Common Ragwort - Jacobaea vulgaris

Alternative names
Ragwort and Senecio jacobaea
Description

Medium to tall plant, stems erect to 1.5 metres, branched above. Basal and lower leaves pinnately lobed, with a small end lobe, withering by flowering time. Upper leaves 1 to 2 pinnately lobed, half clasping the stem. Flowerheads bright golden yellow, 15 to 25 mm with 12 to 15 rays, borne in large, flat topped, branched clusters.

Similar Species

Oxford Ragwort, Hoary Ragwort and Marsh Ragwort 

Identification difficulty
ID checklist (your specimen should have all of these features)

Dense flat-topped corymbs; terminal lobe of leaf not much larger than lateral lobes (much larger in Marsh Ragwort); supplementary phyllaries (bracts under flower head) less than half as long as main ones.  Oxford Ragwort has looser corymbs and black-tipped phyllaries.  Hoary Ragwort has leaves with dense greyish cottony hairs underneath, narrow lobes and longer supplementary phyllaries (about half as long as main ones).   

Phyllaries often stated to be black-tipped, but this is not a key characteristic.

Recording advice

Check the leaf-shape and general growth habit

Habitat

Waste and poor land, rough grassland, roadsides and banks.

When to see it

June to November.

Life History

Biennial or perennial.

UK Status

Common throughout Britain.

VC55 Status

Common in Leicestershire and Rutland.

Further Information

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species profile

Common names
Common Ragwort
Species group:
Wildflowers
Kingdom:
Plantae
Order:
Asterales
Family:
Asteraceae
Records on NatureSpot:
699
First record:
11/05/1992 (John Mousley;Steve Grover)
Last record:
02/02/2026 (Ramsell, Jean)

Total records by month

% of records within its species group

10km squares with records

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Latest images

Latest records

Photo of the association

Aphis jacobaeae

The aphid feed mainly on Ragwort species, although Groundsel may be used. The body length of Aphis jacobaeae apterae is 1.8 to 2.2 mm. Immatures and adults are greeny-black - all segments of the antennae are dark.  The legs are dark except for the extreme bases of their femora.

Photo of the association

Sphenella marginata

The larvae of the fly Sphenella marginata mine flowers of Ragworts and Groundsels. The flower head widens at is base, resulting in a cone shape; the bracts are widened. The affected flower heads contain one white maggot, or a brown puparium.

Photo of the association

Puccinia lagenophorae

Puccinia lagenophorae is a gall-causing rust affecting stems and leaves of Common Groundsel, and occasionally Oxford Ragwort (Senecio squalidus) and Common Ragwort (Jacobaea vulgaris).  It causes swelling and distortion of stems and leaves, with bright orange aecia.  There are no uredinia or spermogonia, and the blackish-brown telia are rarely seen.

Photo of the association

Cinnabar

The caterpillars of the Cinnabar moth feed on the leaves and flowers of Common Ragwort (Senecio jacobaea). Occasionally they are found on other ragworts and groundsels.

Photo of the association

Ragwort Flea Beetle

2-4mm long, this golden brown beetle feeds on the leaves of Ragwort, particularly Common Ragwort. It can be found from June to October.