| 词条 | Viola sagittata |
| 释义 |
|image = Viola sagittata.jpg |genus = Viola (plant) |species = sagittata |authority = Aiton |}}Viola sagittata, commonly called the arrowleaf violet,[1] is a species of flowering plant in the violet family (Violaceae). It is native to the eastern North America in Canada and the United States, where it is widespread.[2] It is found in a variety of natural habitats, but is most common in dry, open communities such as prairies, glades, or woodlands, often in sandy or rocky soil.[3][4]Viola sagittata is an stemless perennial. It can be distinguished from other Viola in its area by its leaves that are much longer than wide, with truncate to subcordate bases.[5] It produces purple flowers in the spring.[3] TaxonomyTwo varieties are currently recognized.[4][6] They are quite distinct, which has led some taxonomists to consider them to be distinct species.[7] The varieties are:
References1. ^{{PLANTS|id=POCU4|taxon=Viola sagittata|accessdate=13 July 2018}} 2. ^{{BONAP|ref|genus=Viola|species=sagittata|accessdate=14 July 2018}} 3. ^1 {{Illinois Wildflowers|prairie/plantx/arrow_violet|Arrow-Leaved Violet (Viola sagittata) |html=1}} 4. ^1 {{Tropicos|23|33800477|Viola sagittata |first=Harvey E. |last=Ballard Jr. }} 5. ^{{cite web |url=http://www.herbarium.unc.edu/flora.htm |title= Flora of the Southern and Mid-Atlantic States |first= Alan |last= Weakley |date= 2015}} 6. ^{{eFloras|1|242417475|Viola sagittata |first1= R. John |last1=Little |first2=Landon E. |last2=McKinney |volume=6}} 7. ^{{Michigan Flora |id=2796 |genus=Viola |species=sagittata}} 1 : Viola (plant) |
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