E-Flora BC: Electronic Atlas of the Flora of British Columbia

Hypericum perforatum L. subsp. perforatum
common St. John's-wort

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Hypericum perforatum subsp. perforatum
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Species Information

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Perennial herb from a rhizome; stems erect, much branched above, glabrous, 0.1-1.0 m tall.
Stem leaves lanceolate or oblanceolate, unstalked, obtuse, 1-3 cm long, 0.5-1.5 mm wide, glabrous with translucent glandular dots throughout and black marginal dots.
Inflorescence up to 100+ flowered; petals yellow, 8-10 mm long; sepals linear-lanceolate to lanceolate, abruptly sharp-pointed, 4-6 mm long; stamens 75-100, united basally into 3 groups; styles 3.
Membranous capsules, 5-8 mm long; seeds dark brownish, 1.0-1.3 mm long, pitted in longitudinal rows.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry fields, roadsides and disturbed areas in the lowland, steppe and montane zones; infrequent in SW and WC BC, frequent in SC BC; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Hypericum perforatum ssp. perforatum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 35 787 2289
Slope Gradient (%) 0 28 210
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
30 190 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: CWH(10), ESSF(6), ICH(18), IDF(50), MS(1), PP(6)

Synonyms and Alternate Names

Hypericum perforatum L.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References