CANADIAN FLEABANE

Conyza canadensis

Daisy Family [Asteraceae]  

Flowers:
month8jun month8june month8jul month8july month8Aug month8sep month8sept

Pappus: pappusZpossible (white)
pappus8aug pappus8sep pappus8sept pappus8oct pappus8nov

status
statusZneophyte
flower
flower8bicolour
flower
flower8white
inner
inner8yellow
morph
morph8actino
petals
petalsZmany
stem
stem8round

27th July 2007, Hall Road, Merseyside. Photo: © RWD
Given good soil it can grow to a metre high.


16th Aug 2008, Chester, Cheshire. Photo: © RWD
A multitude of flowers at the ends of branched stems.


14th July 2007, Three Waters Meet, Bridgewater Canal. Photo: © RWD
sepals are finely ridged. Florets emerge no more than 1/3rd of the way oit rom the sepals like a miniature shaving brushes.


14th July 2007, Three Waters Meet, Bridgewater Canal. Photo: © RWD
Branches from main stem are themselves branched. Leaves finely toothed, long, narrow and gradually tapered o a point.


14th July 2007, Three Waters Meet, Bridgewater Canal. Photo: © RWD
Stems are ridged and have a few longish hairs, as do the leaves.


27th July 2007, Hall Road, Merseyside. Photo: © RWD


27th July 2007, Hall Road, Merseyside. Photo: © RWD
Un-opened flower buds start off spherical.


10th Sept 2007, Plank Lane, Wigan Canal. Photo: © RWD


10th Sept 2007, Plank Lane, Wigan Canal. Photo: © RWD
Outer florets white, inner ones yellow. No splayed-out ray florets.


14th July 2007, Three Waters Meet, Bridgewater Canal. Photo: © RWD
The flowers are similar to those of Blue Fleabane, but the outer florets are white rather than blue.


20th Aug 2014, waste ground, Hightown, Sefton Coast. Photo: © RWD
This is as wide as the flower ever opens.


S
20th Aug 2014, waste ground, Hightown, Sefton Coast. Photo: © RWD
The sepal bracts overlap one another and are if differing lengths.


Roman Fort, Castlefields, Mcr. Photo: © RWD
Gone to seed.


Roman Fort, Castlefields, Mcr. Photo: © RWD
Where all the seeds have dispersed, leaving empty 'pepper-pots'.


Roman Fort, Castlefields, Mcr. Photo: © RWD
The seed clocks are hemi-spherical, fawnish off-white, and about a quarter of the diameter of Dandelion clocks.


Hybridises with: Argentine Fleabane to produce Conyza bonariensis × canadensis.

Blue Fleabane (Erigeron acris) forms an Erigeron X Conyza Inter-Genera hybrid with Canadian Fleabane called X Conyzigeron huelsenii, the genera of which (Conyzigeron) is a semantic amalgamation of Erigeron and Conyza. This inter-genera hybrid occurs only sporadically when the two parents are present nearby - in disturbed sandy places in Southern England. This hybrid is sterile and is intermediate in hairiness between the two species with pale-mauve ray-florets (which are not splayed out and hardly protrude from the phyllaries). BSBI distribution of X Conyzigeron huelsenii

Not to be confused with: Canadian Goldenrod (Solidago canadensis) [a plant with similar name].

Like Daisy, Common Fleabane contains the poisonous polyacetylene Lachnophyllum Ester.

Most unusually, the yellow disc-florets in the centre have but four lobes and not the usual 5-lobes.


  Conyza canadensis  ⇐ Global Aspect ⇒ Asteraceae  

Distribution
family8Daisy family8dandelion family8Asteracaea

 BSBI maps
genus8conyza
Conyza
(Fleabanes)

CANADIAN FLEABANE

Conyza canadensis

Daisy Family [Asteraceae]  

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