[Butterweeds & Groundsels: The Genera Packera and Senecio in Mt. Adams Country]

Tansy Ragweed, Tansy Ragwort

Jacobaea vulgaris

Synonym: Senecio jacobaea

Flower head of Tansy Ragweed, Tansy Ragwort: Jacobaea vulgaris (Synonym: Senecio jacobaea)

The photo above shows a close-up of one flower head of tansy ragweed as seen along forest road #23 at the Mt. Adams viewpoint about one-half mile south of road #8810.........August 6, 2005.

Leaf of Tansy Ragweed, Tansy Ragwort: Jacobaea vulgaris (Synonym: Senecio jacobaea)

The photo above shows a close-up of a stem leaf of tansy ragweed as seen along forest road #23 at the Mt. Adams viewpoint about one-half mile south of road #8810...........August 6, 2005.

Tansy Ragweed, Tansy Ragwort: Jacobaea vulgaris (Synonym: Senecio jacobaea)

The photo above shows tansy ragweed as seen along forest road #23 at the Mt. Adams viewpoint about one-half mile south of road #8810.........August 6, 2005. Also in view is the white oxeye daisy (Leucanthemum vulgare).

Inflorescence of Tansy Ragweed, Tansy Ragwort: Jacobaea vulgaris (Synonym: Senecio jacobaea)

The photo above shows a close-up of the inflorescence of tansy ragweed as seen along forest road #23 at the Mt. Adams viewpoint about one-half mile south of road #8810..........August 6, 2005.

Paul Slichter