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Hypericum kalmianum
Hypericum kalmianum L.
Kalm's St. John's-wort
Clusiaceae (Mangosteen Family)
Synonym(s):
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. John's-worts with yellow flowers and small axillary clusters of leaves. Many species of St. John's-wort are found throughout the South.
Plant Characteristics
Duration: PerennialHabit: Shrub
Fruit Type: Capsule
Size Notes: Up to about 3 feet tall.
Fruit: Brown
Bloom Information
Bloom Color: YellowBloom Time: Jul , Aug
Distribution
USA: DC , IL , IN , MI , NY , OH , WICanada: ON , QC
Native Distribution: Ontario and Quebec south to New York, Ohio, Indiana, Illinois, and Wisconsin.
Native Habitat: Rocky or sandy soil.
Growing Conditions
Light Requirement: SunSoil Moisture: Dry
Soil Description: Sandy loam
Benefit
Conspicuous Flowers: yesMr. 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
Region: | AGCP | AK | AW | CB | EMP | GP | HI | MW | NCNE | WMVE |
Status: | FACW | FACW |
Web Reference
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resources
USDA: Find Hypericum kalmianum in USDA PlantsFNA: Find Hypericum kalmianum in the Flora of North America (if available)
Google: Search Google for Hypericum kalmianum
Metadata
Record Modified: 2023-03-21Research By: TWC Staff