| 词条 | Bistorta affinis |
| 释义 |
| image = Polygonum affine2.jpg | image_caption = | taxon = Bistorta affinis | authority = (D. Don) Greene | synonyms = |Persicaria affinis|(D.Don) Ronse Decr. |Polygonum affine|D.Don | synonyms_ref = [1] }} Bistorta affinis (synonyms Polygonum affine, Persicaria affinis), the Himalayan bistort,[2] fleece flower, or knotweed, is a species of flowering plant in the family Polygonaceae, native to the Himalayas (Tibet, Nepal, northern India, Pakistan, Kashmir). DescriptionBistorta affinis is a creeping, densely tufted, mat-forming perennial, growing to {{convert|25|cm|0|abbr=on}} tall by {{convert|60|cm|0|abbr=on}} broad. The narrow elliptic leaves are white on the underside because of a waxy coating. Leaves are mostly at the base, 3–8 cm long, with the base narrowed to a short stalk. Leaf margins are entire or very finely toothed. The mid-vein is prominent. Cylindrical spikes of many pale pink or rose-red flowers are borne at the top of short erect stems, from midsummer to autumn. Flower-spikes are {{convert|5|-|7.5|cm|0|abbr=on}} long, with densely crowded flowers. Stamens protrude slightly out of the flowers. Flowering stems are several, 5–25 cm tall, with very few smaller leaves. When the flowers have died, they tend to persist on the plant into winter.[3][4]HabitatBistorta affinis is found in the Himalayas, from Afghanistan to eastern Nepal, at altitudes of {{convert|3000|-|4800|m|ft|0|abbr=on}}.[5]CultivationBistorta affinis is used ornamentally as groundcover.[6] The following cultivars have gained the Royal Horticultural Society's Award of Garden Merit:[7]
References1. ^{{cite web |title=Bistorta affinis (D.Don) Greene |work=Plants of the World Online |publisher=Royal Botanic Gardens, Kew|url=http://www.plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:693182-1 |accessdate=2019-03-01 }} {{Taxonbar|from1=Q10428456|from2=Q7170299|from3=Q32858528}}2. ^{{cite web |title=BSBI List 2007 |publisher=Botanical Society of Britain and Ireland |url=http://www.bsbi.org.uk/BSBIList2007.xls |format=xls |archive-url=https://www.webcitation.org/6VqJ46atN?url=http://www.bsbi.org.uk/BSBIList2007.xls |archive-date=2015-01-25 |accessdate=2014-10-17 |deadurl=yes |df= }} 3. ^{{cite book|title=RHS A-Z encyclopedia of garden plants|year=2008|publisher=Dorling Kindersley|location=United Kingdom|isbn=1405332964|page=1136}} 4. ^Flora of China, Polygonum affine D. Don, 1825. 密穗拳参 mi sui quan shen 5. ^{{cite web|title=Kew Gardens - Plants & fungi - Persicaria affinis|url=http://www.kew.org/plants-fungi/Persicaria-affinis.htm|accessdate=25 May 2013}} 6. ^{{cite book | author=Pink, A. | url=http://www.gutenberg.org/etext/11892|title=Gardening for the Million| year=2004 | publisher=Project Gutenberg Literary Archive Foundation}} 7. ^{{cite web | url = https://www.rhs.org.uk/plants/pdfs/agm-lists/agm-ornamentals.pdf | title = AGM Plants - Ornamental | date = July 2017 | page = 75 | publisher = Royal Horticultural Society | accessdate = 22 April 2018}} 8. ^{{cite web|title=RHS Plant Selector - Persicaria affinis 'Darjeeling Red'|url=http://apps.rhs.org.uk/plantselector/plant?plantid=5727|accessdate=25 May 2013}} 9. ^{{cite web|title=RHS Plant Selector - Persicaria affinis 'Donald Lowndes'|url=http://apps.rhs.org.uk/plantselector/plant?plantid=3788|accessdate=25 May 2013}} 10. ^{{cite web|title=RHS Plant Selector - Persicaria affinis 'Superba'|url=http://apps.rhs.org.uk/plantselector/plant?plantid=1412|accessdate=25 May 2013}} 10 : Bistorta|Flora of West Himalaya|Flora of Jammu and Kashmir|Flora of Nepal|Flora of Pakistan|Flora of Tibet|Plants described in 1825|Garden plants of Asia|Groundcovers|Perennial plants |
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