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Chelidonium majus is often confused with:
Ranunculus Ranunculus
Plants that fill a similar niche:
Tanacetum vulgare Tanacetum vulgare
Laburnum anagyroides Laburnum anagyroides
Ludwigia Ludwigia habit

St. John's Wort Chelidonium majus

Other Common Name(s):

Phonetic Spelling
kel-ih-DOH-nee-um MAY-jus
This plant has high severity poison characteristics.
See below
Description

This pretty yellow flower likes to gets its feet into moist soil but not overly wet soil. Flowers appear in May and June, bringing a burst of yellow color in the first months of summer.  Find it in the landscape in flower gardens as cultivated herbaceous perennial or naturally as a weed in disturbed areas, it naturalizes in the mountains

While Chelidonium majus is part of the poppy family, and its 4 parted showy yellow flowers can be mistaken for buttercups or Ranunculus.  This biennial herb has a orange-yellow cell sap and a brittle stem. 

 

 

Cultivars / Varieties:
Tags:
#gold#yellow#poisonous#early summer#weed#yellow flowers#weedy#grows fast#spreading#curved leaves#Celandine#St. Johns Wort#June#mountains#May#buttercups
 
Cultivars / Varieties:
Tags:
#gold#yellow#poisonous#early summer#weed#yellow flowers#weedy#grows fast#spreading#curved leaves#Celandine#St. Johns Wort#June#mountains#May#buttercups
  • Attributes:
    Genus:
    Chelidonium
    Species:
    majus
    Family:
    Papaveraceae
    Life Cycle:
    Biennial
    Country Or Region Of Origin:
    Eurasia
  • Whole Plant Traits:
    Plant Type:
    Herbaceous Perennial
    Poisonous
    Weed
    Growth Rate:
    Rapid
  • Fruit:
    Fruit Type:
    Capsule
    Fruit Description:
    fruit a slender capsule
  • Flowers:
    Flower Color:
    Gold/Yellow
    Flower Bloom Time:
    Summer
    Flower Petals:
    4-5 petals/rays
    Flower Description:
    Flowers are yellow and 4-parted.
  • Leaves:
    Leaf Color:
    Green
    Leaf Type:
    Compound (Pinnately , Bipinnately, Palmately)
    Leaf Margin:
    Lobed
    Hairs Present:
    No
    Leaf Description:
    Leaves are pinnately divided and have veins that are easily seen since the veins are a lighter color. The leaflets are lobed.
  • Stem:
    Stem Color:
    Green
    Stem Is Aromatic:
    No
    Stem Description:
    brittle with yellow-orange sap
  • Landscape:
    Problems:
    Poisonous to Humans
    Weedy
  • Poisonous to Humans:
    Poison Severity:
    High
    Poison Symptoms:
    HIGHLY TOXIC, MAY BE FATAL IF EATEN! Nausea, vomiting, bloody diarrhea, numbness, fainting, and coma.
    Poison Toxic Principle:
    Isoquinoline alkaloids
    Causes Contact Dermatitis:
    No
    Poison Part:
    Roots