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Bransford, W.D. and Dolphia
Hypericum kalmianum L.
Kalm's St. Johnswort
Clusiaceae (St. John's-Wort Family)
USDA Symbol: hyka
USDA Native Status: L48 (N), CAN (N)
A low shrub with bright yellow flowers in small clusters at ends of 4-sided branches; bark papery, peeling when older.
The species and common names honor Peter Kalm, a student of Linnaeus, who discovered the plant in America around 1750. This is one of several shrubby St.-Johns-worts with yellow flowers and small axillary clusters of leaves. Many species of St.-Johns-wort are found throughout the South.
Plant CharacteristicsDuration: Perennial Habit: Shrub Flower:
Bloom InformationBloom Color: Yellow
Bloom Time: Jul , Aug
, WI Canada: ON
, QC Native Distribution:
Ontario and Quebec south to New York, Ohio, Indiana, Illinois, and Wisconsin. Native Habitat:
Rocky or sandy soil.
Growing ConditionsLight Requirement: Sun
Soil Moisture: Dry
Soil Description: Sandy loam
BenefitConspicuous Flowers: yes
Mr. Smarty Plants says
Evergreen shrubs for Michigan
June 17, 2008
I'm seeking a small-medium, ornamental, fairly compact, evergreen shrub to complement my front yard woodland wildflower garden. I want a shrub that will flank both sides of my front porch steps. I wa...
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National Wetland Indicator Status
|Status:|| FACW || FACW |
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
Record Last Modified: 2007-01-01
Research By: TWC Staff