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.
Habit:
Stiffly upright
Form:
Oval - vertical
Texture:
Fine
Mature Height:
0.7 - 1.3m
Mature 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:
Leaf Morphology:
Form:
Simple
Arrangement:
Opposite
Texture/Venation:
Surfaces:
Colour in Fall:
Yellow
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)
