Not to be semantically confused with :
Perennial Ragweed (Ambrosia psilostachya) or Ragweed (Ambrosia artemisiifolia) but these totally lack any ray florets [more members of the Dandelion & Daisy Family (Asteraceae)]. Nor with Ragged-Robin (Silene flos-cuculi) [a member of the Campion family (Caryophyllacaea)].
Many similarities to :
Monro's Ragwort (Brachyglottis monroi) but that grows only in very few places and to
Hedge Ragwort (Brachyglottis repanda) which grows only in the Scilly Isles. They have either rounded creanate teeth or minute teeth, respectively.
Uniquely identifiable characteristics
Distinguishing Feature :
A popular garden shrub that grows to 2m, with new shoots growing rapidly. The branches have a habit of changing direction suddenly, giving it a very crooked appearance when examined beneath the panoply of evergreen leaves and flowers. However, even though it is relatively fast growing, it is highly resistant to severe and extended frosts of -18C. In mid June it flowers with a profusion of yellow Daisy-type flowers but most are lucky to last a fortnight, although the odd one or two miraculously seem to linger on until October or November. After flowering the flowers turn to parachuted seeds (a pappus) similar to those of Dandelion (but not Daisy, as that does not produce a pappus).
It readily escapes from gardens and grows usually near the sea (or in Greater London). It seems the Isle of Man was once populated by them, but they have not been reported as existing there since the turn of the last Century, AD2000.
Another shrub also belonging to the Dandelion & Daisy Family (Asteraceae) is New-Zealand Holly (Olearia macrodonta) a non-native but often planted and escaping bush which grows near the coastal fringe. It has white Daisy-type flowers.
Was once admitted into the Senecio genus, but now expunged in favour of the Brachyglottis genus. Both of these genera are in the Asteraceae family.
It is slightly poisonous containing some Pyrrolizidine alkaloids.