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

Hypericum perforatum L.
common St. John's-wort (common St. Johnswort)
Clusiaceae

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #73097)

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Distribution of Hypericum perforatum
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SUBTAXA PRESENT IN BC
Hypericum perforatum ssp. perforatum

Species Information

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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


Genetic information (NCBI Taxonomy Database)
 International Plant Names Index
 Taxonomic Information from the World Flora Online
 Integrated Taxonomic Information System

Additional Photo Sources

Images From CalPhoto
UT Austin's Native Plant Database
 Google Image Search
 Flickr Image Search

General References

Google Scholar Search
Family References
 General Botanical References for BC
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2024-11-25 12:11:00 AM ]
Disclaimer: The information contained in the E-Flora atlas pages is derived from expert sources as cited in each section. This information is scientifically based. E-Flora also acts as a portal to other sites via deep links. As always, users should refer to the original sources for complete information. E-Flora BC is not responsible for the accuracy or completeness of the original information.
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