The structure of the flower can be confusing, as few different tree's share similar flower structure. Mimosa's, Albizia, and some Acacia trees can share similar flower structure.
i think what you have on the pictures is
Calliandra surinamensis (judging by the size of the leaves) .
You should check if it matches the bark texture for example and other details.
Also this thread ( THE
Acacia thread by Nen888 ) will come handy if you read it carefully, it has lot's of excellent information. other plants of interest are also mentioned inside, like the calliandra.
There are few references from literature posted in the acacia link i left you, which say that tryptamines are absent in Calliandras, but some of them contain the b-carboline THH.