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

Hypericum perforatum L.
common St. John's-wort (common St. Johnswort)
Hypericaceae (Mangosteen family)
(Previously in Clusiaceae)

Introduction to Vascular Plants

© Gordon Neish  Email the photographer   (Photo ID #46918)

E-Flora BC Static Map
Distribution of Hypericum perforatum
Click here to view the full interactive map and legend
Details about map content are available here
New! Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial herb from a rhizome; stems erect, much branched above, glabrous, 0.1-1.0 m tall.
Leaves:
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.
Flowers:
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.
Fruits:
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

Ecology

Ecological Framework for Hypericum 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

Minimum

Average

Maximum

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
Class
C
Number of field plots
 species was recorded in:
102
Modal BEC Zone Class
IDF
All BEC Zones (# of stations/zone) species was recorded in: CWH(10), ESSF(6), ICH(18), IDF(50), MS(1), PP(6)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References