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Thalictrum flavum

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Thalictrum flavum, known by the common names common meadow-rue,<ref name=Readers/><ref name=BSBI07>Template:Cite web</ref> and yellow meadow-rue,<ref name=skou>Peder Skou Template:Google books</ref> is a flowering plant species in the family Ranunculaceae. It is a native to Caucasus and Russia (Siberia). Growing to Template:Convert tall by Template:Convert broad, it is an herbaceous perennial producing clusters of fluffy yellow fragrant flowers in summer.

Description

Thalictrum flavum has fibrous roots,<ref name=Gray>Samuel F. Gray Template:Google books</ref> and has wedge-shaped,<ref name="Irish"/> dark green leaves, with a paler green underneath, they are divided into multiple sections.<ref name=Readers>Template:Cite book</ref> It blooms between June and August.<ref name=Readers/> The flowers are composed of short sepals and longer, erect stamens.<ref name=RHSAZ>Template:Cite book</ref><ref>The Wild Flower Key British Isles - N W Europe, by Francis Rose, 1991, Template:ISBN</ref> The sepals are actually white, but the multiple erect, yellow stamens, give the flower a yellow appearance.<ref name="Irish"/> Later, three fruits are formed from each flower head.<ref name=Readers/>

Phytochemistry

The plant contains an enzyme called pavine N-methyltransferase, which modifies a variety of benzylisoquinoline alkaloids including the eponymous alkaloid pavine.<ref>Template:Cite journal</ref> Benzylisoquinoline alkaloids like pavine often have a variety of pharmacological actions, and as a result some have medical uses such as analgesic or anticancer effects while others have significant toxicity. T. flavum also contains another benzylisoquinoline alkaloid, thalidezine, which is also present in other Thalictrum species.<ref>S.W. Pelletier (Editor) Template:Google books</ref>

Taxonomy

It was first described and published by Carl Linnaeus, in his book 'Species Plantarum', on page 546 in 1753.<ref name="plantlist"/><ref>Template:Cite web</ref> The specific epithet flavum means "pure yellow".<ref name=RHSLG>Template:Cite book</ref>

The subspecies T. flavum subsp. glaucum has gained the Royal Horticultural Society's Award of Garden Merit.<ref>Template:Cite web</ref>

The common name 'meadow rue' is thought to have derived from 'meadow rhubarb'.<ref name=Readers/>

It is written as 黄唐松草 in Chinese script and known as huang tang song cao in Pidgin in China.<ref name=efloras>Template:Cite web</ref>

It was verified by United States Department of Agriculture and the Agricultural Research Service on 24 January 1997.<ref name="grin"/>

Distribution and habitat

It is very widespread, and is native to temperate regions of Asia, Northern Africa and Europe.<ref name="grin">Template:Cite web</ref>

Range

It is found in Northern Africa within Algeria. In Europe, it is found in (Eastern Europe) Belarus, Estonia, Latvia, Lithuania, Ukraine, (Middle Europe), Austria; Czech Republic, Germany, Hungary, Poland, Slovakia, Switzerland, (northern Europe) Denmark, Finland, Ireland, Norway, Sweden, United Kingdom, (southeastern Europe) Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Italy, Macedonia, Montenegro, Romania, Serbia, (southwestern Europe) France and Spain. In Asia, it is found in the Caucasus, (within Azerbaijan and Georgia) Russian Federation, (within Amur and Primorye), China, (Xinjiang,<ref name=efloras/>) Kazakhstan, Siberia and Turkey.<ref name="grin"/>

the plant has three web shaped lobed leafletes which are dark green

It has naturalised in the UK, and found in southern and western England, as well as in Scotland and Ireland.<ref name=Readers/><ref name="Irish"/>

Habitat

It is found generally in grasslands,<ref>John G. Kelcey and Norbert Müller (Editors) Template:Google books</ref> marshy fields, fens and riverbanks.<ref name=Gray/><ref name="Irish">Template:Cite web</ref>

Ecology

It is pollinated mainly by flies and bees, with wind dispersal of the seeds.<ref name=Readers/> The larva of the Perizoma sagittata (Marsh Carpet moth) are found on the plant, eating the seeds and the flowers.<ref name=skou/>

Uses

Medicinal

It has been used in folk medicine in the UK, the foliage has been used a purgative.<ref name=Readers/>

References

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External links

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Other sources

  • Aldén, B., S. Ryman, & M. Hjertson Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource on www.skud.info). 2012 (Kulturvaxtdatabas)
  • Botanical Society of the British Isles BSBI taxon database (on-line resource). (BSBI)
  • Chinese Academy of Sciences Flora reipublicae popularis sinicae. 1959- (F China)
  • Davis, P. H., ed. Flora of Turkey and the east Aegean islands. 1965-1988 (F Turk)
  • Euro+Med Editorial Committee Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). (EuroMed Plantbase)
  • Greuter, W. et al., eds. Med-Checklist. 1984- (L Medit)
  • Huxley, A., ed. The new Royal Horticultural Society dictionary of gardening. 1992 (Dict Gard)
  • Jalas, J. & J. Suominen Atlas florae europaeae. 1972- (Atlas Eur)
  • Komarov, V. L. et al., eds. Flora SSSR. 1934-1964 (F USSR)

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