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Common Name: Threadleaf Groundsel

Other Names: Woolly Groundsel, Threadleaf Ragwort

Species Name: Senecio flaccidus

Plant Type: Forb

Family Name: Asteraceae, Sunflower Family



Plant Facts  
Origin Native
Duration Perennial
Distribution in the U.S. South Central; Kansas and Colorado to Texas and Arizona
Distribution in Oklahoma Tip of Panhandle and far southwestern corner



ID Characteristics

  • Field Identification Characteristics


    • Leaves and stems covered in fuzzy white hairs
    • Narrow, lobed leaves
    • Stems branching from thick shaggy root


    • Flowers yellow with noticeable head underneath ray petals
  • Leaf and Stem Characteristics
    • Leaf Type: Simple
    • Leaf Arrangement: Alternate
    • Leaf Shape: Pinnately lobed; filiform lobes
    • Stipules: Absent
  • Floral Characteristics
    • Petal Number: 8-13
    • Flower Color: Yellow
    • Flower Timing: June-August
    • Fruit Type: Achene



Soil Type Sandy and rocky soil
Habitat Dry rocky plains, deserts and pinyon-juniper rangeland
Successional Stage Early


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