Plant ID forum: Geraniums (Geranium); Small-flowered geranium for ID

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Name: Rob
Lehigh Valley, Pennsylvania (Zone 6b)
Ever looking for new plants to kill
Seed Starter Frogs and Toads Celebrating Gardening: 2015
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plantrob
Jul 4, 2015 7:09 AM CST
This one entered my garden as an interloper with some seed for G. wlassovianum (at least, I think this is not that species). It's been with us for years now, and despite its small flowers (the hoverfly in the first photo gives you a sense of scale) it self-seeds amply, so that it is now almost a weed. The leaves are somewhat different from most other cranesbills, a simpler shape. Unlike most cranesbills, this one closes its flowers when it's not receiving full sunlight (second photo). Any ideas as to its identity?

Thumb of 2015-07-04/plantrob/e51755


Thumb of 2015-07-04/plantrob/2c74cc

Rob from Pennsylvania - robsplants.com
[Last edited by plantrob - Jul 4, 2015 7:10 AM (+)]
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Dog Lover Celebrating Gardening: 2015 Plant Identifier
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bamira
Jul 4, 2015 7:29 AM CST
I don't see well leaves, maybe Geranium palustre

[Last edited by bamira - Jul 4, 2015 7:31 AM (+)]
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Name: Rob
Lehigh Valley, Pennsylvania (Zone 6b)
Ever looking for new plants to kill
Seed Starter Frogs and Toads Celebrating Gardening: 2015
Image
plantrob
Jul 4, 2015 7:57 AM CST
Thanks. That looks like a candidate. I just took a picture that shows the leaves more clearly (it's raining here Green Grin! ) and the leaves do seem like a good fit to photos I've found for G. palustre. I'm not so sure about the flowers: all photos of G. palustre appear to show the petals held distinctly separate, while on my plants the petals interleave to give more of a cup shape. Another comments I found elsewhere about G. palustre that gave me pause is that "it produces few leaves", whereas my plants produce quite dense mounds, as exemplified in the photo below. That could be variability within the species; the patterning on the petals is similar, as far as I can tell.

Thumb of 2015-07-04/plantrob/4de41b

Rob from Pennsylvania - robsplants.com
[Last edited by plantrob - Jul 4, 2015 8:00 AM (+)]
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Dog Lover Celebrating Gardening: 2015 Plant Identifier
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bamira
Jul 4, 2015 9:05 AM CST
I think that it is a match Geranium palustre
the colour and the shape of the petal does not act
This species is from the swamp,on the basis flower petals are densely hairy

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