Английская Википедия:Astragalus danicus
Шаблон:Short description Шаблон:Use dmy dates Шаблон:Speciesbox
Astragalus danicus, known as purple milk-vetch,[1] is a species of flowering plant in the family Fabaceae (legumes), which is native to Europe.[2]
Description
Astragalus danicus is a perennial herb. It grows to about Шаблон:Cvt tall with pinnate 3–7 cm compound leaves having 13–27 5-12mm long hairy leaflets. Its flowers are usually in shades of blue and purple, rarely white, Шаблон:Cvt long and clustered in short, compact racemes, looking like a single composite flower. They are followed by dark brown, fruit pods Шаблон:Cvt long, with white hairs.[3] There is some evidence that seeds persist in the soil seed bank, but seed dispersal is poor (generally only 50 cm).[4][5][6]
Habitat and distribution
Astragalus danicus ranges across Europe from Ireland and subarctic Russia south to the Alps and central Ukraine.[2]
It grows on short, unimproved and dry grassland, usually over limestone or chalk, but can also be found on sand dunes, sandstone sea cliffs, machair and over mica-schist. Rarely it has been found on woodland rides and firing ranges. It grows to an altitude of just 710m. It is unable to compete with taller plants and this seems to be the main reason it is not found in habitats with acidic or fertilised soils.[7][4][5]
Ecology
Astragalus danicus flowers provide nectar and are visited by many insects. This species is considered to be mainly pollinated by bees.[8]
In the UK the grasslands where A. danicus is found are predominantly Festuca, Bromopsis and Brachypodium grasslands.[4]
The species is non-toxic and its common name in English comes from the popular belief in history that cows fed with purple milk-vetch yielded more milk.[4]
Conservation
Astragalus danicus has protected status. It is considered endangered by the IUCN.[9] In the United Kingdom it has vulnerable status and has been a Biodiversity Action Plan priority species since 2007.[4]
Astragalus danicus has declined since the start of the enclosure farming system in the 18th century, however declines accelerated in some parts of its range since the 1930s, due to agricultural improvement and in some cases due to land going without grazing (the species can only grow in short vegetation).[7][4]
Herbal medicine
Astragalus danicus has been indicated to have a number of beneficial medicinal effects, particularly in combatting high blood pressure, however health supplements labelled as 'milk-vetch' may contain extracts from a different species in the genus Astragalus.[10] Some other species in the genus Astragalus are known to be toxic to animals and referred to in the US as 'locoweed'.[11]
Etymology
There are a few explanations for the meaning of the genus name Astragalus. Some say it comes from the Ancient Greek 'astragalos' meaning neck vertebra or ankle joint, either because the shape of the flower clusters is similar to a vertebra or because the shape of the seeds is similar to an ankle bone.[12][13] Others say that 'astragalus' is an amalgamation of the Ancient Greek words 'aster' and 'gala' meaning 'star' and 'milk' respectively.[14] The species epithet danicus is Latin for 'Danish', presumably it was first identified in Denmark.[15] The English common name comes from the popular belief in history that cows fed with purple milk-vetch yielded more milk.[4]
References
- ↑ Шаблон:BSBI 2007
- ↑ 2,0 2,1 Ошибка цитирования Неверный тег
<ref>; для сносокFEне указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокStac10не указан текст - ↑ 4,0 4,1 4,2 4,3 4,4 4,5 4,6 BSBI Species Accounts Archive
- ↑ 5,0 5,1 Plant Life International - Species Fact Sheet
- ↑ Шаблон:Cite journal
- ↑ 7,0 7,1 Online Atlas of the British and Irish Flora
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite journal
- ↑ USDA Poisonous Plant Research
- ↑ Merriam Webster Dictionary - Astragalus
- ↑ Flora of Wisconsin
- ↑ Шаблон:Cite book
- ↑ Latin Dictionary - danicus
