Hypericum kouytchense

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Malpighiales

Familia: Hypericaceae
Genus: Hypericum
Sectio: H. sect. Ascyreia
Species: Hypericum kouytchense
Name

Hypericum kouytchense H.Lév.
Synonyms

Norysca kouytchensis (H.Lév.) Y.Kimura

References

Bulletin de la Société d'Agriculture, Sciences et Arts de la Sarthe 59: 322 (1904).
Flora of China: Hypericum kouytchense

Vernacular names
English: Large-flowered St John's-wort
中文: 贵州金丝桃

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]
References

"Hypericum kouytchense". The Plant List. Retrieved 9 March 2018.
"Hypericum kouytchense". International Plant Names Index. Retrieved 9 March 2018.
"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.