Oahu and Big Island mgambo seeds (picture)

Admitting I took this picture several months ago, and finally illustrating the difference. The seeds I got from Oahu (on the left side of the picture) are darker and smaller. The ones from the Big Island (right side) are bigger and lighter in color.

These are also known as weleweka, Hawaiian pussy willow, Maui Mink (and of course mgambo).