Library                   Encyclopedia

Plants

  • Alder buckthorn
  • Annual meadow grass
  • Bird cherry
  • Biting stonecrop
  • Common alder
  • Common ash
  • Common bladderwort
  • Common cattail
  • Common hazel
  • Common juniper
  • Common knotgrass
  • Common liverwort
  • Common mallow
  • Common mistletoe
  • Common nettle
  • Common polypody
  • Common raspberry
  • Common reed
  • Common sweet flag
  • Cornelian cherry
  • Creeping buttercup
  • Creeping thistle
  • Creeping woodsorrel
  • Daisy
  • Dandelion
  • Dog rose
  • English oak
  • European larch
  • European spindle
  • European white water lily
  • Field bindweed
  • Field horsetail
  • Field maple
  • Germander speedwell
  • Greater celandine
  • Greater plantain
  • Hairy finger-grass
  • Hart's-tongue fern
  • Hawthorn
  • Hornbeam
  • Horse chestnut
  • Ivy-leaved toadflax
  • Lesser duckweed
  • Lily of the Valley
  • Maidenhair spleenwort
  • Male fern
  • Norway spruce
  • Peat moss
  • Perforate St. John's wort
  • Red clover
  • Ribwort plantain
  • Round-leaved sundew
  • Rowan
  • Scots pine
  • Shepherd's-purse
  • Silver birch
  • Small-leaved lime
  • Sweet violet
  • White poplar
  • White willow
  • Wild strawberry
  • Wych elm
  • Yarrow
741 illustration
741 photo 01

Perforate St. John's wort

Hypericum perforatum

Description:
Perforate St. John's Wort is a perennial herbaceous plant. It has a branched stem with two ribs and can grow to a height of 30 to 60 centimetres. It has opposing, stalkless, narrow leaves that appear to have many tiny holes through them, although these are actually colourless glands. The star-shaped flowers are bright yellow, peppered with tiny black dots. The fruit is a three-winged capsule containing multiple seeds. The stems exude a blood-red juice.

Habitat:
St. John's wort blooms from June to August, and its fruit ripens in September. It grows in meadows, woodland and waste ground and can be found in many countries throughout the world.

  • Illustration
  • Photos
  • Video