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Hypericum
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  Hypericum hypericoides ssp. hypericoides http://plants.usda.gov/java/profile?symbol=HYHYH
St. Andrew's Cross.
  Common St. Johnswort: Hypericum perforatum http://www.ppws.vt.edu/scott/weed_id/hyppe.htm
Photographs of this plant, its flowers and leaves.
  Hypericum perforatum http://plants.usda.gov/java/profile?symbol=HYPE
Photo and profile of common St. Johnswort, with particular focus on its status as a noxious weed in parts of the U.S.
  Hypericum perforatum http://www.hypericum.com/hyp09.htm
Description of Common St. Johnswort.
  Hypericum crux-andreae http://plants.usda.gov/java/profile?symbol=HYCR3
St. Peterswort.
  Hypericum tetrapterum http://www.plant-identification.co.uk/skye/guttiferae/hypericum-tetrapterum.html
Several photographs of Square-stemmed St John’s Wort and some identifying features of the plant.
  Hypericum androsaemum http://www.plant-identification.co.uk/skye/guttiferae/hypericum-androsaemum.html
Several photographs of Tutsan and some identifying features of the plant.
  Hypericum pulchrum http://www.plant-identification.co.uk/skye/guttiferae/hypericum-pulchrum.htm
Several photographs of leaves and flowers of slender St John’s Wort and its description.
  Hypericum humifusum http://www.plant-identification.co.uk/skye/guttiferae/hypericum-humifusum.html
Photograph of Trailing St John’s Wort and a description of the plant.
  Hypericum tetrapterum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2121
Photographs, diagnostic features, habitat and distribution of square-stalked St John’s-wort.
  Hypericum humifusum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2122
Photographs, diagnostic features, habitat and distribution of trailing St John’s-wort.
  Hypericum linariifolium http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2123
Photographs, diagnostic features, habitat and distribution of toadflax-leaved St John’s-wort.
  Hypericum pulchrum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2124
Photographs, diagnostic features, habitat and distribution of slender St John’s-wort.
  Hypericum nummularium http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2125
Photographs, diagnostic features, habitat and distribution of round-leaved St John’s-wort.
  Hypericum hirsutum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2126
Photographs, diagnostic features, habitat and distribution of hairy St John’s-wort.
  Hypericum montanum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2127
Photographs, diagnostic features, habitat and distribution of pale St John’s-wort.
  Hypericum elodes http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2128
Photographs, diagnostic features, habitat and distribution of marsh St John’s-wort.
  Hypericum canadense http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2129
Photographs, diagnostic features, habitat and distribution of Irish St John’s-wort.
  Diversity, Distribution and Indigenous Uses of the Hypericum Species http://www.ethnoleaflets.com//leaflets/hyperic2.htm
Ethnobotanical leaflet on the uses made of these valuable medicinal plants in the Himalayan region on India.
  Hypericum undulatum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2120
Photographs, diagnostic features, habitat and distribution of wavy St John’s-wort.
  Hypericum maculatum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2117
Photographs, diagnostic features, habitat and distribution of imperforate St John’s-wort and its subspecies.
  Hypericum perforatum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2115
Photographs, diagnostic features, habitat and distribution of perforate St John’s-wort.
  Hypericum xylosteifolium http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2114
Photographs, diagnostic features, habitat and distribution of Turkish Tutsan.
  Hypericum hircinum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2113
Photographs, diagnostic features, habitat and distribution of stinking tutsan.
  Hypericum inodorum x http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2112
Photographs, diagnostic features, habitat and distribution of tall tutsan.
  Hypericum androsaemum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2111
Photographs, diagnostic features, habitat and distribution of tutsan.
  Hypericum forrestii http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2110
Photographs, diagnostic features, habitat and distribution of Forrest’s Tutsan.
  Hypericum pseudohenryi http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2109
Photographs, diagnostic features, habitat and distribution of Irish Tutsan.
  Hypericum calycinum http://ip30.eti.uva.nl/bis/flora.php?selected=beschrijving&menuentry=soorten&id=2108
Photographs, diagnostic features, habitat and distribution of Rose-of-Sharon.
  Hypericum calycinum http://www.botany.hawaii.edu/faculty/carr/images/hyp_cal.jpg

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