| 词条 | Hypericum ascyron |
| 释义 |
|image=Hypericum ascyron 0807.JPG |genus=Hypericum |parent=Hypericum sect. Roscyna |species=ascyron |range_map= |taxon= |authority=L.[1] |synonyms_ref = |synonyms = }} Hypericum ascyron, the great St. Johnswort[2] or giant St. John's wort[3] is a wildflower in the genus Hypericum. DescriptionThis large species of Hypericum grows to be 3–5 feet tall. It is perennial and its leaves are a deep green, elliptic, and grow up to five inches long.[4] Its flowers have five petals and it can have thirteen or more stamens.[5][6] TaxonomyAccepted infraspecifics include:[7]
DistributionIt is found Asia and North America, in the latter primarily in the American Midwest, as well as parts of New England and Quebec.[8] It occurs in Russia, Mongolia, Korea, Taiwan, China, Vietnam, Canada, and the United States.[9] References1. ^{{cite web |title=Hypericum ascyron L.|url=http://beta.ipni.org/n/30453546-2|website=ipni.org |publisher=International Plant Names Index|accessdate=2018-09-23}} {{Hypericum species Navbox}}{{Taxonbar|from=Q1041898}}2. ^{{PLANTS|id=HYAS80|taxon=Hypericum ascyron|accessdate=23 November 2015}} 3. ^{{eFloras|1|200014194|Hypericum ascyron|first=Norman K. B. |last=Robson|accessdate=2018-09-23}} 4. ^Missouri Botanical Garden Retrieved November 23, 2015 5. ^Wildflower Center Retrieved November 23, 2015 6. ^[https://gobotany.newenglandwild.org/species/hypericum/ascyron/ GoBotany: New England] Retrieved November 23, 2015 7. ^{{cite web |title=Hypericum ascyron L. |url=http://plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:30453546-2#children |website=Plants of the World Online |publisher=Royal Botanical Gardens Kew |accessdate=2018-09-23}} 8. ^Illinois Flower Info Retrieved November 23, 2015 9. ^{{Cite web |url=http://hypericum.myspecies.info/taxonomy/term/625/descriptions |title=Hypericum ascyron Descriptions |website=hypericum.myspecies.info |accessdate=7 December 2018}} 2 : Hypericum|Flora of North America |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。