This was identified as Oxalis succulenta, but that is listed as a synonym on several nomenclature sites, the accepted species being either Oxalis herrerae, or Oxalis megalorrhiza. Neither of those look at all like this thing.
And then there is Oxalis teneriensis, which appears in searches as well.
Any ideas?

@Baja_Costero

BTW, this is growing outside in chilly San Francisco, but grows well as a houseplant too.

Compare to Kalanchoe tubiflora:
Chandelier Plant (Kalanchoe delagoensis)

Those yellow flowers are of an Oxalis.
Each fat petiole has a three-part leaf at the tip.

I wonder if it might be the invasive Bermuda Buttercup (Oxalis pes-caprae) which is often found sprouting in container plants from nurseries ... at least here in Florida.

It is apparently found in some parts of California: https://www.cal-ipc.org/plants...

More information and photos of O. pes-caprae on these pages:
https://ipm.ucanr.edu/PMG/WEED...
https://nathistoc.bio.uci.edu/...

plantladylin said: I wonder if it might be the invasive Bermuda Buttercup (Oxalis pes-caprae) which is often found sprouting in container plants from nurseries ... at least here in Florida.

It is apparently found in some parts of California: https://www.cal-ipc.org/plants...

Trust me, I know that one quite well, having pulled up truck-loads of it. This is a rare plant.

And really cool-looking. Dang you, now I have to find that too!

No idea there could be an Oxalis that looked like that. I just glanced quickly, wondered where you thought an Oxalis might be and thought the yellow flower was not connected to the brownish plant, which looked like it has plantlets @ the tips.

This pic is similar, but nowhere near as grand of a plant as your pics, Hortica : )
https://grootscholten.fotki.co...

I'm intrigued, I want one. Fun discoveries like this are why I love Plant ID forum!

No idea, sorry.

Please read to bottom.
I should hasve split this into 2 posts.

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Just looking...According to Kew .....Oxalis megalorrhiza is the accepted official name for Oxalis succulenta.
It seems to have many many other synonyms.
https://powo.science.kew.org/t...
My pics.....I cannot vouch for accuracy.








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I followed purpleinopp suggestion further.

Oxalis herrarae would certainly be a good possibility.

Quote from link below.
"OXALIS HERRERAE

This unusual oxalis species does not have bulbs, but is a perennial plant with succulent like foliage. In rich soil, with plenty of water it is a lush & leafy plant, & in a drier situation it drops its leaves to show its succulent stems. Clusters of yellow flowers appear throughout the year. Makes a nice hanging plant for indoors."

https://www.collectorscorner.n...
This would account for differing images on www.

According to Kew it comes from Peru .
There is a herbarium specimen but no pics of it.

https://www.google.com/search?...
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plantladylin said: I wonder if it might be the invasive Bermuda Buttercup (Oxalis pes-caprae) which is often found sprouting in container plants from nurseries ... at least here in Florida.

It is apparently found in some parts of California: https://www.cal-ipc.org/plants...

Please see post above this.

Oxalis pes caprae......A few pic.
Deffinitely not the mystery plant.

Thanks, Silversurfer, but as you can see O. megalorrhiza images do not look at all like this "succulenta". It has succulent petioles unlike every image of O. megalorrhiza, including that Kew herbarium sheet. It is a sprawling creeper. The flowers don't open as wide as megalorrhiza either.
Oxalis megalorrhiza Jacq. was described by Jacquin in 1794.
Oxalis succulenta Barnéoud was described in 1845.
O. teneriensis image searches also show two plants, one is the mystery plant. This was described as Oxalis teneriensis R. Knuth in 1915.
Oxalis herrerae image searches show two different plants, one of which is the mystery plant with fat petioles, but the other is dissimilar, and that is the form that is conforms with the original description of that species. Some sites list this as a synonym of O. teneriensis. Oxalis herrerae was also described by Knuth, but in 1930.
Google Scholar has not yielded any papers that clear this mystery up.