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Hypericum perforatum L.
PERFORATE ST JOHNS-WORT
Common St Johnswort; Klamath Weed, Penny-john, Rosin, Rosin-rose, Speckled John, Johns-wort, Herb-john, Amber, Tipton Weed, Goat Weed, Eola Weed; St Johns Wort

Life   Plantae   Dicotyledoneae   Clusiaceae   Hypericum

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Hypericum perforatum, Common St. Johns-wort
© Copyright Sheryl Pollock 2011 · 8
Hypericum perforatum, Common St. Johns-wort
Hypericum perforatum, Common St. Johns-wort
© Copyright Sheryl Pollock 2011 · 7
Hypericum perforatum, Common St. Johns-wort

Hypericum perforatum
© Les Mehrhoff, 2008-2010 · 4
Hypericum perforatum
Hypericum perforatum
© Copyright Bobby Hattaway 2011 · 3
Hypericum perforatum

Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum
Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum

Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum
Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum

Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum
Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum

Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum
Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum

Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum
Hypericum perforatum
© Copyright Malcolm Storey 2011-2115 · 3
Hypericum perforatum

Associates · map
FamilyScientific name @ source (records)
Aphididae  Macrosiphum ( @ AMNH_PBI (1)

Myzus ( @ AMNH_PBI (2)
Apidae  Bombus crotchii @ BMEC_ENT (1)

Bombus fervidus @ BMEC_ENT (1)

Bombus flavifrons @ BBSL (2)

Bombus griseocollis @ CUIC_ENT (1)

Bombus melanopygus @ BBSL (1)

Bombus mixtus @ BBSL (2)

Bombus sitkensis @ BBSL (1)

Bombus vosnesenskii @ BBSL__JPS (1)
Colletidae  Colletes kincaidii @ CUIC_ENT (1)

Hylaeus modestus @ UCMS_ENT (1)
Halictidae  Agapostemon virescens @ I_DBB (1)

Lasioglossum cinctipes @ CUIC_ENT (3)

Lasioglossum foxii @ CUIC_ENT (2)

Lasioglossum perpunctatum @ CUIC_ENT (2)

Lasioglossum truncatum @ CUIC_ENT (1)

Lasioglossum versatum @ UCMS_ENT (1)
Megachilidae  Coelioxys moesta @ CUIC_ENT (1)

Coelioxys rufitarsis @ CUIC_ENT (1)

Osmia bucephala @ BBSL (1)
_  Abstrusomyzus leucocrini @ AMNH_PBI (4)

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ERROR -- Need to remove recursive link: http://pick18.pick.uga.edu/mp/20p%3Fsee%3DI_USID372%26res%3D320 USID_Seeds

Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Hypericum perforatum L. Alien St. John's-wort
Hypericaceae — St. johnís-wort family
Non-native
Hypericum perforatum
Augustine Wildlife Area
June 2002

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
   Top | See original


Hypericum perforatum L. - St. John's Wort

Hypericum perforatum plant

Family - Hypericaceae

Stems - Multiple from base, from thick rhizomes, to +1m tall, dichotomously branching (branches decussate), glabrous, glaucous. Midrib of leaf decurrent on stem and with black glandular punctations.

Leaves - Opposite, decussate, sessile, lance-ovate to oblong or elliptic, entire, to +1.8cm long, +7mm broad, entire, acute to obtuse, glabrous, glaucous (mostly below), with black glandular punctations on margins and a few scattered on the leaf tissue, perforate.

Inflorescence - Terminal bracteate cymes. Pedicels to 2mm long, glabrous (or flowers sessile).

Hypericum perforatum plant

Flowers - Petals (4)5, yellow, spreading, to 1.3mm long, 6mm broad, oblong, obtuse, with black glandular punctations. Stamens many (+50), erect to spreading. Filaments yellow, 7-8mm long, glabrous. Anthers biglobose, .7mm broad. Styles 3, spreading, 6mm long, glabrous, yellow. Ovary superior, glabrous, 3.5mm long, 2.1mm in diameter, ovoid, 3-locular, ovules (seeds) many. Sepals 5, linear, 5-6mm long, 1.1mm broad, acuminate, glabrous, with perforations adjacent and parallel to midrib.

Hypericum perforatum flower

Flowering - May - September.

Habitat - Pastures, fields, waste ground, roadsides, railroads.

Origin - Native to Europe.

Other info. - Feeling depressed? Chew on this. Not! Seriously though, this is the species known commonly as "St. John's Wort", which has recently been over-used as an herbal remedy for the symptoms of depression. Traditionally the plant was used as an antibacterial, an anti-inflammatory, and a host of other ailments. One of the active ingredients, hypericin, causes photodermatitis in some people and animals.
The plant can be identified in the field by the transparent (pellucid) perforations on the leaves and sepals, and the black punctate glands on the leaves and stems. The punctations are not as dense as in H. punctatum Lam. , which has much smaller flowers.

Photographs taken in Pictured Rocks National Seashore, MI., 7-22-02.


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http://plants.usda.gov/java/profile?symbol=HYPE ---> https://plants.usda.gov/java/profile?symbol=HYPE
https://plants.usda.gov/java/profile?symbol=HYPE ---> http://plants.usda.gov/core/profile?symbol=HYPE
http://plants.usda.gov/core/profile?symbol=HYPE ---> https://plants.usda.gov/core/profile?symbol=HYPE
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You are here: Home / Plant Profile

Hypericum perforatum L.
common St. Johnswort

Image of Hypericum perforatum

General Information
Symbol: HYPE
Group: Dicot
Family: Clusiaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : CAN   I
HI   I
L48   I
SPM   I
Fact Sheet (pdf) (doc) Plant Guide (pdf) (doc)
Data Source and Documentation
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Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Hypericum thumbnails at the Plants Gallery

Jennifer Anderson. United States, IA, Scott Co., Princeton, Princeton Marsh. 2002. Usage Requirements .

©Lindsey Koepke. United States, WA, Pierce Co., Mount Rainier National Park, SR123. August 3, 2005. Usage Requirements .

©Jim Stasz. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 2: 533. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .

slideshow

Synonyms

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Dilleniidae
Order Theales
Family Clusiaceae ⁄ Guttiferae – Mangosteen family
Genus Hypericum L. – St. Johnswort
Species Hypericum perforatum L. – common St. Johnswort

Subordinate Taxa

This plant has no children

Legal Status

Noxious Weed Information
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds .
California klamathweed C list (noxious weeds)
Colorado common St. Johnswort C list (noxious weeds)
Montana St. Johnswort Category 1 noxious weed
Nevada Klamath weed Noxious weed
Oregon St.Johnswort, Klamath weed "B" designated weed
South Dakota St. Johnswort Regulated non-native plant species
Washington common St. Johnswort Class C noxious weed
Wyoming common St. Johnswort Noxious weed
U.S. Weed Information
Hypericum perforatum Klamathweed St. John's wort common St. John's wort This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
STATE Assorted authors. State noxious weed lists for 46 states . State agriculture or natural resource departments.
Cal-IPC California Invasive Plant Council. 2006. California Invasive Plant Inventory. Cal-IPC Publication 2006-02 (1 February 2007). California Invasive Plant Council. Berkeley, California.
NE&GP Stubbendieck, J., G.Y. Friisoe,and M.R. Bolick. 1994. Weeds of Nebraska and the Great Plains . Nebraska Department of Agriculture, Bureau of Plant Industry. Lincoln, Nebraska.
SEEPPC Southeast Exotic Pest Plant Council. 1996. Invasive exotic pest plants in Tennessee (19 October 1999). Research Committee of the Tennessee Exotic Pest Plant Council. Tennessee.
SWSS Southern Weed Science Society. 1998. Weeds of the United States and Canada. CD-ROM . Southern Weed Science Society. Champaign, Illinois.
WI Hoffman, R.and K. Kearns (eds.). 1997. Wisconsin manual of control recommendations for ecologically invasive plants . Wisconsin Dept. Natural Resources. Madison, Wisconsin.
WSWS Whitson, T.D. (ed.) et al.. 1996. Weeds of the West . Western Society of Weed Science in cooperation with Cooperative Extension Services, University of Wyoming. Laramie, Wyoming.

Wetland Status

Interpreting Wetland Status

Top Level Regions
Caribbean UPL
Hawaii UPL
North America
Alaska FACU
Arid West FACU
Atlantic and Gulf Coastal Plain FACU
Eastern Mountains and Piedmont FAC
Great Plains UPL
Midwest FACU
Northcentral & Northeast UPL
Western Mountains, Valleys, and Coast FACU

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (HYPE)
CalPhotos (HYPE)
Integrated Taxonomic Information System (HYPE)
Jepson Interchange (University of California - Berkeley) (HYPE)
Native American Ethnobotany (University of Michigan - Dearborn) (HYPE)
USDA Forest Service Fire Effects Information System (HYPE)
University of Tennessee Herbarium (Distribution) (HYPE)
University of Wisconsin - Stevens Point Freckmann Herbarium (HYPE)
Related Websites
British Columbia Ag. & Food, Crop Protection Program (HYPE)
Herbal Information Resources (HYPE)
NV-Extension Weed Wanted Posters (HYPE)
NY-Cornell University: Poisonous Plant Databases (images) (HYPE)
Victoria - Natural Resources & Environment: Landcare Notes (HYPE)
WA-King County Noxious Weeds (HYPE)
WV: Poisonous Plants of the Southern U.S. (HYPE)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover


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Following modified from CalPhotos
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CalPhotos     Photo Database

 

Number of matches : 86
Query: SELECT * FROM img WHERE ready=1 and taxon like "Hypericum perforatum%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0177 3303 3352 0058 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0177 3303 3352 0059 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0072 3301 1163 0119 [detail]
Charles Webber
© 2001 California Academy of Sciences

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 6068 1631 0685 0084 [detail]
© 1995 Saint Mary's College of California

Hypericum perforatum
Hypericum perforatum
Common St. Johnswort
ID: 0000 0000 1003 0111 [detail]
© 2003 Penn Martin II

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0175 3301 2284 0074 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0177 3303 3352 0057 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0175 3301 2284 0072 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0177 3303 3352 0060 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0175 3301 2284 0071 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0175 3301 2284 0073 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0175 3301 2284 0070 [detail]
© 2001 CDFA

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0102 0289 [detail]
© 2001 Julie Kierstead Nelson

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 1104 0374 [detail]
© 2004 Carol W. Witham

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 1104 0726 [detail]
© 2004 Carol W. Witham

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0105 1908 [detail]
© 2005 Louis-M. Landry

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0105 1909 [detail]
© 2005 Louis-M. Landry

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0105 1911 [detail]
© 2005 Louis-M. Landry

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0105 1912 [detail]
© 2005 Louis-M. Landry

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0105 1913 [detail]
© 2005 Louis-M. Landry

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0505 1073 [detail]
© 2005 Luigi Rignanese

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0505 1075 [detail]
© 2005 Luigi Rignanese

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0505 1077 [detail]
© 2005 Luigi Rignanese

Hypericum perforatum
Hypericum perforatum
Klamath Weed
ID: 0000 0000 0505 1338 [detail]
© 2005 Luigi Rignanese

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


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