Hypericum kalmianum L.
Kalm's St. John's-wort
Clusiaceae (St. John's-Wort Family)
USDA Symbol: hyka
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.
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Bloom InformationBloom Color: Yellow
Bloom Time: Jul , Aug
DistributionUSA: DC , IL , IN , MI , NY , OH , 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
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National Wetland Indicator Status
Additional resourcesUSDA: Find Hypericum kalmianum in USDA Plants
FNA: Find Hypericum kalmianum in the Flora of North America (if available)
Google: Search Google for Hypericum kalmianum
MetadataRecord Modified: 2007-01-01
Research By: TWC Staff