Plant ID forum: Four-Petalled Yellow Oxalis

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Oregon, Willamette Valley
Inthe541
Jul 30, 2017 5:24 PM CST
I haven't been able to find an ID for any oxalis with just four petals like this one:
Thumb of 2017-07-30/Inthe541/4d7318

Name: greene
Savannah, GA (Sunset 28) (Zone 8b)
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greene
Jul 30, 2017 6:06 PM CST
Looking at the bloom, I believe the flowers belong to a different plant than the foliage you are seeing. Maybe Ludwigia? or something similar.
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Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
Jul 30, 2017 6:45 PM CST
If the leaves peaking out from behind the Oxalis belong to the mystery flowers, its a Potentilla. Maybe Potentilla erecta.
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Name: Rick R.
near Minneapolis, MN, USA zon
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Leftwood
Jul 30, 2017 7:53 PM CST
I only see leaves that are oxalis and ones that are not potentilla (simple leaves[not compound] and bracts that subtend developing buds). Potentilla almost always have 5 petals.
Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
Jul 30, 2017 9:07 PM CST
Leftwood, look at the leaves in the bottom right corner.

And look at this picture:

https://www.google.com/search?...:
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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Oregon, Willamette Valley
Inthe541
Jul 31, 2017 12:13 AM CST
I barely noticed those leaves and hadn't considered any flower other than oxalis because of the leaves and the flower color and basic form. I went back and "reverted" to the original photo (I had cropped it).
It seems like a good match for Potentilla.

Thumb of 2017-07-31/Inthe541/a170a1

[Last edited by Inthe541 - Jul 31, 2017 9:56 AM (+)]
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Name: Sue
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sooby
Jul 31, 2017 7:43 AM CST
Does Potentilla erecta grow in Oregon? It does look like P. erecta but distribution maps/lists suggest that it is only recorded from Massachusetts in North America. Most other potentilla have five petals.
Oregon, Willamette Valley
Inthe541
Jul 31, 2017 10:08 AM CST
I came across: Potentilla anglica (English Cinquefoil, Trailing Tormentil), four petals, listed in:

Cinquefoils West of the Cascade Mountains of Oregon and Washington (halleyhosting.com)
Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
Jul 31, 2017 10:19 AM CST
Check out Potentilla anglica. Four petals and listed as occuring in California and Oregon.

Cross posted with you. But we both ended up in the same spot.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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[Last edited by DaisyI - Jul 31, 2017 10:20 AM (+)]
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Name: Rick R.
near Minneapolis, MN, USA zon
I was one of the first 300 contributors to the plant database! Garden Sages The WITWIT Badge Garden Photography Region: Minnesota Hybridizer
Seed Starter Plant Identifier Million Pollinator Garden Challenge
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Leftwood
Jul 31, 2017 1:40 PM CST
Daisy, you're right. And I was thinking of a different species as P. erecta, too. D'Oh!

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