nitrogen fixing tree

Squaw Valley, CA(Zone 9a)

saw this on the side of the road and had to grab some pods, would love to know what it is.

Thumbnail by Oasis93675 Thumbnail by Oasis93675 Thumbnail by Oasis93675
San Francisco, CA

Acacia baileyana - considered an invasive species in much of California

Squaw Valley, CA(Zone 9a)

It's not Acacia baileyana. The leaflets are more distinct, the pods are thinner/straight edged and the foliage is not blue-green.

https://davesgarden.com/guides/pf/showimage/178512/

Squaw Valley, CA(Zone 9a)

Does anyone else have any input about this tree?

Auburn, AL

Did it have thorns?

Why do you call it "nitrogen fixing"?

Squaw Valley, CA(Zone 9a)

No thorns that I recall and I went into it to retrieve pods. I call it nitrogen fixing because generally trees with legume type pods associate with bacteria that allow for the fixation of nitrogen in root nodules.

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