Common St. Johnswort – Hypericum perforatum
Print
EmailHypericum perforatum L.
Clusiaceae (St. Johnswort family)
MI Status
Non-native
Life cycle
Multistemmed, shrublike perennial.
Leaves
Opposite, narrow oval to oblong leaves have round to pointed tips and entire margins, and attach directly to the stem. Leaves are covered with small, transparent dots when viewed against the light.
Stems
Erect with numerous branches and up to 3 feet tall. Herbaceous stems are often reddish in color and become woody at the base with maturity.
Flowers and fruit
Bright yellow to orange-yellow flowers with five petals are approximately 0.75 inch wide, often with several black dots along the petal margins. Fruit are capsules with three cells containing numerous dark brown to black, cylinder-shaped seeds.
Reproduction
Seeds and short runners.
Other Documents in this Series
You Might Also Be Interested In
-
MSU named Top 10 agriculture and forestry college in new report
Published on March 23, 2021
-
MSU research team receives USDA grant to evaluate effectiveness, cost of new blueberry pest management strategies
Published on February 19, 2021
-
Student-led bird banding innovation spearheads continuation of data collection despite COVID-19
Published on March 16, 2021
-
Creating innovative models to assess spread, possible management of deadly chronic wasting disease
Published on February 1, 2021
-
Improving the health of Michigan’s fishes
Published on February 1, 2021
-
New trail makes nature more accessible at the MSU Corey Marsh Ecological Research Center
Published on August 25, 2021
Accessibility Questions:
For questions about accessibility and/or if you need additional accommodations for a specific document, please send an email to ANR Communications & Marketing at anrcommunications@anr.msu.edu.