Hypericum japonicum Thunb.

Matted St John's Wort

Fl. Jap. 295, t. 31 (1784) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Prostrate or procumbent, often mat-forming perennial herb, rarely more than c. 8 cm high, rooting from the lower nodes; stems 4-ridged, internodes often shorter than leaves. Leaves elliptic to obovate, 2–10 mm long, 2.5–5 mm wide, spreading from stems, margins not recurved (but often undulate). Flowers solitary and terminal or in reduced cymes; sepals ± equal, elliptic, 1.5–5 mm long, not black-dotted; petals shortly exceeding sepals, yellow, not black-dotted; stamens 10–30, c. half as long as petals, free; styles 3. Capsule ovoid to ellipsoid, plump, slightly shorter than or equal to sepals; seeds ovoid to ellipsoid, 0.7 mm long, smooth or minutely trabeculate. Flowers mainly Oct.–Mar.

CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HFE, HNF, HSF, MonT, NIS, OtP, OtR, SnM, Strz, VAlp, VVP, WaP, WPro, Wim. All States except NT. Eastern Asia, New Guinea, Pacific islands. Occasional in cool, moist, often shaded sites in lowlands, rather common in montane and alpine soaks.

Source: Walsh, N.G. (1996). Clusiaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2019-08-01
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Malpighiales
family Hypericaceae
genus Hypericum
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Hypericum japonicum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Hypericum japonicum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native
Strzelecki Ranges present native
Monaro Tablelands present native
Highlands-Far East present native
Victorian Alps present native
Snowy Mountains present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory