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Native Plant Database

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Hypericum kalmianum (Kalm's st. johnswort)
Bransford, W.D. and Dolphia

Hypericum kalmianum L.

Kalm's St. Johnswort

Clusiaceae (St. John's-Wort Family)

USDA Symbol: hyka

USDA Native Status: Native to U.S.

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.

 

From the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Shrub
Flower:
Fruit: Brown

Bloom Information

Bloom Color: Yellow
Bloom Time: Jul , Aug

Distribution

USA: 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.
USDA Native Status: L48(N), CAN(N)

Growing Conditions

Light Requirement: Sun
Soil Moisture: Dry
Soil Description: Sandy loam

Benefit

Conspicuous 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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Recommended Species Lists

Find native plant species by state. Each list contains commercially available species suitable for gardens and planned landscapes. Once you have selected a collection, you can browse the collection or search within it using the combination search.

View Recommended Species page

Additional resources

USDA: Find Hypericum kalmianum in USDA Plants
FNA: Find Hypericum kalmianum in the Flora of North America (if available)
Google: Search Google for Hypericum kalmianum

Metadata

Record Modified: 2007-01-01
Research By: TWC Staff

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