''Elaeagnus umbellata'' is known as Japanese silverberry, umbellata oleaster, autumn olive, autumn elaeagnus, or spreading oleaster. The species is indigenous to eastern

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 are ...

and ranges from the

Himalaya The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 10 ...

s eastwards to

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the n ...

. It is a hardy, aggressive

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 adv ...

able to readily

colonize Colonization, or colonisation, constitutes large-scale population movements wherein migrants maintain strong links with their, or their ancestors', former country – by such links, gain advantage over other inhabitants of the territory. When ...

barren land, becoming a troublesome plant in the central and northeastern United States and Europe.

Description

''Elaeagnus umbellata'' grows as a

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, ...

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 tree ...

or small

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 ...

, typically up to tall, with a dense crown.Parmar, C. and M.K. Kaushal. 1982. ''Elaeagnus umbellata''. p. 23–25. In: ''Wild Fruits''. Kalyani Publishers, New Delhi, India
NewCROP, New Crop Resource Online Program, Purdue University
/ref> It commonly bears sharp thorns in the form of spur branches. Flowers are fragrant and occur in clusters of white to yellow, 8–9 mm in length and 7 mm in diameter, and have four lobes. The

leaves A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, st ...

are alternate, 4–10 cm long and 2–4 cm wide with wavy margins. The leaves are covered with minute silvery scales when they emerge early in spring, but turn greener above as the scales wear off during the summer. The underside is more intensely covered in the silvery scales, differing from the related '' E. angustifolia,'' which remains silvery until it sheds its leaves in the fall.

Flowers

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 mechanis ...

s are borne in the leaf axils in clusters of 1-7. They are pale yellowish-white, fragrant, (often heavily fragrant) and have a four-lobed corolla 1 cm long. They are an important source of nectar for pollinators such as bees.

Fruit

The

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 partic ...

is a small round

drupe In botany, a drupe (or stone fruit) is an indehiscent fruit in which an outer fleshy part ( exocarp, or skin, and mesocarp, or flesh) surrounds a single shell (the ''pit'', ''stone'', or ''pyrena'') of hardened endocarp with a seed (''kernel ...

1/4 to 1/3 inches (0.65 to 0.85 cm) in diameter. The unripe fruit is silvery-scaled and yellow. It ripens to red, dotted with silver or brown. The ripe fruits are pulpy, juicy and sweet, 3–9 mm in length, 5 mm in diameter, and average 137 milligrams in weight, with a thin skin covering the whole fruit. Having a sweet and tart flavor, the berries can be eaten fresh or processed for jam,

condiment A condiment is a preparation that is added to food, typically after cooking, to impart a specific flavor, to enhance the flavor, or to complement the dish. A table condiment or table sauce is more specifically a condiment that is served separat ...

s, flavoring, or used as a substitute for

tomato The tomato is the edible berry of the plant ''Solanum lycopersicum'', commonly known as the tomato plant. The species originated in western South America, Mexico, and Central America. The Mexican Nahuatl word gave rise to the Spanish word ...

. When mature, the red berries contain

carotenoid Carotenoids (), also called tetraterpenoids, are yellow, orange, and red organic pigments that are produced by plants and algae, as well as several bacteria, and fungi. Carotenoids give the characteristic color to pumpkins, carrots, parsnips, ...

s, including considerable amounts of

lycopene Lycopene is an organic compound classified as a tetraterpene and a carotene. Lycopene (from the neo-Latin '' Lycopersicum'', the tomato species) is a bright red carotenoid hydrocarbon found in tomatoes and other red fruits and vegetables. Occu ...

Naturalization

In its origin regions of tropical and temperate Asia, ''E. umbellata'' is not considered to be an

, but in many world regions, it has become invasive across wild and cultivated areas, particularly in the eastern United States. In the early 19th century, ''E. umbellata'' was purposely introduced to the United States and the United Kingdom for

shelter belt A windbreak (shelterbelt) is a planting usually made up of one or more rows of trees or shrubs planted in such a manner as to provide shelter from the wind and to protect soil from erosion. They are commonly planted in hedgerows around the edges ...

s, erosion control, wasteland reclamation, wildlife habitat, and for gardens as an ornamental. By the late 20th century, the shrub became a noxious weed and invasive species in many US states from the east coast to the central prairies, and spread widely across Europe. Due to its substantial seed production and avid germination potential, ''E. umbellata'' rapidly invades new areas where it can resprout readily after burning or cutting. Because ''E. umbellata'' stands are

habitat In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...

s for wildlife, such as providing

forage Forage is a plant material (mainly plant leaves and stems) eaten by grazing livestock. Historically, the term ''forage'' has meant only plants eaten by the animals directly as pasture, crop residue, or immature cereal crops, but it is also use ...

and shelter for

deer Deer or true deer are hoofed ruminant mammals forming the family Cervidae. The two main groups of deer are the Cervinae, including the muntjac, the elk (wapiti), the red deer, and the fallow deer; and the Capreolinae, including the re ...

, nesting sites for birds, and berries as food for several species, it has been planted for

wildlife management Wildlife management is the management process influencing interactions among and between wildlife, its habitats and people to achieve predefined impacts. It attempts to balance the needs of wildlife with the needs of people using the best availabl ...

in parts of the United States. In Europe, ''E. umbellata'' has spread to the United Kingdom, Belgium, France, and Italy, but has been cultivated in the

Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...

and

Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to ...

. In some parts of

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and th ...

where it has become

naturalized Naturalization (or naturalisation) is the legal act or process by which a non-citizen of a country may acquire citizenship or nationality of that country. It may be done automatically by a statute, i.e., without any effort on the part of the in ...

, ''E. umbellata'' is considered a

noxious weed A noxious weed, harmful weed or injurious weed is a weed that has been designated by an agricultural or other governing authority as a plant that is injurious to agricultural or horticultural crops, natural habitats or ecosystems, or humans or li ...

, particularly in the central and

northeastern United States The Northeastern United States, also referred to as the Northeast, the East Coast, or the American Northeast, is a geographic region of the United States. It is located on the Atlantic coast of North America, with Canada to its north, the Southe ...

.Species Profile – Autumn Olive
National Invasive Species Information Center,

National Agricultural Library The United States National Agricultural Library (NAL) is one of the world's largest agricultural research libraries, and serves as a national library of the United States and as the library of the United States Department of Agriculture. Located ...

. Lists general information and resources for ''Elaeagnus umbellata''. In Canada, it is a "prohibited noxious weed" under the ''Alberta Weed Control Act 2010''. Because it fixes atmospheric nitrogen in its roots, ''E. umbellata'' may grow vigorously and sometimes

competitively Competition is a rivalry where two or more parties strive for a common goal which cannot be shared: where one's gain is the other's loss (an example of which is a zero-sum game). Competition can arise between entities such as organisms, indiv ...

in infertile soils. It can increase available nitrogen in soils and benefit some nearby plants, and when grown in orchards, it can increase yields of adjacent fruit trees up to 10%. However, its ability to change soil chemistry can severely alter or destroy native plant communities.https://www.michiganaudubon.org/invasive-species-focus-autumn-olive/

Gallery

File:Autumnolive2.JPG, Leaves File:Honey bee foraging on Autumn Olive.jpg, Blossoms File:Elaeagnus umbellata Frucht.jpg, Ripe fruit File:Elaeagnus_umbellata_fruit.jpg, Ripe fruit File:Elaeagnus umbellata leaf upper surface detail.jpg, Leaf upperside File:Crop of Elaeagnus umbellata leaf upper surface detail.jpg, Zoomed view

References

External links

*
''Elaeagnus umbellata'' images
Bioimages from

Vanderbilt University Vanderbilt University (informally Vandy or VU) is a private research university in Nashville, Tennessee. Founded in 1873, it was named in honor of shipping and rail magnate Cornelius Vanderbilt, who provided the school its initial $1-million ...

, Nashville, TN, USA
Species Profile - Autumn Olive (''Elaeagnus umbellata'')
National Invasive Species Information Center,

United States National Agricultural Library The United States National Agricultural Library (NAL) is one of the world's largest agricultural research libraries, and serves as a national library of the United States and as the library of the United States Department of Agriculture. Located ...

. {{Taxonbar, from=Q367242 umbellata