I had some time to go wildflower hunting yesterday and found myself in a field of these little pink and white flowers. I learned this morning that they are fittingly called crown vetch, or axseed. I can only assume that I've seen them countless times throughout my life, but I just never took a closer look. A Google search told me that they are considered invasive in many areas, that they are poisonous in large quantities to horses, and that they provide excellent erosion-resisting groundcover. They're also ubiquitous and hardy, which many find to be unforgivable qualities in plants of all kinds.