Any idea what this seed is? It is about the size of a small pea. We live in Tulsa OK and these seeds were found near our potted Begonia plants. The only other close plant is an elephant ear. The two pots are about 10 feet apart and about 50 seeds were next to each pot. Neighbor has a tree about 50 feet away. My dog might have ate a couple, so I am trying to figure out if they are poisonous.
Thanks for any help!