Yellow pedal Flowers (similar to Cassia Fistula) on a Albizia or Acacia Tree

This looks like a Albizia or a Acacia. The leaves are exactly like the Albizia-Mimosa but the flowers are beautiful! Yellow pedal Flowers very similar to Cassia Fistula. I found this plant last year and saved the seeds and planted over the winter in Oklahoma (zone6). As for growth it started in spring and now in July it is flowering. It does close its leaves at night. But if you touch it the leaves will not close. Right now it is only 4ft high. I think it is done growing this year because it is flowering. The plant with all the flowers; the leaves have closed/folded up during the blooming fest it is having. Can anyone help?

I was told by my husband that this plant grows to a tree about 20-30ft tall. If it is true I will be replanting this in my back yard.
Des

Partridge Pea - "Chamaecrista fasciculata"... is a species of legume native to most of the eastern United States.It is an annual which grows to approximately 0.5 meters tall.

Cassia chamaecrista L.
Thank you,
des

This flower looks cool and it's color also very eyecatching

ARTCANASPRINT also print on canvas like this flower pictures

Nice discussions regarding flowers or it's look and feel.