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Rumex
The docks and sorrels, genus ''Rumex'', are a genus of about 200 species of annual, biennial, and perennial herbs in the buckwheat family, Polygonaceae. Members of this genus are very common perennial herbs with a native almost worldwide distribution, and introduced species growing in the few places where the genus is not native. Some are nuisance weeds (and are sometimes called dockweed or dock weed), but some are grown for their edible leaves. ''Rumex'' species are used as food plants by the larvae of a number of Lepidoptera species, and are the only host plants of '' Lycaena dispar'' and '' Lycaena rubidus.'' Description They are erect plants, usually with long taproots. The fleshy to leathery leaves form a basal rosette at the root. The basal leaves may be different from those near the inflorescence. They may or may not have stipules. Minor leaf veins occur. The leaf blade margins are entire or crenate. The usually inconspicuous flowers are carried above the leaves in clus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rumex Acetosa
Sorrel (''Rumex acetosa''), also called common sorrel or garden sorrel, is a perennial herbaceous plant in the family Polygonaceae. Other names for sorrel include spinach dock and narrow-leaved dock ("dock" being a common name for the genus ''Rumex''). Sorrel is native to Eurasia and a common plant in grassland habitats. It is often cultivated as a leaf vegetable or herb. Description Sorrel is a slender herbaceous perennial plant about high, with roots that run deep into the ground, as well as juicy stems and arrow-shaped ( sagittate) leaves which grow from a rosette. The lower leaves are in length with long petioles and a membranous ocrea formed of fused, sheathing stipules. The upper leaves are sessile, (growing directly from the stem without a petiole) and frequently become crimson. It has whorled spikes of reddish-green flowers, which bloom in early summer, becoming purplish. The species is dioecious, with stamens and pistils on different plants. Subspecies Several ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rumex Abyssinicus
''Rumex abyssinicus'' is a species of flowering plant in the family Polygonaceae The Polygonaceae are a Family (biology), family of flowering plants known Common name, informally as the knotweed family or smartweed—buckwheat family in the United States. The Botanical name, name is Basionym, based on the genus ''Polygonum'', ..., native to tropical Africa, including Madagascar. Taxonomy ''Rumex abyssinicus'' was first described by Nikolaus von Jacquin in 1777. ''R. arifolius'' L.f. is a synonym of this species. (''R. arifolius'' All. is a different species, regarded as either a synonym of '' R. hispanicus'', or of '' R. alpestris''.) References External links * * * abyssinicus Flora of Africa Plants described in 1777 {{Polygonaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rumex Acetosella
''Rumex acetosella'', commonly known as red sorrel, sheep's sorrel, field sorrel and sour weed, is a species of flowering plant in the buckwheat family Polygonaceae. Native to Eurasia including the British Isles, the plant and its subspecies are common perennial weeds. It has green arrowhead-shaped leaves and red-tinted deeply ridged stems, and it sprouts from an aggressive and spreading rhizome. The flowers emerge from a tall, upright stem. Female flowers are maroon in color. Description ''Rumex acetosella'' is a perennial herb which spreads via rhizomes. It has a slender and reddish, upright stem that is branched at the top, reaching a height of . The arrow-shaped leaves are small, about long and wide, with pointed lobes at the base. It blooms during March to November, when yellowish-green (male) or reddish (female) flowers develop on separate plants at the apex of the stem, which develop into the red fruits (achenes). It should not be confused with the similarly named ''R. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycaena Dispar
The large copper (''Lycaena dispar'') is a butterfly of the family Lycaenidae. ''L. dispar'' has been commonly arranged into three subspecies: ''L. dispar dispar'', (single-brooded) which was commonly found in England, but is now extinct, ''L. d. batavus'', (single-brooded) can be found in the Netherlands and has unsuccessfully been reintroduced into the United Kingdom, and lastly, ''L. d. rutilus'', (double-brooded) which is widespread across central and southern Europe. The latter has been declining in many European countries, due to habitat loss. Currently ''L. dispar'' is in severe decline in northwest Europe, but expanding in central and northern Europe. Description From Seitz C. dispar Haw. (76). Very variable in size, many specimens [of ''dispar dispar''] being smaller than large ''rutilus'' [now subspecies] ; differs from the latter in the larger spots of the underside, especially in the female. In the male an additional black spot appears frequently, but not always, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rumex Patientia
''Rumex patientia'', known as patience dock, garden patience, herb patience, or monk's rhubarb, is a herbaceous perennial flowering plant belonging to the family (biology), family Polygonaceae. In spring it is often consumed as a leaf vegetable and as a filling in pies in Southern Europe, especially in Bulgaria, North Macedonia, Bosnia and Herzegovina and Serbia. It is also used in Romania in Spring soup, spring broths or sarmale. Uses The leaves can be eaten raw or cooked, but do contain oxalic acid, so should not be eaten in excess (e.g. every day). The leaves can be used raw in salads, cooked in soups and stews, or layered in baked dishes like lasagna. The leaves are high in minerals, and can be harvested at any time. Gallery Image:Rumex patseeds.jpg, Seeds File:Rumex patientia MHNT.BOT.2015.34.63.jpg, ''Rumex patientia'' - MHNT References External links * * * * Rumex, patientia Flora of Southeastern Europe Plants described in 1753 Taxa named by Carl Linnaeus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polygonaceae
The Polygonaceae are a Family (biology), family of flowering plants known Common name, informally as the knotweed family or smartweed—buckwheat family in the United States. The Botanical name, name is Basionym, based on the genus ''Polygonum'', and was first used by Antoine Laurent de Jussieu in 1789 in his book, ''Genera Plantarum''.Antoine Laurent de Jussieu. 1789. ''Genera plantarum: secundum ordines naturales disposita, juxta methodum in Horto regio parisiensi exaratam''. page 82. Herrisant and Barrois: Paris, France. (see ''External links'' below) The name may refer to the many swollen Node (botany), nodes the stems of some species have, being Etymology, derived from Greek language, Greek ( meaning and meaning or ). Alternatively, it may have a different origin, meaning 'many seeds'. The Polygonaceae comprise about 1200 speciesDavid J. Mabberley. 2008. ''Mabberley's Plant-Book'' third edition (2008). Cambridge University Press: UK. distributed into about 48 genera. The l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polygonoideae
Polygonoideae is a subfamily of plants in the family Polygonaceae. It includes a number of plants that can be highly invasive, such as Japanese knotweed, '' Reynoutria japonica'', and its hybrid with '' R. sachalinensis'', ''R.'' × ''bohemica''. Boundaries between the genera placed in the subfamily and their relationships have long been problematic, but a series of molecular phylogenetic studies have clarified some of them, resulting in the division of the subfamily into seven tribes. Taxonomy Phylogeny A 2015 molecular phylogenetic study suggested that the genera and tribes in Polygonoideae were related as shown in the following cladogram. ''Rumex'' included ''Emex'', and '' Fallopia'' was not monophyletic, with some species placed outside the main group in the tribe Polygoneae, and some others grouping with '' Pteroxygonum'', placed in the tribe Pteroxygoneae. Genera Some of the boundaries between the genera are not settled ; in particular, '' Fallopia'' is at least paraph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rheum (plant)
''Rheum'' is a genus of about 60 herbaceous perennial plants in the family Polygonaceae. Species are native to eastern Europe, southern and eastern temperate Asia, with a few reaching into northern tropical Asia. ''Rheum'' species are cultivated in Europe, Asia, and North America. The genus includes the vegetable rhubarb. The species have large somewhat triangular shaped leaves with long, fleshy Petiole (botany), petioles. The flowers are small, greenish-white to rose-red, and grouped in large compound leafy inflorescences. Many rhubarb cultivars have been domesticated as medicinal plants and for human consumption. While the leaves are slightly toxic, the stalks are used in pies and other foods for their tart flavour. Description ''Rheum'' species are herbaceous perennials growing from fleshy roots. They have upright growing stems and mostly basal, deciduous leaves growing from short, thick rhizomes. They have persistent or deciduous ocrea. The inflorescences are terminal and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxyria
Oxyria is a genus of plants in the family Polygonaceae with three accepted species . It has a circumboreal distribution. Description Species of ''Oxyria'' are perennial herbaceous plants or weakly shrubby. They may have rhizomes. Their stems are erect, variably branched. Undivided leaves are present both at the base of the plant and on the stems. They are arranged alternately and have stalks ( petioles). The ocrea is tubular and membranous. The inflorescences are terminal, paniclelike or racemelike, borne on stems ( pedunculate). Individual flowers are either bisexual or unisexual, with four greenish to reddish brown tepals. The fruits are in the form of achenes with broadly winged margins. Taxonomy The genus was first described by John Hill in 1765. It is placed in the subfamily Polygonoideae, tribe Rumiceae, along with ''Rheum'' and ''Rumex''. It is sister to the clade formed by the other two genera. Species , Plants of the World Online Plants of the World Online (POW ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weed
A weed is a plant considered undesirable in a particular situation, growing where it conflicts with human preferences, needs, or goals.Harlan, J. R., & deWet, J. M. (1965). Some thoughts about weeds. ''Economic botany'', ''19''(1), 16-24. Plants with characteristics that make them hazardous, aesthetically unappealing, difficult to control in managed environments, or otherwise unwanted in agriculture, farm land, Orchard, orchards, gardens, lawns, Park, parks, recreational spaces, residential and industrial areas, may all be considered weeds.Holzner, W., & Numata, M. (Eds.). (2013). ''Biology and ecology of weeds'' (Vol. 2). Springer Science & Business Media. The concept of weeds is particularly significant in agriculture, where the presence of weeds in fields used to grow crops may cause major losses in yields. Invasive species, plants introduced to an environment where their presence negatively impacts the overall functioning and biodiversity of the ecosystem, may also sometime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
