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
-
Creating a weed management plan for hemp
Published on April 30, 2020
-
Recent alum educates youth about STEM, plastics, and sustainability
Published on December 7, 2021
-
Spotted lanternfly: A colorful cause for concern
Published on November 12, 2020
-
Processed Industrial Hemp and CBD Products: A Guide on Legality in Michigan
Published on January 13, 2020
-
FAQ on hemp licensing and regulation
Published on January 23, 2020
-
Hemp production resources from Michigan State University
Published on January 23, 2020
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.