Kalm's St. John's-Wort (Hypericum kalmianum) | View Observations
Hypericum kalmianum, commonly called Kalm's St. Johns wort or Kalm's St. Johnswort, is a small, yellow-flowering shrub native to the Great Lakes region in the northern United States and southern Canada. It is in the St. John's wort family, Hypericaceae. Hypericum kalmianum was named after its discoverer, Swedish botanist Pehr Kalm (1715-1779).
Other Names: Kalm's St. Johns Wort, Kalm's St. Johnswort
