Details of...
Scientific Name: Hypericum perforatum
Pronunciation: hy-PEER-ih-kum per-for-AY-tum
Common Name: St. John's wort
Family Name: Hypericaceae
Plant Type: Weed (horticultural)
Key ID Features: Leaves opposite on tall upright stems, when held up to light small clear dots or perforations can be seen.
Course(s): not used (on campus)

Habit: Stiffly upright
Form: Oval - vertical
Texture: Fine
Mature Size:
Height:0.7 - 1.3m
Spread:0.3 - 0.6m
Growth Rate:Fast
Origin: Africa, Europe
Hardiness Rating: Zone 4: (-34 to -29 C)
Exposure: Full sun
Soil/ Growing Medium: Rocky or gravelly or dry, Well-drained
Water Use: Low
Landscape Uses: Medicinal plant
Additional Info: Google
St. John's wort
Leaf Morphology: Glossary
Form: Simple
Arrangement: Opposite
Texture/ Venation:
Colour in Fall: Yellow
Leaf(let) Terms:
Shapes: Elliptic, Ovate
Apices: Obtuse, Rounded
Bases: Cuneate
Margins: Entire

Inflorescence Type: Cyme
Flower Morphology:Flowers perfect
Number of Petals:5
Corolla Shape:Rotate/stellate
Ovary Position:Superior
Colour (petals): Showy, Yellow
Flower Scent: None
Flower Time at Peak: Aug, Sep, Oct

Fruit Type: Capsule
Fruit Colour: Brown
Fruiting Time: Sep, Oct

Bark or Stem Colour:
Organ Modifications: Rhizomes

Propagation: Seed, Division - below ground parts
Pest Susceptibility: Anthracnose, Thrips, ( Pest resistant, Disease resistant, Deer resistant, Rabbit resistant )
(GAZN) GAZebo North
(WDY) WeeDY location
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