Some of them are the spitting image of maple keys, only single.
Technically they are single seeded pods.

Iris Cohen schreef
Looking at the picture of Tipuana in the field guide, I could see the
relationship. Independent parallel invention.
Iris

+ + +
Quite.
also in Dipterocarpaceae, eg Shorea
and in Sterculiaceae / Malvaceae sl eg Triplochiton scleroxylon
PvR