| 词条 | Hypericum formosissimum |
| 释义 |
|image=Hypericum formosissimum.jpg |parent=Hypericum sect. Adenosepalum |genus=Hypericum |species=formosissimum |authority=Takht. 1940 |synonyms=
}} Hypericum formosissimum is a flowering plant in the genus Hypericum, in the section Adenosepalum, in the Hypericum huber-morathii group. TaxonomyHypericum formosissimum was first described in Zametki Sist. Geogr. Rast. (Notes on Systematics and Geography of Plants) in 1940 by Armen Takhtajan.[3] The species was actually omitted by error from Norman Robson's comprehensive monograph of the genus Hypericum in 1981 but was later accepted as a valid species of the genus.[4] The species is an extreme development of Adenosepalum and is confined to limestone rocks, a behavior shared with the other members of the huber-morathii group.[5]DescriptionHypericum formosissimum is a perennial herb that grows {{Cvt|3-10|cm|in}} tall. It is glabrous (lacks hairs) and has numerous stems that are straggling and almost grow along the ground. The stems are slender, terete, brittle, and lack glands. The internodes are {{Cvt|3-8|mm|in}} long, and most grow longer than the leaves. The leaves are {{Cvt|2-3|mm|in}} and are petiolate (with stems).They have {{Cvt|3-8|mm|in}} long lamina which are broadly ovate or almost circular and are a bluish-green color. The leaves have 2 lateral pairs of veins that ascend from the lower portion of the midrib and are difficult to see. The glands on the leaves are pale and dense and the intramarginal glands are black and spaced out. The species is 1-5 flowered from terminal nodes without any flowering branches below. The pedicels that hold the flowers are {{Cvt|1-2|mm|in}}long. The bracts are small and are black and denticulate. The flowers are {{Cvt|10-12|mm|in}} wide with rounded buds. The petals are a pale yellow and are 8 by 5 millimeters in size. The stamens number around 18-20, with the longest being around {{Cvt|5-6|mm|in}} long. The seeds are brown and approximately {{Cvt|1-3|mm|in}} long with linear-foveolate testa.[5]The species flowers from June-July and fruits from July-August.[7] Distribution and habitatThe species is native to Turkey in central Anatolia as well as the Transcaucasus region, especially in Armenia and Azerbaijan. It is found in fissures of limestone rocks at elevations of {{Cvt|1450-1900|m|ft}} above sea level.[5] EcologyH. formosissimum is an endangered species that occupies an area of less than 500 square kilometers. It was included in the Red Data Book of Armenia as a Rare Species (Category 2).[7]ChemistryUnlike other species in sect. Adenosepalum, H. formosissimum does not contain hypericin and pseudohypericin, but only pseudohypericin. The species contains about 0.05% content pseudohypericin.[11] References1. ^1 {{Cite web|url=https://www.gbif.org/species/3712606|title=Hypericum formosissimum Takht.|website=www.gbif.org|language=en|access-date=2018-11-20}} Plants of the World Online {{!}} Kew Science|website=Plants of the World Online|access-date=2018-11-18}}[1][2][3][4][5][6]2. ^1 {{Cite book|url=http://www.ipni.org/ipni/idPlantNameSearch.do?id=428449-1|title=Clusiaceae Hypericum formosissimum Takht.|volume=9|website=www.ipni.org|access-date=2018-11-20}} 3. ^1 {{Cite journal|last=Crockett|first=Sara L.|last2=Robson|first2=Norman K. B.|date=2011|title=Taxonomy and Chemotaxonomy of the Genus Hypericum|journal=Med Aromat Plant Sci Biotechnol.|volume=5|issue=1|pages=1–13|pmc=3364714|pmid=22662019}} 4. ^1 2 3 {{Cite web|url=http://hypericum.myspecies.info/taxonomy/term/977|title=Nomenclature {{!}} Hypericum online|website=hypericum.myspecies.info|language=en|access-date=2018-11-18}} 5. ^1 2 {{Cite book|url=http://www.mnp.am/red_book_fauna/eng/p330.html|title=Red Data Book of Armenia|last=Takhtajan|first=A.L.|last2=Avetisyan|first2=V.E|publisher=|year=1989|isbn=|location=USSR|pages=}} 6. ^1 {{Cite journal|last=Kitanov|first=Gerassim M|date=2001|title=Hypericin and pseudohypericin in some Hypericum species|journal=Biochemical Systematics and Ecology|volume=29|issue=2|pages=171–178|doi=10.1016/s0305-1978(00)00032-6|pmid=11106845|issn=0305-1978}} }}{{Hypericum species Navbox}}{{Taxonbar|from=Q17565782}} 3 : Hypericum|Flora of Asia|Plants described in 1940 |
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