I've been feeling so much better lately that Scientist let me go back to my den. Tall patches of clover have started growing everywhere, so I went on a trek to find any ones that have four leaves. While I haven't found any yet, here's what I did find out!
In the fields closest to my pond, there are two main species that I could see: white clover, with the tall white flowers; and the Lesser Hop Trefoil, with the small yellow flowers.
White clover, or Trifolium repens, is native to Europe and central Asia but not to the Americas. It is able to spread so far and quickly wherever it's planted due to its vast underground system of creeping stems called "stolons". The rooting ability of the stolons helps white clover come back every spring even when the main seeding part of the plant. White clover is also frequently used for anything from hay for livestock to erosion control in certain parts of North America.
Lesser Hop Trefoil, or Trifolium dubium, has a similar range to white clover. Its leaves are small and arranged three to stem, thus the specific name "trefoil". It can grow in dry and hot areas, and many insect pollinators and herbivores like it when fields have a variety of clover. Several small birds, mammals, and reptiles use it for cover and nesting.
In fact, many animals use both kinds of clover as a source of food. Even humans can eat its flowers, stems, and leaves as long as they're boiled for maximum digestibility. Some human cultures have medical uses for these kinds of clover.
I'm glad to be back outside! Chelys, out!