Family: Hypericaceae
Kalm's St. John's-wort
Robert Bierman
Christopher Noll
University of Wisconsin-Stevens Point, Robert W. Freckmann Herbarium (UWSP)
Etymology: Hypericum: ancient Greek name derived from hyper, "above," and eikon, "picture," from old practice of placing flowers above an image in the house to ward off evil spirits at the midsummer festival of Walpurgisnacht, which later became feast of St. John
Plants: erect, perennial, 6"-40" tall shrub, with many branches
Leaves: often curling backward
Flowers: yellow, 5-parted, 3/4"-1 1/4" wide; inflorescence of 3-7 stalked flowers in a branched cluster (cyme) at the ends of the branches; blooms July-Aug.
Fruits: capsule, thin oval
Habitat: moist; dunes, shores; in rocky, sandy soil
Conservation Status: Native
Plants: erect, perennial, 6"-40" tall shrub, with many branches
Leaves: often curling backward
Flowers: yellow, 5-parted, 3/4"-1 1/4" wide; inflorescence of 3-7 stalked flowers in a branched cluster (cyme) at the ends of the branches; blooms July-Aug.
Fruits: capsule, thin oval
Habitat: moist; dunes, shores; in rocky, sandy soil
Conservation Status: Native
Floristic Rating: Coefficient of Conservatism = 9, Wetland Indicator = FACW- USDA Plants Database: Federal Distribution and detailed information including photos University of Wisconsin - Green Bay: Shrubs: Photos, descriptions, information Landscape Plants of the Upper Midwest; UW-Extension: Interactive guide providing information on cultivation including: soil, zone, growth rate, landscape uses, pruning, light requirements; with photos and Latin name pronounciation
Christopher Noll
Emmet J. Judziewicz
Robert R. Kowal
Aaron_Carlson
