Hypericum kouytchense

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.

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]

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]

References

1. "Hypericum kouytchense". The Plant List. Retrieved 9 March 2018.
2. "Hypericum kouytchense". International Plant Names Index. Retrieved 9 March 2018.
3. "Hypericum kouytchense". Missouri Botanical Garden. Retrieved 9 March 2018.
4. "RHS Plantfinder - Hypericum kouytchense". Retrieved 9 March 2018.
5. "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 52. Retrieved 9 March 2018.
6. "Landscape Plants: Hypericum kouytchense". Oregon State University, College of Agricultural Sciences, Department of Horticulture. Retrieved 9 March 2018.

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