There are at least 30 common names associated with this plant. The one I am familiar with is Butter and Eggs. The yellow part of the flower looks like butter and the orange part looks like an egg yolk. It’s a plant that is found all across the temperate zones of the world and that probably accounts for the many common names it has been given. The orange lips of the flower must be pried open to reach the nectar. Bumble bees and large honey bees are about the only insects strong enough to do this and, as it turns out, they are particularly good at pollinating this plant. So, Butter and Eggs has come up with a very good way to attract the right insect for the job. I found this plant growing in the lawn at our apartment in Shoreview, Minnesota.