korea (Democratic People's Republic of Korea) comprising its northern half and South Korea (Republic o ...
.
''A. julibrissin'' is widely planted as an
ornamental plant
Ornamental plants or garden plants are plants that are primarily grown for their beauty but also for qualities such as scent or how they shape physical space. Many flowering plants and garden varieties tend to be specially bred cultivars that i ...
in parks and gardens, grown for its fine leaf texture, flowers and attractive horizontal canopy. Other positive attributes are a fast growth rate, low water requirements and the ability to thrive planted in full sun in hot summer climates.
It is frequently planted in semi-arid areas like California's
Central Valley, central
Texas
Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...
and
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
. Although capable of surviving drought, growth will be stunted and the tree tends to look sickly. As such it should be given infrequent, deep waterings during the summer, which will benefit growth and flowering.
The broad crown of a mature tree makes it useful for providing dappled shade. The flower colour varies from white in ''A. julibrissin'' f. ''alba'', to rich red-tipped flowers. Variants with cream or pale yellow flowers are also reported. Other cultivars are becoming available: 'Summer Chocolate' has red foliage ageing to dark bronze, with pale pink flowers; 'Ishii Weeping' (or 'Pendula') has a drooping growth habit.
''A. julibrissin'' f. ''rosea''
There is also a
form
Form is the shape, visual appearance, or configuration of an object. In a wider sense, the form is the way something happens.
Form also refers to:
*Form (document), a document (printed or electronic) with spaces in which to write or enter data
...
, ''A. julibrissin'' f. ''rosea'' (pink silk tree) which has, in the past, been classed either as a variety or as a
cultivar
A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, ...
. This is a smaller tree, only growing to tall, with the flowers always pink. Native to the northeast of the species' range in Korea and Northern China, it is more cold-tolerant than the typical form, surviving temperatures down to at least . The selected
cultivar
A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, ...
''A. julibrissin'' 'Ernest Wilson' (also known as 'E.H.Wilson' or 'Rosea') is a cold-tolerant tree with deep pink flower colour. In Japan, ''A. julibrissin'' f. ''rosea'' is often used for non-traditional
bonsai
Bonsai ( ja, 盆栽, , tray planting, ) is the Japanese art of growing and training miniature trees in pots, developed from the traditional Chinese art form of ''penjing''. Unlike ''penjing'', which utilizes traditional techniques to produce ...
. The name (,
Kanji
are the logographic Chinese characters taken from the Chinese family of scripts, Chinese script and used in the writing of Japanese language, Japanese. They were made a major part of the Japanese writing system during the time of Old Japanese ...
: ) and its variants is a ''
kigo
is a word or phrase associated with a particular season, used in traditional forms of Japanese poetry. Kigo are used in the collaborative linked-verse forms renga and renku, as well as in haiku, to indicate the season referred to in the stan ...
'' representing the summer in
haiku
is a type of short form poetry originally from Japan. Traditional Japanese haiku consist of three phrases that contain a ''kireji'', or "cutting word", 17 '' on'' (phonetic units similar to syllables) in a 5, 7, 5 pattern, and a ''kigo'', or se ...
, especially a sleepy summer evening.
''A. julibrissin'' f. ''rosea'' 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 (Nort ...
's
Award of Garden Merit
The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions.
History
The Award of Garden Merit ...
; likewise the cultivar 'Summer Chocolate'.
Other uses
The sweet-scented flowers are a good
nectar source
A nectar source is a flowering plant that produces nectar as part of its reproductive strategy. These plants create nectar, which attract pollinating insects and sometimes other animals such as birds.
Nectar source plants are important for beekee ...
for
honeybee
A honey bee (also spelled honeybee) is a eusocial flying insect within the genus ''Apis'' of the bee clade, all native to Afro-Eurasia. After bees spread naturally throughout Africa and Eurasia, humans became responsible for the current cosmo ...
s and butterflies. In Central America, the thornbug (''
Umbonia spinosa'') prefer its branches for mating and overwintering.
There is conflicting information on the toxicity of pods and seeds to humans and animals; some parts of the plant may contain neurotoxin.
Silk tree wood may be used to make furniture.
Pink silk tree can be used to treat the effects of stinging nettle (''Urtica dioica'') by rubbing the leaves in hand and then applying to the rash area. Relief is almost instantaneous.
Invasive species
![Silktreemap](https://upload.wikimedia.org/wikipedia/commons/c/c9/Silktreemap.PNG)
In the wild, the tree tends to grow in dry plains, sandy valleys, and uplands. It has become an
invasive species
An invasive species otherwise known as an alien is an introduced organism that becomes overpopulated and harms its new environment. Although most introduced species are neutral or beneficial with respect to other species, invasive species ad ...
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 ...
, where it has spread from southern New York, New Jersey and Connecticut, west to Missouri and Illinois, and south to Florida and Texas. It is cultivated in California and Oregon. Its seeds are wind-dispersed and numerous, and they are fertile even over long periods of drought. Each pod, which resembles a flattened bean pod made of paper, holds about 8 seeds on average. The pod bursts in strong winds, and the seeds can carry over surprisingly long distances.
Breeding work is currently underway in the United States to produce ornamental plants which will not set seed and can be planted without risk. However, in the eastern United States it is generally a short-lived tree, being highly susceptible to mimosa vascular wilt,
Fusarium Wilt of Mimosa (''Albizia julibrissin'')
Virginia Cooperative Extension a fungal disease caused by a species of ''Fusarium
''Fusarium'' is a large genus of filamentous fungi, part of a group often referred to as hyphomycetes, widely distributed in soil and associated with plants. Most species are harmless saprobes, and are relatively abundant members of the soil mi ...
'', though the disease does not seem to have seriously impacted its populations. Because of its invasive tendencies and disease susceptibility, it is rarely recommended as an ornamental plant in the United States, though it is still widely planted in parts of Europe.
References
External links
''Albizia julibrissin'' List of Chemicals (Dr. Duke's Databases)
{{taxonbar, from=Q750307
julibrissin
Fodder
Naturalized trees of Alabama
Trees of Europe
Plants used in traditional Chinese medicine
Trees of Korea