Mystery Seed of the Week 105

Hints:  We once had another plant of the same genus for a Seed of the Week.

The seeds have a similar squarish shape, although they were a different color. These seeds are formed in a pod (I don't have a photograph of one.)

The brilliant yellow flowers of this small desert tree also resemble that of its orange-red relative, although its relative is a large shrub.

Can you guess what tree these seeds are from?

Edit:  the answer is now posted.

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