Senecio sylvaticus - Woodland groundsel

Asteraceae


Woodland groundsel is an annual that reproduces by seed. It is common in the Willamette Valley (Oregon). I've seen this plant on several occasions in container crops.

It looks very similar to common groundsel (Senecio vulgaris), however foliage on this plant is far more pubescent and is gray in color.

Foliage is pinnately lobed, glaucous (bluish gray in color), and pubescent.

Habit is more upright than common groundsel. Plants grow erect up to 3 feet tall.

Foliage is alternately arranged.

Plants flower in late summer. With most plants I've observed, foliage has senesced by the time plants begin flowering.

Flower heads are cigar shaped with yellow disc flowers only. Flowers appear similar to those of common groundsel, however, common groundsel flowers have a distinct black tipped involucre. The involucre of this weed has a faint brown tip, if noticeable at all.

Flowers are yellow tubular disk flowers. There are no ray flowers.

Seedheads of pure white pappus occur as half-spheres.


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