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Hypericum prolificum L.
Shrubby St. John's-wort
Clusiaceae (Mangosteen Family)
Synonym(s): Hypericum spathulatum
USDA Symbol: HYPR
USDA Native Status: L48 (N), CAN (N)
Shrubby St. Johnís-wort is a small, mound-shaped, deciduous shrub, often to 3 ft. tall, with dense, upright branching and exfoliating, red to purple bark. Smooth, dark- to blue-green, fine-textured foliage becomes yellow-green in fall. Large, yellow flowers occur singly or in few-flowered clusters. A dry, dehiscent, three-valved capsule persists all winter.
This shrub adapts to a variety of moisture regimes and is even flood tolerant. It has no serious disease or insect problems. This species is pH adaptable but does extremely well in calcareous sites.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Retention: Deciduous
Fruit Type: Capsule
Size Notes: Up to about 6 feet tall, often shorter.
Bloom InformationBloom Color: Yellow
Bloom Time: Jun , Jul , Aug , Sep
DistributionUSA: AL , AR , CT , DC , DE , FL , GA , IA , IL , IN , KY , LA , MA , MD , ME , MI , MN , MO , MS , NC , NJ , NY , OH , OK , PA , RI , SC , TN , TX , VA , VT , WI , WV
Canada: ON , QC
Native Distribution: NY to s. MI & IA, s. to GA, LA & OK
Native Habitat: Sandy, open woods; meadows; seepage slopes
Growing ConditionsWater Use: High
Light Requirement: Part Shade , Shade
Soil Moisture: Dry , Moist
Soil pH: Circumneutral (pH 6.8-7.2)
CaCO3 Tolerance: Low
Soil Description: Dry, rocky soils.
BenefitUse Wildlife: Intermediate.
Conspicuous Flowers: yes
PropagationDescription: Seeds can be used for propagation but softwood cuttings, which root easily, are the usual method.
Seed Treatment: Seeds require no special treatment.
Commercially Avail: yes
Mr. Smarty Plants says
Groundcover to reduce erosion for shady area in New York
May 05, 2009
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Evergreen native shrubs for poor drainage area in Cedar Hill, TX
March 21, 2008
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National Wetland Indicator Status
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Mt. Cuba Center - Hockessin, DE
BibliographyBibref 1294 - The Midwestern Native Garden: Native Alternatives to Nonnative Flowers and Plants An Illustrated Guide (2011) Adelman, Charlotte and Schwartz, Bernard L.
Search More Titles in Bibliography
Web ReferenceWebref 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 resourcesUSDA: Find Hypericum prolificum in USDA Plants
FNA: Find Hypericum prolificum in the Flora of North America (if available)
Google: Search Google for Hypericum prolificum
MetadataRecord Modified: 2023-02-14
Research By: TWC Staff