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Hairy St John's-Wort Hypericum hirsutum 

 
 
Wildlife GardenWildlife garden plant
Attracts BeesBees are attracted to this plant
Attracts ButterfliesButterflies are attracted to this plant
Perennial Life CyclePerennial life cycle
Star-Shaped FlowersStar-shaped flowers
Yellow FlowersYellow flowers
5 Petals5 petals
Jun-Sep Flowering
period
Oval LeavesOval leaves
Hairy-Edged LeavesHairy-edged leaves
Round StemRound stem
Fibrous RootsFibrous roots
100cmMaximum height
 
 
  Main image of Hairy St John's-Wort
© 2021 Adrian Briggs
 

Hairy St John's-Wort is a native perennial plant of the UK, typically found growing in grassland, woodland margins and hedgerows, to a mature height of up to 100cm.

Hairy St John's-Wort, is named to describe the coarse hairiness of its leaves and stems, and its flowering period, which covers St. John's Day (24th June). It is an erect plant, growing up to a metre in height. An identifying characteristic of Hairy St John's-Wort is the presence of numerous, tiny, stalked black glands on the edges of its sepals. These glands contain hypericin, which acts as an insect repellant, to protect the plant from being eaten.

Botanic classification and naming: Hairy St John's-Wort is a member of the St John's-Wort (Hypericaceae) family. The genus name 'Hypericum' identifies the plant as a St John's-Wort and its species name 'hirsutum' means 'hairy plant'.

Benefits: Can be used as a wildlife garden shrub.

Benefits to wildlife are also indicated with orange icons in the plant profile bar at the top.

 

 
Flower of Hairy St John's-Wort

© 2021 Adrian Briggs

 

Flowers:
Hairy St John's-Wort usually flowers between June and September.

Flower colour:

Flower Colour Yellow

Yellow

Flower shape:

Flower Shape  Star

Star

Petals:

Petal Number =  5

5

Leaf of Hairy St John's-Wort

© 2021 Adrian Briggs

 

Leaves:

Leaf Shape:

Leaf Shape is Oval

Oval

Leaf Margins:

Leaf Margin is hairy

hairy

Stem of Hairy St John's-Wort

© 2021 Adrian Briggs

 

Stem and Roots:

Stem shape:

Stem Shape is Round

Round

Root type:

Root Type is Fibrous

Fibrous