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Old Man In the Spring Senecio vulgaris

Previously known as:

  • Jacobaea vulgaris
  • Senecio gaffatensis
  • Senecio semperflorens
  • Senecio taeneriffae
Phonetic Spelling
sen-NEESH-shee-oh vul-GAIR-iss
This plant has medium severity poison characteristics.
See below
Description

Common groundsel a winter annual weed in the Asteraceae (daisy) family, is referred to as a summer annual yet this plant can germinate in spring, summer, or fall. Common groundsel is most common in cool, moist conditions. In milder climates or in overwintering structures, plants can survive outdoors in winter. Plants have distinctive lobed leaves and yellow flowers. Seedlings can flower when less than 2 inches tall but may grow to 18 inches. Seeds are wind-dispersed and have little to no dormancy, thus one can have multiple generations per year. Flowers can mature to produce seeds even after being hand weeded. If possible do not let plants go to seed. With new transplants, inspect liners and pots and eradicate new infestations before they spread. Common groundsel is well controlled by preemergence broadleaf herbicides labeled for use.

Insects, Diseases, and Other Plant Problems: A rust disease has been accidentally introduced from Europe that may impact populations.

 

See this plant in the following landscape:
Cultivars / Varieties:
Tags:
#weed#weedy#winter annual weed#wind dispersed seeds#cool season weed#problem for cats#problem for dogs#problem for horses
 
Cultivars / Varieties:
Tags:
#weed#weedy#winter annual weed#wind dispersed seeds#cool season weed#problem for cats#problem for dogs#problem for horses
  • Attributes:
    Genus:
    Senecio
    Species:
    vulgaris L.
    Family:
    Asteraceae
    Life Cycle:
    Annual
    Recommended Propagation Strategy:
    Seed
    Country Or Region Of Origin:
    Macronesia, Europe, China, Arabian Peninsula, North Africa
    Distribution:
    Senecio vulgaris is found in roadsides, cracks in pavement or edges of walls, in cultivated fields and in sunny gardens, lawns and along edges of yards and other unmanaged places.
  • Whole Plant Traits:
    Plant Type:
    Annual
    Weed
    Growth Rate:
    Rapid
    Texture:
    Fine
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Soil Texture:
    Clay
    Loam (Silt)
    Sand
    Soil pH:
    Acid (<6.0)
    Alkaline (>8.0)
    Neutral (6.0-8.0)
    Soil Drainage:
    Occasionally Dry
    Occasionally Wet
    NC Region:
    Coastal
    Mountains
    Piedmont
  • Flowers:
    Flower Color:
    Gold/Yellow
    Flower Inflorescence:
    Corymb
    Head
    Panicle
    Flower Bloom Time:
    Fall
    Spring
    Summer
    Flower Size:
    < 1 inch
    Flower Description:
    Senscio vulgaris has small, dandelion-like flower heads.
  • Leaves:
    Leaf Color:
    Black
    Green
    Leaf Feel:
    Rough
    Leaf Arrangement:
    Alternate
    Leaf Shape:
    Lanceolate
    Leaf Margin:
    Lobed
    Hairs Present:
    No
    Leaf Length:
    3-6 inches
    Leaf Width:
    1-3 inches
    Leaf Description:
    The alternately arranged leaves have deeply lobed margins, and are irregularly toothed. They may be sparsely hairy, although most are hairless. The upper leaves are directly attached to the stem while the lower leaves have a short petiole. Seedlings have long, narrow cotyledons with smooth margins
  • Stem:
    Stem Is Aromatic:
    No
  • Landscape:
    Problems:
    Problem for Cats
    Problem for Dogs
    Problem for Horses
    Weedy
  • Poisonous to Humans:
    Poison Severity:
    Medium
    Poison Symptoms:
    Chronically delayed toxicity. Some include lethargy, vomiting, central nervous system signs of hepatic failure.
    Poison Toxic Principle:
    .5% up to 1.25% of dry weight of plant.
    Causes Contact Dermatitis:
    No
    Poison Part:
    Flowers
    Leaves
    Roots
    Stems