| 词条 | Verbena bracteata |
| 释义 |
|image = Verbena bracteata 9.jpg |genus = Verbena |species = bracteata |authority = Cav. ex Lag. & Rodr. }}Verbena bracteata is a species of verbena known by the common names bracted vervain,[1] bigbract verbena,[2] prostrate vervain, and carpet vervain. It is native to North America where it is widespread, occurring throughout the continent except for northern Canada and southern Mexico. It occurs in many types of habitat, especially disturbed areas, where it grows as a common weed; it typically blooms between the months of May and October.[3] This annual or biennial herb[4] produces several hairy, spreading stems up to 30 centimeters long forming a low mat on the ground. The hairy leaves are toothed or lobed. The inflorescence is a spike of flowers which is dense with long, pointed, leaflike bracts each up to 8 millimeters long. Each small tubular flower is about half a centimeter wide and white to pale purple in color.[5]{{Commons|Verbena bracteata}} References1. ^{{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 |dead-url=yes |df= }} 2. ^{{PLANTS|id=VEBR|taxon=Verbena bracteata|accessdate=6 January 2016}} 3. ^{{cite news|url=http://www.wildflower.org/plants/result.php?id_plant=VEBR|title=Verbena bracteata - Native Plant Database|publisher=wildflower.org|accessdate=2013-12-01|date=2008-05-22}} 4. ^{{cite news|url=http://www.calflora.org/cgi-bin/species_query.cgi?where-taxon=Verbena+bracteata|title=Verbena bracteata: Annual/Biennial|publisher=calflora.org|accessdate=2013-12-01}} 5. ^{{cite news|url=http://www.wildflower.org/plants/result.php?id_plant=VEBR|title=Verbena bracteata - Native Plant Database|publisher=wildflower.org|accessdate=2013-12-01|date=2008-05-22}} External links
2 : Verbena|Flora of North America |
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