Species of flowering plant in the St John's wort family Hypericaceae
Hypericum kouytchense
Scientific classification
Kingdom:
Plantae
Clade:
Tracheophytes
Clade:
Angiosperms
Clade:
Eudicots
Clade:
Rosids
Order:
Malpighiales
Family:
Hypericaceae
Genus:
Hypericum
Section:
H. sect. Ascyreia
Species:
H. kouytchense
Binomial name
Hypericum kouytchense
H.Lév.[1][2]
Hypericum kouytchense, the large-flowered St John's wort, is a species of flowering plant in the family Hypericaceae, native to Western China. Growing up to 3 ft (0.91 m) tall and 5 ft (1.5 m) wide, it is a semi-evergreen rounded shrub with blue-green leaves and large yellow flowers with prominent stamens, appearing in midsummer.[3] Flowers are followed by red seed capsules in autumn. Where conditions are favourable it can retain its leaves all year.
The Latin specific epithet kouytchense is a westernisation of Guizhou,[3] a southwestern province of China identified as a hotspot for biodiversity.
This plant, which is hardy down to −15 °C (5 °F), is cultivated in temperate regions. In the UK it has gained the Royal Horticultural Society's Award of Garden Merit.[4][5]
It has been reported as invasive in Hawaii.[6]
^"Hypericum kouytchense". The Plant List. Retrieved 9 March 2018.
^"Hypericum kouytchense". International Plant Names Index. Retrieved 9 March 2018.
^ ab"Hypericum kouytchense". Missouri Botanical Garden. Retrieved 9 March 2018.
^"RHS Plantfinder - Hypericum kouytchense". Retrieved 9 March 2018.
^"AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 52. Retrieved 9 March 2018.
^"Landscape Plants: Hypericum kouytchense". Oregon State University, College of Agricultural Sciences, Department of Horticulture. Retrieved 9 March 2018.
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