Note that on some devices you will need to manually select Landscape Mode from the print dialog.
Scientific Name: | Hypericum perforatum |
Common Name: | St. John's wort |
Family Name: | Hypericaceae |
Origin: | Africa - northern, Central / west Asia, Europe, S.E. Asia / Japan / China |
Hardiness Zone: | Zone 4: (-34 to -29 °C) |
Plant Type: | Herbaceous perennial, Invasive plant |
Mature Size: | 0.7 - 1.3m x 0.3 - 0.6m (height x width) |
Habit: | Stiffly upright |
Form: | Oval - vertical |
Texture: | Fine |
Landscape Uses: | Medicinal plant |
Exposure: | Full sun |
Soil or Media: | Rocky or gravelly or dry, Well-drained |
Leaves: | Simple, Opposite, Sessile, Soft flexible, Pinnate venation, Glabrous, Lanceolate, Oblanceolate, Oblong, Entire |
Flowers: | Cyme, Yellow, Aug-Sep-Oct |
Fruit: | Capsule, Brown, Sep-Oct |
Key ID Features: | |
Upright, highly branched stems 10-100cm tall; rhizomes; leaves sessile, opposite, lanceolate-oblanceolate, most 1-3cm long x 0.5-1.5cm wide, glabrous, when held up to light small clear dots or perforations can be seen, black marginal dots; corymb-like cyme, flowers ~3cm wide, bight yellow, 5 petals, 8-10mm long, many stamens; capsules 5-8mm long. |