Thanks a bunch Neil, I am visiting folks down in the Caribbean and they had it growing among the plantain rows as a green mulch.
Now that I had a name, I searched Go-ogle, and the gladiata is reddish and the ensiformis is white. So what I saw were Canavalia Ensiformis. Thnaks again!
We can green the world through random acts of planting.
Until you dig a hole, plant a tree, water it and make it survive, you haven't done a thing - Wangari Maathai