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Hypericum calycinum

Common Name(s):

Phonetic Spelling
hy-PER-ih-kum ka-lee-SIN-um
Description

Excellent for extreme slopes or sandy soils; spreads by underground stems; moderate drought tolerance. Prefers fertile, loamy well-drained acidic soil

Family name Hypericaceae (Guttifereae)

Quick ID Hints:

  • Stems 2-4 ridged on newer growth
  • Leaves paired or whorled, sessile or short-stalked
  • 5-petaled yellow flowers with numerous stamen

Deciduous or evergreen shrub, small tree or herb.

There are around 400 species of Hypericum, which include herbs, shrubs and trees, with different bloom times and cultural requirements. 

H. calycinum: herbaceous shrub-like species to 0.5 m with 4-angled stems; evergreen (unless stressed), 2-4" ovate-oblong, acute leaves; and large 5-petaled, 5-sepaled yellow flowers with numerous, erect stamens that give a powder-puff appearance; summer bloom time; used as groundcover.

See this plant in the following landscape:
Cultivars / Varieties:
  • 'Brigadoon'
'Brigadoon'
Tags:
#evergreen#drought tolerant#low growing#purple leaves#yellow flowers#slopes#spreading#groundcover#fantz#sandy soils tolerant
 
Cultivars / Varieties:
  • 'Brigadoon'
'Brigadoon'
Tags:
#evergreen#drought tolerant#low growing#purple leaves#yellow flowers#slopes#spreading#groundcover#fantz#sandy soils tolerant
  • Attributes:
    Genus:
    Hypericum
    Species:
    calycinum
    Family:
    Hypericaceae
  • Whole Plant Traits:
    Plant Type:
    Ground Cover
    Woody Plant Leaf Characteristics:
    Broadleaf Evergreen
    Habit/Form:
    Spreading
    Growth Rate:
    Rapid
    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:
    Loam (Silt)
    Soil pH:
    Acid (<6.0)
    USDA Plant Hardiness Zone:
    6a, 6b, 7b, 7a, 8a, 8b, 9a, 9b, 10b, 10a
  • Fruit:
    Fruit Type:
    Capsule
    Fruit Description:
    A (2)3-5 celled capsule, sometimes fleshy.
  • Flowers:
    Flower Color:
    Gold/Yellow
    Flower Inflorescence:
    Cyme
    Flower Bloom Time:
    Spring
    Summer
    Flower Description:
    Single 3 inch yellow flowers. Solitary or cymose, terminal or axillary. Yellow (usually) 5-petaled (rarely 4), 5 sepals (rarely 4); stamens numerous, in bundles or in showy boss;
  • Leaves:
    Woody Plant Leaf Characteristics:
    Broadleaf Evergreen
    Leaf Color:
    Blue
    Green
    Purple/Lavender
    Leaf Type:
    Simple
    Leaf Arrangement:
    Opposite
    Whorled
    Leaf Margin:
    Entire
    Hairs Present:
    No
    Leaf Length:
    3-6 inches
    Leaf Description:
    3-4 inches long medium to dark green leaves; bluish green below; purplish fall color. Opposite or whorled, decussate, simple, entire; sessile or petiole short.
  • Stem:
    Stem Is Aromatic:
    No
    Stem Description:
    Contain 2 to 4(up to 6) ridges on newer growth, smooth and rounded on older growth.
  • Landscape:
    Landscape Location:
    Slope/Bank