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Yellow Wood Poppy Stylophorum diphyllum

Other Common Name(s):

Phonetic Spelling
sty-loh-FOR-um dy-FIL-um
Description

Yellow Wood Poppy is a rhizomatous herbaceous perennial wildflower in the poppy family that is native to Eastern USA in moist open forests, along streams and ravines. It is not native to NC but should be able to be grown in the mountains and Piedmont areas.

In spring to early summer they produce bright yellow 4-petal flowers that are followed by a bristly blue-green pod that hangs below the leaves.

The plants need moist humus-rich soils in partial to full shade. They will go dormant in summer if allowed to dry out. Use this plant in woodland settings, shady native plant or naturalized areas or along streams and ponds.

 

See this plant in the following landscape:
Shaded Slope
Cultivars / Varieties:
Tags:
#ncemgva2018
 
Cultivars / Varieties:
Tags:
#ncemgva2018
  • Attributes:
    Genus:
    Stylophorum
    Species:
    diphyllum
    Family:
    Papaveraceae
    Uses (Ethnobotany):
    Native Americans used the sap for yellow dye
    Life Cycle:
    Perennial
    Recommended Propagation Strategy:
    Division
    Seed
    Country Or Region Of Origin:
    South Ontario to North Central & Eastern Central U.S.A
    Distribution:
    AL , AR , DC , DE , GA , IL , IN , KY , MD , MI , MO , OH , PA , TN , VA , WV
  • Whole Plant Traits:
    Plant Type:
    Native Plant
    Wildflower
    Habit/Form:
    Spreading
  • Cultural Conditions:
    Light:
    Dappled Sunlight (Shade through upper canopy all day)
    Deep shade (Less than 2 hours to no direct sunlight)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Clay
    High Organic Matter
    Loam (Silt)
    Sand
    Soil pH:
    Acid (<6.0)
    Alkaline (>8.0)
    Neutral (6.0-8.0)
    Soil Drainage:
    Good Drainage
    Moist
    Occasionally Wet
    NC Region:
    Mountains
    Piedmont
    USDA Plant Hardiness Zone:
    4a, 4b, 5a, 5b, 6a, 7a, 7b, 8a, 8b, 9a, 9b
  • Fruit:
    Fruit Color:
    Blue
    Green
    Fruit Type:
    Capsule
    Fruit Length:
    < 1 inch
    Fruit Description:
    1-inch fruits are bristly blue-green pods
  • Flowers:
    Flower Color:
    Gold/Yellow
    Flower Inflorescence:
    Head
    Umbel
    Flower Bloom Time:
    Spring
    Summer
    Flower Petals:
    4-5 petals/rays
    Flower Size:
    1-3 inches
    Flower Description:
    Solitary or a small cluster of 1.5-2" deep yellow flowers at the top of the stem. Has 4 petals, two hairy sepals, many stamens and a single knobby stigma. Blooms April to June.
  • Leaves:
    Leaf Color:
    Blue
    Green
    Leaf Arrangement:
    Opposite
    Leaf Shape:
    Palmasect
    Pinnatifid
    Leaf Margin:
    Lobed
    Hairs Present:
    No
    Leaf Description:
    Usually has a pair of stem leaves and one or more basal blue-green leaves with silvery undersides.
  • Stem:
    Stem Is Aromatic:
    No
    Stem Description:
    Stems have yellow sap
  • Landscape:
    Landscape Location:
    Naturalized Area
    Pond
    Woodland
    Landscape Theme:
    Rain Garden