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Thickhead Crassocephalum crepidioides

Other Common Name(s):

Description

Thickhead, in the Asteraceae family, is a recently introduced summer annual that is very similar to the more common American burnweed (Erechtites hieraciifolius (L.)). Seedlings form a rosette of elliptic leaves with toothed margins; midveins are often tinged red. Compared to American burnweed, seedling leaves are thicker and more deeply veined. As plants mature they grow upright to about 4 feet with toothed leaves clasping the stem. Thickhead flowers lack petals but are red in color. Additionally, thickhead flowers droop downward as though the plants were experiencing moisture stress. Seeds are wind-dispersed and can produce multiple generations each growing season. Thickhead is managed by most broad-spectrum herbicides; however, herbicide efficacy rankings for this species are based on limited experimental data.

Cultivars / Varieties:
Tags:
#weed
 
Cultivars / Varieties:
Tags:
#weed
  • Attributes:
    Genus:
    Crassocephalum
    Species:
    crepidioides
    Life Cycle:
    Annual
    Recommended Propagation Strategy:
    Seed
  • Whole Plant Traits:
    Plant Type:
    Annual
    Weed
  • Flowers:
    Flower Color:
    Gold/Yellow
  • Leaves:
    Leaf Color:
    Gold/Yellow
    Green
    Hairs Present:
    No
  • Stem:
    Stem Is Aromatic:
    No
  • Landscape:
    Problems:
    Weedy