| 词条 | Kalmia angustifolia |
| 释义 |
|name = Sheep-laurel |image = Kalmia angustifolia Rubra.jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Ericales |familia = Ericaceae |genus = Kalmia |species = K. angustifolia |binomial = Kalmia angustifolia |binomial_authority = L. }} Kalmia angustifolia is a flowering shrub in the family Ericaceae, commonly known as sheep laurel. It is distributed in eastern North America from Ontario and Quebec south to Virginia. It grows commonly in dry habitats in the boreal forest, and may become dominant over large areas after fire or logging.[1] Like many plant species of infertile habitats it has evergreen leaves and mycorrhizal associations with fungi.[2] It is also found in drier area of peat bogs. DescriptionThe attractive small, deep crimson-pink flowers are produced in early summer. Each has five sepals, with a corolla of five fused petals, and ten stamens fused to the corolla. They are pollinated by bumble bees and solitary bees. Each mature capsule contains about 180 seeds.[3] In the wild the plant may vary in height from {{convert|15|-|90|cm|0|abbr=on}}. New shoots arise from dormant buds on buried rhizomes. This process is stimulated by fire.[3] The narrow evergreen leaves, pale on the underside, have a tendency to emerge from the stem in groups of three. The Latin specific epithet angustifolia means "narrow-leaved".[4] A peculiarity of the plant is that clusters of leaves usually terminate the woody stem, for the flowers grow in whorls or in clusters below the stem apex.[5] Numerous cultivars have been selected for garden use, of which K. angustifolia f. rubra,[6] with rich red flowers, has gained the Royal Horticultural Society's Award of Garden Merit.[7] ToxicityKalmia contains a glycoside, known as andromedotoxin.[8] It is poisonous to mammals. Hence, it can be unwelcome in pastures.[9] Several of its folk-names testify to the plant's toxicity: 'lamb-kill', 'sheep kill', 'calf-kill', 'pig laurel', 'sheep-laurel' and 'sheep-poison'.[10] It is also known as narrow-leaved laurel and dwarf laurel.[10]References1. ^Weetman, G. F. 1983. Forestry practices and stress on Canadian forest land. pp. 260–301. In W. Simpson-Lewis, R. McKechnie, and V. Neimanis (eds.) Stress on Land in Canada. Ottawa: Lands Directorate, Environment Canada. {{Taxonbar|from=Q3192236}}2. ^Keddy, P.A. 2007. [https://www.amazon.ca/Plants-Vegetation-Origins-Processes-Consequences/dp/0521864801 Plants and Vegetation: Origins, Processes, Consequences].Cambridge University Press, Cambridge, UK. 666 p. 3. ^1 Hall, I. V., Jackson, L. P. and Everett, C. F. 1973. The biology of Canadian weeds. 1. Kalmia angustifolia L. Canadian Journal of Plant Science 53: 865–873. 4. ^{{cite book |last=Harrison |first=Lorraine |title=RHS Latin for Gardeners |year=2012 |publisher=Mitchell Beazley |location=United Kingdom |isbn=184533731X}} 5. ^Blanchan, Neltje. 1917. Wild Flowers Worth Knowing Doubleday, New York.Project Gutenberg Literary Archive Foundation 6. ^{{cite web|title=RHS Plant Selector - Kalmia angustifolia f. rubra|url=http://apps.rhs.org.uk/plantselector/plant?plantid=1088|publisher=Royal Horticultural Society|accessdate=20 May 2013}} 7. ^{{cite web | url= https://www.rhs.org.uk/plants/pdfs/agm-lists/agm-ornamentals.pdf | title = AGM Plants - Ornamental | date = July 2017 | page = 57 | publisher = Royal Horticultural Society | accessdate = 14 March 2018}} 8. ^{{Cite web|url=https://plants.ces.ncsu.edu/plants/all/kalmia-angustifolia-k-carolina/|title=Kalmia angustifolia, K. carolina|website=plants.ces.ncsu.edu|access-date=2019-02-01}} 9. ^{{Cite web|url=https://www.fs.fed.us/database/feis/plants/shrub/kalang/all.html|title=Kalmia angustifolia|website=www.fs.fed.us|access-date=2019-02-01}} 10. ^1 {{GRIN | accessdate = 24 December 2017}} 9 : Kalmia|Flora of the Northeastern United States|Flora of the Southeastern United States|Flora of the Great Lakes region (North America)|Flora of Eastern Canada|Flora of Saint Pierre and Miquelon|Flora of the Appalachian Mountains|Plants described in 1753|Taxa named by Carl Linnaeus |
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