Plant ID forum: Wild flower in Rio de Janeiro

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Name: Myriam
Ghent, Belgium (Zone 8a)
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bonitin
Feb 20, 2016 9:54 AM CST
I found them growing in the cracks of huge old walls in the historical part of town.
Some time ago I have been searching in the Asteraceae but got nowhere..
The yellowish flowers never seemed to really open wide.

Thumb of 2016-02-20/bonitin/ed87e5

Name: Janet Super Sleuth
Near Lincoln UK
Charter ATP Member Organic Gardener Garden Photography Bee Lover Dragonflies Cat Lover
Butterflies Birds Plant Identifier I was one of the first 300 contributors to the plant database! Spiders!
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JRsbugs
Feb 20, 2016 10:38 AM CST
I think the flowers are seed heads Myriam (but I doubt you meant they were flowers). It looks like Conyza Canadensis. the first leaves are bigger but when it gets towards the flowering part they become small.

https://www.google.co.uk/search?q=conyza+canadensis&biw=1440...

https://www.google.co.uk/search?q=conyza+canadensis&biw=1440...

[Last edited by JRsbugs - Feb 20, 2016 10:44 AM (+)]
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Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
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bonitin
Feb 20, 2016 2:08 PM CST
Thanks Janet,
I meant the small buds which appear to be flowers and don't really open up like you would expect, unless these are the immature seed pods but still there are the tiny ones that would be flower-buds..I was a bit puzzled by this plant.. Rolling my eyes.

I remember now I came upon the pictures you linked too, but dropped it as the leaves on mine are much more narrow, linear, also on the lower levels of the stems..
But maybe that could be caused by the growing condition on a wall..?
Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
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bonitin
Feb 20, 2016 2:10 PM CST
Another pic that shows a whole plant, the lower leaves are linear too..
Thumb of 2016-02-20/bonitin/3f0b73

Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
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bonitin
Feb 20, 2016 2:18 PM CST
I've made a crop to show what must be flowers..
A petty I didn't have my macro lens, too risky to walk around with it in Rio!
Thumb of 2016-02-20/bonitin/997102

Name: Janet Super Sleuth
Near Lincoln UK
Charter ATP Member Organic Gardener Garden Photography Bee Lover Dragonflies Cat Lover
Butterflies Birds Plant Identifier I was one of the first 300 contributors to the plant database! Spiders!
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JRsbugs
Feb 20, 2016 3:05 PM CST
Look at the photos of Conyza canadensis on FloraSBS Myriam, a full shot shows all narrow leaves. It might depend on growing conditions, or a quirk of the species.

https://sites.google.com/site/florasbs/asteraceae/voadeira

Another ..

http://wnmu.edu/academic/nspages/gilaflora/conyza_canadensis...

Maybe it grows larger leaves in healthy soil.

There are other species of Conyza .. the flower bracts seem to be shorter on your plant.

Numerous capitula of Conyza canadensis with very visible white ligules (when compared to the other species of Conyza )


http://invasoras.pt/en/gallery/conyza-canadensis-en/

https://www.google.co.uk/search?q=Conyza&tbm=isch&imgil=Cx2N...

https://www.google.co.uk/search?q=Conyza&tbm=isch&imgil=Cx2N...

https://www.google.co.uk/search?q=Conyza&tbm=isch&imgil=Cx2N...

The flowers look more like Conyza bonariensis, the leaves I'm not sure about as they seem to vary.

http://www7a.biglobe.ne.jp/~flower_world/Asteraceae/Conyza%2...

Another, there's too many to choose from! Best to see which species are growing in the area.

https://www.google.co.uk/search?q=Conyza&tbm=isch&imgil=Cx2N...

http://www.calflora.net/losangelesarboretum/whatsbloomingjun...

Erigeron bonariensis?

https://en.wikipedia.org/wiki/Erigeron_bonariensis

Conyza bonariensis is a synonym of Erigeron bonariensis ..

http://www.theplantlist.org/tpl1.1/record/gcc-142320

When I search for "Erigeron bonariensis rio de janeiro" I only get Conyza canadensis ..

https://www.google.co.uk/search?q=Erigeron+bonariensis&sourc...
Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
Image
bonitin
Feb 20, 2016 5:56 PM CST
I am convinced Janet, it is Conyza canadensis, especially the one in your second link which even has the same narrow leaves..Amazing how much photo material of the plant there is on the web!

Thanks for your patience! Smiling
Name: Janet Super Sleuth
Near Lincoln UK
Charter ATP Member Organic Gardener Garden Photography Bee Lover Dragonflies Cat Lover
Butterflies Birds Plant Identifier I was one of the first 300 contributors to the plant database! Spiders!
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JRsbugs
Feb 20, 2016 7:14 PM CST
It does seem to be the only one it can be Myriam.

Thank You! Acorn Acorn Acorn Green Grin!
Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
Image
bonitin
Feb 21, 2016 2:46 AM CST
I had photos in our database of the plant from Belgium which is very abundant over here, I even had one sprouting in one of my plant pots last year! Hilarious!

Really strange I didn't recognize the plant, the flowers/ seedheads of the Belgian ones are much smaller and more abundant, look more 'weedy', the plants in Rio looked more like a perennial, more sturdy..How growing conditions can influence the looks of a plant!
Horseweed (Conyza canadensis)
Name: Janet Super Sleuth
Near Lincoln UK
Charter ATP Member Organic Gardener Garden Photography Bee Lover Dragonflies Cat Lover
Butterflies Birds Plant Identifier I was one of the first 300 contributors to the plant database! Spiders!
Image
JRsbugs
Feb 21, 2016 5:44 AM CST
It appeared in my garden a few years ago too, it sets around a little too easy although I quite like it. Climate and soil conditions can make a big difference.

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