''Erythrina crista-galli'', often known as the cockspur coral tree, is a flowering

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 ...

in the family

Fabaceae The Fabaceae or Leguminosae,International Code of Nomenc ...

, native to

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

Uruguay Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...

, southern

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 ...

and

Paraguay Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tavakuairetã Paraguái, links=si), is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to th ...

. It is widely planted as a street or garden tree in other countries, notably in

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

. It is known by several common names within South America: ', ' ( Spanish), ' ( Portuguese) and the more ambiguous '' bucaré'', to name a few. Its

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 ...

''crista-galli'' means " cock's comb" in Latin. The ceibo is the national tree of

, and its flower the

national flower In a number of countries, plants have been chosen as symbols to represent specific geographic areas. Some countries have a country-wide floral emblem; others in addition have symbols representing subdivisions. Different processes have been used to ...

of Argentina and

. This species characteristically grows wild in gallery forest ecosystems along watercourses, as well as in

swamp A swamp is a forested wetland.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p. Swamps are considered to be transition zones because both land and water play a role in ...

s and

wetland A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The ...

s. In urban settings, it is often planted in parks for its bright red flowers.

Description

''Erythrina crista-galli'' is a small tree, the girth of its trunk measuring . Normally it grows tall, although some individuals, such as in the Argentine provinces of

Salta Salta () is the capital and largest city in the Argentine province of the same name. With a population of 618,375 according to the 2010 census, it is also the 7th most-populous city in Argentina. The city serves as the cultural and economic ce ...

Jujuy San Salvador de Jujuy (), commonly known as Jujuy and locally often referred to as San Salvador, is the capital and largest city of Jujuy Province in Argentine Northwest, northwest Argentina. Also, it is the seat of the Doctor Manuel Belgrano Depa ...

and Tucumán, can grow up to . The

root In vascular plants, the roots are the organs of a plant that are modified to provide anchorage for the plant and take in water and nutrients into the plant body, which allows plants to grow taller and faster. They are most often below the sur ...

is a taproot with

nodules Nodule may refer to: *Nodule (geology), a small rock or mineral cluster *Manganese nodule, a metallic concretion found on the seafloor *Nodule (medicine), a small aggregation of cells *Root nodule Root nodules are found on the roots of plants, p ...

produced by

nitrogen-fixing Nitrogen fixation is a chemical process by which molecular nitrogen (), with a strong triple covalent bond, in the air is converted into ammonia () or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Atmos ...

bacteria. The bacteria live in

symbiosis Symbiosis (from Greek , , "living together", from , , "together", and , bíōsis, "living") is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasit ...

with the tree, facilitating the tree's absorption of nitrogen in return for organic substances which the bacteria need. The tree's trunk is woody with irregular, spiny branches. These branches form a layer without definite form and die after flowering. Erythrina crista-galli OB UJ Krakow 2017-09-28 5744

Erythrina crista-galli OB UJ Krakow 2017-09-28 5744

Flowers and fruit

The tree flowers in the summer, from October to April in their native South America and from April to October in the northern hemisphere. It usually blooms from November to February. The red

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 ...

, arranged in

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 of the

raceme A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...

type, is pentameric, complete, and of bilateral symmetry. Its calyx is gamosepalous, like a little red thimble. The corolla, like that of other

legume A legume () is a plant in the family Fabaceae (or Leguminosae), or the fruit or seed of such a plant. When used as a dry grain, the seed is also called a pulse. Legumes are grown agriculturally, primarily for human consumption, for livestock f ...

s like common beans, is butterfly-shaped; however, the largest petal, called the "standard", is arranged in the lower part. The two of the petals called "wings" are so small that they are practically hidden within the calyx. The remaining two petals partially fuse together on occasion and form the flower's keel or "carina"; this protects its reproductive organs. The

androecium 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 filam ...

consists of ten

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, one free and nine united by their filaments (gynostemial androecium). The unicarpel gynoecium is welded between the stamens like a knife in its sheath. The flowers are rich in

nectar Nectar is a sugar-rich liquid produced by plants in glands called nectaries or nectarines, either within the flowers with which it attracts pollinating animals, or by extrafloral nectaries, which provide a nutrient source to animal mutualists ...

and are visited by

insect Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs ...

s, which usually have to crawl underneath the carina and thus pollinate the flowers. Erythrina crista-galli MHNT

The tree's fruit is a

, a dry pod a few centimeters in length derived from a single carpel and contains about 8-10 chestnut-brown bean-shaped seeds. The cotyledons are hypogeal, staying underground upon germination.

Cultivation

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 Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...

this plant 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 ...

Synonyms

Synonyms are as follows: (2005)
''Erythrina crista-galli''
Version 10.01, November 2005. Retrieved 26 January 2008. * ''Corallodendron crista-galli'' (L.) Kuntze * ''Erythrina crista-galli'' L. var. ''hasskarlii'' Backer * ''Erythrina crista-galli'' L. var. ''leucochlora''

Lombardo Lombardo is an Italian demonym ("from Lombardy") and surname, most commonly found in Sicily where it is the third most common family name. Notable people with the name include: Surname *Andrea Lombardo (born 1987), Canadian football (soccer) playe ...

* ''Erythrina fasciculata'' Benth. * ''Erythrina laurifolia'' Jacq. * ''Erythrina pulcherrima'' Tod. * ''Erythrina speciosa'' Tod. (However, '' E. speciosa'' Andrews is a distinct species.) * ''Micropteryx crista-galli'' Walp. * ''Micropteryx fasciculata'' Walp. * ''Micropteryx laurifolia'' Walp.

References

:''This article draws heavily on the corresponding article in the Spanish-language Wikipedia.'' * (1904): '' Gardening for the Million''. Fisher Unwin, London
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External links

Día de la Flor Nacional
(National Flower Day) - from Argentina's Ministry of Health and Environment website (scientific description, pictures). {{Taxonbar, from=Q162849 crista-galli Trees of Argentina Trees of Brazil Trees of Paraguay Trees of Uruguay Taxa named by Carl Linnaeus National symbols of Argentina National symbols of Uruguay Garden plants of South America Ornamental trees