On urban roadside black bracts bases
No interactions present.
The first two of these pictures are of Senecio squalidus (Oxford Ragwort). Only the last two are of Senecio vulgaris (Groundsel)
They all look fine for S. vulgaris to my old eyes.
Thanks Cabbageleek (Great name by the way :-) ) thanks for your suggestion . Graeme's "old eyes" are normally pretty sharp - but I did double check on the way home up the very large hill out of Halifax ironically adjacent to the old railway area. Ragworts in themselves can be difficult and are of course the same Genus
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