Elaeagnaceae | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Rosales |
Family: | Elaeagnaceae Juss. 1789 [1] |
Type genus | |
Elaeagnus L., 1753 | |
Genera | |
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Synonyms [1] | |
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The Elaeagnaceae are a plant family, the oleaster family, of the order Rosales comprising small trees and shrubs, native to temperate regions of the Northern Hemisphere, south into tropical Asia and Australia. The family has about 60 species in three genera. [2]
They are commonly thorny, with simple leaves often coated with tiny scales or hairs. Most of the species are xerophytes (found in dry habitats); several are also halophytes, tolerating high levels of soil salinity.
The Elaeagnaceae often harbor nitrogen-fixing actinomycetes of the genus Frankia in root nodules, making them useful for soil reclamation. [3] This characteristic, together with their production of plentiful seeds, often results in the Elaeagnaceae being regarded as weeds.
The stems and leaves are covered with silvery brown or golden hairs which are either peltate or scaly. Shepherdia and Hippophae are unisexual, the female and male borne on different plants (dioecious). There are no petals, the perianth comprising a single whorl of two to eight fused sepals. In the male flower the receptacle is often flat, while in the bisexual and female flowers it is tubular, there are four to eight stamens with free filaments and bilocular anthers. The ovary is superior with one carpel containing a single erect anatropous ovule. The style is long and bears a single stigma. The fruit is an achene or a drupe like structure enclosed by the thickened lower part of the persistent calyx. It contains a single seed with little or no endosperm and a straight embryo with thick fleshy cotyledons. A number of species are grown as ornamental shrubs, notably Elaeagnus angustifolia (oleaster), Elaeagnus pungens , Elaeagnus umbellata and Elaeagnus macrophylla , which are mainly grown as deciduous or evergreen shrubs for their attractive foliage and Hippophae rhamnoides (sea buckthorn) for its bright orange berries in autumn and winter. The fruits of a number of species are edible, for example those of Shepherdia argentea (silver buffalo berry). Its fruits are used as jelly and are also eaten dried with sugar in various parts of the United States of America and Canada. The berries of Shepherdia canadensis (russet buffalo berry) when dried or smoked are used as food by Inuit, Yupik and Aleut peoples. The berries of Hippophae rhamnoides are made into a sauce in France and into jelly elsewhere. The wood of this species is fine-grained and is used for turnery. The fruit of the Japanese shrub Elaeagnus multiflora (cherry elaeagnus) are used as preserves and are used in alcoholic beverage. [4]
Modern molecular phylogenetics suggest the following relationships: [5]
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Fossil pollen of Elaeagnacites is described from the late Cretaceous (Santonian) of China and pollen similar to that of Elaeagnaceae is widespread in the Paleocene. [6] There are pollen evidence of Elaeagnus from the upper Eocene Florissant Formation, Colorado, McGinitie's Wardell Ranch Flora locality in Colorado of middle to late middle Eocene and similar samples from the Washakie Basin Laney Shale Member of early Eocene. [7] A fossil †Elaeagnus orchidioides flower is recorded from the late Pliocene of Willershausen (Kalefeld), Hesse, Germany. There are two fossil wood records with extensive documentation of anatomical features: †Elaeagnus semiannulipora from the early Miocene of Yamagata, Japan and †EIeagnaceoxylon shepherdioides, considered similar to Shepherdia , from the Pliocene Beaufort Formation, northwestern Banks Island, Canada. Four fossil leaves have been described with diagnostic features of Elaeagnus from the late Miocene of eastern Tibet, modern altitude of 3910 m The silverberry genus Elaeagnus (Elaeagnaceae) reaches its greatest diversity (54 species) and endemism (36 species) in this area. The diversification of Elaeagnus in the Qinghai-Tibet Plateau and adjacent areas might have been driven by continuous uplift at least since the late Miocene, causing formation of complex topography and climate with high rainfall seasonality. [8]
Betulaceae, the birch family, includes six genera of deciduous nut-bearing trees and shrubs, including the birches, alders, hazels, hornbeams, hazel-hornbeam, and hop-hornbeams numbering a total of 167 species. They are mostly natives of the temperate Northern Hemisphere, with a few species reaching the Southern Hemisphere in the Andes in South America. Their typical flowers are catkins and often appear before leaves.
Lythraceae is a family of flowering plants, including 32 genera, with about 620 species of herbs, shrubs, and trees. The larger genera include Cuphea, Lagerstroemia (56), Nesaea (50), Rotala (45), and Lythrum (35). It also includes the members of the former families of the pomegranate and of the water caltrop. Lythraceae has a worldwide distribution, with most species in the tropics, but ranging into temperate climate regions as well.
The Ulmaceae are a family of flowering plants that includes the elms, and the zelkovas. Members of the family are widely distributed throughout the north temperate zone, and have a scattered distribution elsewhere except for Australasia.
Hamamelidaceae, commonly referred to as the witch-hazel family, is a family of flowering plants in the order Saxifragales. The clade consists of shrubs and small trees positioned within the woody clade of the core Saxifragales. An earlier system, the Cronquist system, recognized Hamamelidaceae in the Hamamelidales order.
The Florissant Formation is a sedimentary geologic formation outcropping around Florissant, Teller County, Colorado. The formation is noted for the abundant and exceptionally preserved insect and plant fossils that are found in the mudstones and shales. Based on argon radiometric dating, the formation is Eocene in age and has been interpreted as a lake environment. The fossils have been preserved because of the interaction of the volcanic ash from the nearby Thirtynine Mile volcanic field with diatoms in the lake, causing a diatom bloom. As the diatoms fell to the bottom of the lake, any plants or animals that had recently died were preserved by the diatom falls. Fine layers of clays and muds interspersed with layers of ash form "paper shales" holding beautifully-preserved fossils. The Florissant Fossil Beds National Monument is a national monument established to preserve and study the geology and history of the area.
Winteraceae is a primitive family of tropical trees and shrubs including 93 species in five genera. It is of particular interest because it is such a primitive angiosperm family, distantly related to Magnoliaceae, though it has a much more southern distribution. Plants in this family grow mostly in the southern hemisphere, and have been found in tropical to temperate climate regions of Malesia, Oceania, eastern Australia, New Zealand, Madagascar and the Neotropics, with most of the genera concentrated in Australasia and Malesia. The five genera, Takhtajania, Tasmannia, Drimys, Pseudowintera, and Zygogynum s.l. all have distinct geographic extant populations. Takhtajania includes a single species, T. perrieri, endemic only to Madagascar, Tasmannia has the largest distribution of genera in Winteraceae with species across the Philippines, Borneo, New Guinea, Eastern Australia, and Tasmannia, Drimys is found in the Neotropical realm, from southern Mexico to the subarctic forests of southern South America, Pseudowintera is found only in New Zealand, and Zygogynum has species in New Guinea and New Caledonia.
Hippophae is the genus of sea buckthorns, deciduous shrubs in the family Elaeagnaceae. The name sea buckthorn may be hyphenated to avoid confusion with the unrelated true buckthorns. It is also referred to as sandthorn, sallowthorn, or seaberry. It produces orange-yellow berries, which have been used over centuries as food, traditional medicine, and skin treatment in Mongolia, Ladakh, Russia, Ukraine, and northern Europe, which are its origin regions.
Shepherdia, commonly called buffaloberry or bullberry, is a genus of small shrubs in the Elaeagnaceae family. The plants are native to northern and western North America. They are non-legume nitrogen fixers.
Elaeocarpaceae is a family of flowering plants. The family contains approximately 615 species of trees and shrubs in 12 genera. The largest genera are Elaeocarpus, with about 350 species, and Sloanea, with about 120.
Frangula is a genus of about 35 species of flowering shrubs or small trees, commonly known as alder buckthorn in the buckthorn family Rhamnaceae. The common name buckthorn is also used to describe species of the genus Rhamnus in the same family and also sea-buckthorn, Hippophae rhamnoides in the Elaeagnaceae.
Coriaria is the sole genus in the family Coriariaceae, which was described by Linnaeus in 1753. It includes 14 species of small trees, shrubs and subshrubs, with a widespread but disjunct distribution across warm temperate regions of the world, occurring as far apart as the Mediterranean region, southern and eastern Asia, New Zealand, the Pacific Ocean islands, and Central and South America.
Hippophae rhamnoides, also known as sea-buckthorn, is a species of flowering plant in the family Elaeagnaceae, native to the cold-temperate regions of Europe and Asia. It is a spiny deciduous shrub. The plant is used in the food and cosmetics industries, in traditional medicine, as animal fodder, in horticulture, and for ecological purposes.
Cephalotaxus, commonly called plum yew or cowtail pine, is a genus of conifers comprising 11 species, either considered the only member of the family Cephalotaxaceae, or in the Taxaceae when that family is considered in a broad sense. The genus is endemic to eastern Asia, though fossil evidence shows it had a wider Northern Hemisphere distribution in the past. The species are evergreen shrubs and small trees reaching 1.0–10 metres (3–33 ft) tall.
Trochodendron is a genus of flowering plants with one living species, Trochodendron aralioides, and six extinct species known from the fossil record. It was often considered the sole genus in the family Trochodendraceae, though botanists now also include the distinct genus Tetracentron in the family.
Tetracentron is a genus of flowering plant with a sole living species being Tetracentron sinense and several extinct species. It was formerly considered the sole genus in the family Tetracentraceae, though it is now included in the family Trochodendraceae together with the genus Trochodendron.
Chloranthaceae is a family of flowering plants (angiosperms), the only family in the order Chloranthales. It is not closely related to any other family of flowering plants, and is among the early-diverging lineages in the angiosperms. They are woody or weakly woody plants occurring in Southeast Asia, the Pacific, Madagascar, Central and South America, and the West Indies. The family consists of four extant genera, totalling about 77 known species according to Christenhusz and Byng in 2016. Some species are used in traditional medicine. The type genus is Chloranthus. The fossil record of the family, mostly represented by pollen such as Clavatipollenites, extends back to the dawn of the history of flowering plants in the Early Cretaceous, and has been found on all continents.
The Cyrillaceae are a small family of flowering plants in the order Ericales, native to warm temperate to tropical regions of the Americas. The family comprises two genera, Cliftonia and Cyrilla, each containing a single species, Cliftonia monophylla and Cyrilla racemiflora. However, additional species of Cyrilla are now often recognized and the genus is in need of taxonomic revision.
Florissantia is an extinct genus of flowering plants in the Malvaceae subfamily Sterculioideae known from western North America and far eastern Asia. Flower, fruit, and pollen compression fossils have been found in formations ranging from the Early Eocene through to the Early Oligocene periods. The type species is Florissantia speirii and three additional species are known, Florissantia ashwillii, Florissantia quilchenensis, and Florissantia sikhote-alinensis.
Iteaceae is a flowering plant family of trees and shrubs native to the eastern USA, southeastern Africa, and south and Southeastern Asia. Some older taxonomic systems place the genus Itea in the family Grossulariaceae. The APG III system of 2009 includes the former Pterostemonaceae in Iteaceae. Consequently, it now has two genera with a total of 18 known species.
Shepherdia rotundifolia, the roundleaf buffaloberry or silverleaf, is a 3-to-6-foot (1-to-2-meter) evergreen shrub in the oleaster family (Elaeagnaceae) that grows only in the Colorado Plateau (endemic) of the southwestern United States. The common name comes from western settlers using the cooked berries in a sauce for eating cooked buffalo meat.
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