---

Ahh... pollinia! I had never heard of that term before. I did some more research and believe these yellow objects are Milkweed pollinia, or more precisely, Milkweed pollinaria. (Milkweed is prevalent in northern USA prairies.) According to the Milkweed Flowers Web site, the "whole upside-down-V-shaped structure with its pollinarium gland and two pollinia is called a pollinarium."

Thank you!