BILBAO'S FLEABANE

Erigeron floribundus

(Formerly: Conyza floribunda)
Daisy & Dandelion Family [Asteraceae]

Flowers:
month8jul month8july month8aug month8sep month8sept

Pappus: pappusZpossible (yellowish-white, simple)
pappus8jul pappus8july pappus8aug pappus8sep pappus8sept pappus8oct

status
statusZneophyte
flower
flower8white
inner
inner8red
petals
petalsZMany
type
typeZclustered
type
typeZtubular
stem
stem8round
stem
stem8fluted
sex
sexZbisexual

29th Sept 2018, Wellesbourne, Warwickshire, West Midlands. Photo: © Diane Napier
The flowerhead is fairly dense, but this specimen appears denser than most. Grows up to 1.5m (sometimes up to 2m) high.


26th July 2017, Stratford Upon Avon, West Midlands. Photo: © Diane Napier
The stems and phyllaries surrounding the flowers are green. Unlike either Guernsey Fleabane (where the inflorescence is pyramidal - wider at the bottom) and Argentine Fleabane (where the inflorescence has long lateral branches)) the inflorescence of Bilbao's Fleabane gets wider at the top from a narrow base.

The outer florets nearest the phyllaries either do not overtop the phyllaries or only just overtop them (here they seem to slightly overtop the phyllaries).



26th July 2017, Stratford Upon Avon, West Midlands. Photo: © Diane Napier
The phyllaries are not red-tipped (although they do have a slight pale pink tinge here).

At fruiting (which these specimens are not) the capitulas are smaller (just 3 to 5mm at fruiting) than those on either Guernsey Fleabane (5 to 8mm wide at fruiting) or on Argentine Fleabane (7 - 11mm wide at fruiting).

Like Guernsey Fleabane the outer florets sometimes have tiny rays or not.



15th Aug 2017, Leamington spa, Warwickshire. Photo: © Diane Napier
The lower leaves (upper ones are much narrower and linear). They have short, tiny, forwardly-directed hairs on little pedestals on the edges of the lower (broader) leaves. (Your Author knows not whether the upper linear leaves are similarly hairy).


29th Sept 2018, Wellesbourne, Warwickshire, West Midlands. Photo: © Diane Napier
The hairs are even shorter on the surface of the leaf.


Many similarities to : Guernsey Fleabane (Erigeron sumatrensis), Argentine Fleabane (Erigeron bonariensis) and Canadian Fleabane (Erigeron canadensis) which are all in the same genus.

The pappus is yellowish-white on Bilbao's Fleabane (yellowish-white on Guernsey Fleabane too - but greyish or off-white on Argentine Fleabane).

No relation to : Bilbo Baggins, a Hobbit found either in the Shire, Middle Earth or the Bad Lands beyond mostly populated by despicable orcs and a very nasty overlord but there are some mostly agreeable elves there too and the odd magician.

Bilbao's Fleabane was first found (on English soil) in 1977 and is frequent in South and Central Britain, South and Central Ireland and in the Channel Islands but scarce in Northern Britain and Northern Ireland.

It is similar to Canadian Fleabane but has disc florets which are 5 lobed (they are mainly 4 lobed but occasionally 5 lobed in Canadian Fleabane). It is also taller than Canadian Fleabane and more densely hairy.

Bilboa's Fleabane can hybridise with Canadian Fleabane to yield the hybrid called Erigeron × foucaudii (previously named Conyza × mixta) which was sterile and intermediate in features and was found in Middlesex in 1993. So it looks like you will very likely not find another let alone this one which by now has probably gone to meet its maker.


  Erigeron floribundus  ⇐ Global Aspect ⇒ Asteraceae  

Distribution
 family8Daisy & Dandelion family8Asteraceae
 BSBI maps
genus8Conyza
Conyza
(Fleabanes)

BILBAO'S FLEABANE

Erigeron floribundus

(Formerly: Conyza floribunda)
Daisy & Dandelion Family [Asteraceae]