*Hypericum perforatum Linnaeus ssp. perforatum . Section: Hypericum. Common name: European St. John’s-wort, Klamath-weed. Phenology: Jun-Sep. Habitat: Fields, pastures, roadsides, woodland borders. Distribution: Native of Eurasia. See Duncan (1985) for documentation for GA.
Origin/Endemic status: Eurasia
Taxonomy Comments: Two other subspecies are recognized for e. Asia and c. Asia.
Synonymy ⓘ: = Can, FNA6, NE, NY, POWO, Robson (2006); = Hypericum perforatum L. — Ar, C, F, G, GrPl, Il, K4, Mi, Mo2, NcTx, NS, NSProv, Pa, RAB, S, S13, Tat, Tn, Va, W, WV, Adams (1973). Basionym: Hypericum perforatum L. 1753
Links to other floras: = Hypericum perforatum ssp. perforatum - FNA6
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FACU
- Eastern Mountains and Piedmont: FAC
- Great Plains: UPL
- Midwest: FACU
- Northcentral & Northeast: UPL
Heliophily ⓘ: 9
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© Erik Danielson source | Original Image ⭷
© Aidan Campos source | Original Image ⭷
© Bruce A. Sorrie | Original Image ⭷
© Bruce A. Sorrie | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Erik Danielson source | Original Image ⭷
© Erik Danielson source | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Joey Shaw source | Original Image ⭷
© Erik Danielson source | Original Image ⭷
© Aidan Campos source | Original Image ⭷
© Erik Danielson source | Original Image ⭷Feedback
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Horticultural Information
Intro: Erect perennial from a woody base, found in fields, pastures, roadsides and woodland borders. Native of Europe.
Stems: Stems tough, much-branched, with ridges leading from leaf bases, smooth.
Leaves: Leaves opposite, sessile with clasping bases, elliptic to linear-oblong, 3/4-1 1/2 in. long, with mostly translucent glandular dots (magnification may be needed).
Inforescence:
Flowers: Flowers many, in branching, sometimes flat-topped, leafy, terminal clusters; bright yellow; 3/4-1 1/4 in. wide; consisting of 5 petals, which may have black spots along the margins, 5 shorter sepals, and an erect cluster of many bushy stamens and styles in the center.
Fruits: Fruit a brown or black, erect, oval capsule with a rough surface.
Comments:
Height: 1- 2 1/2 ft.
plant sale text:
bloom table text:
description: Erect perennial from a woody base, found in fields, pastures, roadsides and woodland borders. Native of Europe.
stems: Stems tough, much-branched, with ridges leading from leaf bases, smooth.
leaves: Leaves opposite, sessile with clasping bases, elliptic to linear-oblong, 3/4-1 1/2 in. long, with mostly translucent glandular dots (magnification may be needed).
inflorescence:
flowers: Flowers many, in branching, sometimes flat-topped, leafy, terminal clusters; bright yellow; 3/4-1 1/4 in. wide; consisting of 5 petals, which may have black spots along the margins, 5 shorter sepals, and an erect cluster of many bushy stamens and styles in the center.
fruits: Fruit a brown or black, erect, oval capsule with a rough surface.
comments:
cultural notes:
germination code:
native range: Europe
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