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Hypericum prolificum

Previously known as:

  • Hypericum spathulatum
Phonetic Spelling
hy-PER-ih-kum pro-LIF-ih-kum
This plant has medium severity poison characteristics.
See below
Description

Shrubby St. John's Wort is a herbaceous, perennial, deciduous or evergreen flowering shrub with a compact, dense habit, dark green leaves, and yellow flowers. It is one of around 400 species of Hypericum, which include herbs, shrubs, and trees, with different bloom times and cultural requirements.  In nature, it is often found in open woods, bogs, hedge banks and grassland, dry sunny places, and usually on calcareous soils. The genus name comes from the Greek words hyper meaning above and eikon meaning picture in reference to the practice of hanging flowers from this genus above images, pictures or windows. The specific epithet means many or prolific in reference to the many stamens.

Shrubby St. John's Wort will grow in a range of soils from sandy to clay and, while it prefers to stay moist, it will tolerate dry soils. The plant will grow in full sun or partial shade, but full sun will maximize blooms. It is a slow grower and will tolerate drought. It can spread, the root pattern is rhizomatous with underground stems sending roots and shoots along their length, but can be kept under control with spring pruning.

Diseases, Insect Pests, and Other Plant Problems:

No known diseases or insect pests. However, root rot and wilt can be significant problems in hot and humid climates.

See this plant in the following landscape:
Cultivars / Varieties:
Tags:
#deciduous#drought tolerant#wildlife plant#yellow flowers#mounding#pollinator plant#fantz#food source fall#food source herbage#food source nectar#food source pollen#Coastal FAC#bird friendly#food source hard mast fruit#mammals#Piedmont Mountains FACU#bee friendly#Audubon
 
Cultivars / Varieties:
Tags:
#deciduous#drought tolerant#wildlife plant#yellow flowers#mounding#pollinator plant#fantz#food source fall#food source herbage#food source nectar#food source pollen#Coastal FAC#bird friendly#food source hard mast fruit#mammals#Piedmont Mountains FACU#bee friendly#Audubon
  • Attributes:
    Genus:
    Hypericum
    Species:
    prolificum
    Family:
    Hypericaceae
    Life Cycle:
    Perennial
    Recommended Propagation Strategy:
    Division
    Seed
    Country Or Region Of Origin:
    Central and Eastern North America
    Wildlife Value:
    Fruits attract birds.
    Particularly Resistant To (Insects/Diseases/Other Problems):
    Heat, drought, and soil compaction tolerant.
    Edibility:
    Ingesting St John's wort can reduce the effectiveness of some prescription medicines.
    Dimensions:
    Height: 1 ft. 0 in. - 5 ft. 0 in.
    Width: 1 ft. 0 in. - 4 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Native Plant
    Shrub
    Wildflower
    Woody Plant Leaf Characteristics:
    Deciduous
    Habit/Form:
    Dense
    Erect
    Mounding
    Multi-stemmed
    Rounded
    Growth Rate:
    Slow
    Maintenance:
    Low
    Texture:
    Medium
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Clay
    Loam (Silt)
    Sand
    Soil pH:
    Acid (<6.0)
    Alkaline (>8.0)
    Neutral (6.0-8.0)
    Soil Drainage:
    Good Drainage
    Moist
    Occasionally Dry
    NC Region:
    Coastal
    Mountains
    Piedmont
    USDA Plant Hardiness Zone:
    3b, 3a, 4a, 4b, 5b, 5a, 6b, 6a, 7b, 7a, 8b, 8a
  • Fruit:
    Fruit Color:
    Brown/Copper
    Display/Harvest Time:
    Fall
    Fruit Type:
    Capsule
    Fruit Length:
    < 1 inch
    Fruit Width:
    < 1 inch
    Fruit Description:
    A (2)3-5 celled ovoid 1/2 inch capsule, sometimes fleshy. Displays from July to November.
  • Flowers:
    Flower Color:
    Gold/Yellow
    Flower Inflorescence:
    Cyme
    Flower Value To Gardener:
    Long Bloom Season
    Showy
    Flower Bloom Time:
    Summer
    Flower Petals:
    4-5 petals/rays
    Flower Size:
    < 1 inch
    Flower Description:
    Bright yellow flowers in summer on current season's growth; dry capsules persist all winter. Solitary or cymose, terminal or axillary. Yellow (usually) 5-petaled (rarely 4), 5 sepals (rarely 4); stamens numerous, in bundles or in showy boss. Blooms from June to October. 5-petaled flowers with numerous stamens. The upper stems terminate in small clusters of 3-7 flowers; additional clusters of flowers may appear along the 2 upper pairs of opposite leaves. Each flower is ¾ to 1 inch across. The petals are much larger than the sepals.
  • Leaves:
    Woody Plant Leaf Characteristics:
    Deciduous
    Leaf Color:
    Green
    Leaf Type:
    Simple
    Leaf Arrangement:
    Opposite
    Whorled
    Leaf Shape:
    Elliptical
    Linear
    Oblong
    Leaf Margin:
    Entire
    Hairs Present:
    No
    Leaf Length:
    1-3 inches
    Leaf Width:
    < 1 inch
    Leaf Description:
    Dark green 3 inch leaves with no appreciable fall color. Opposite or whorled, decussate, simple, entire; sessile or petiole short.
  • Bark:
    Bark Color:
    Light Brown
    Surface/Attachment:
    Exfoliating
    Bark Description:
    Older bark is exfoliating.
  • Stem:
    Stem Color:
    Brown/Copper
    Green
    Stem Is Aromatic:
    No
    Stem Description:
    Contains 2 to 4(up to 6) ridges on newer growth, smooth and rounded on older growth. The lower stems are woody with shredded gray-brown bark, while the upper stems are green and slightly winged on opposite sides.
  • Landscape:
    Landscape Location:
    Meadow
    Naturalized Area
    Woodland
    Landscape Theme:
    Butterfly Garden
    Native Garden
    Pollinator Garden
    Design Feature:
    Accent
    Border
    Attracts:
    Butterflies
    Pollinators
    Small Mammals
    Songbirds
    Resistance To Challenges:
    Drought
    Dry Soil
    Erosion
  • Poisonous to Humans:
    Poison Severity:
    Medium
    Poison Symptoms:
    Skin contact with the sap, or ingestion of the plant, can cause photosensitivity in some people. Common side-effects are gastointestinal disturbances, allergic reactions and fatigue.
    Poison Toxic Principle:
    Unidentified, possibly a glycoside
    Causes Contact Dermatitis:
    Yes
    Poison Part:
    Leaves
    Sap/Juice