Fringecup is a clumping, shade-loving perennial that spreads via short rhizomes. It's similar to mitrewort, but sort of a more robust, colonizing version. You can expect tight clusters of slightly fuzzy lobed leaves, and tall delicate wands of little white to reddish flowers. Look closely at the flowers and you'll see spiky reflexed petals that (to me) have a very sci-fi feel. Color of the flowers varies, but mine tend towards reddish.
 
Fringecup is well adapted to disturbance and will spread gradually into empty areas to create a dense patch. However, it looks just as nice standing alone (such as in a rock garden). Wetter shadier parts of the yard are ideal, but some sun (preferably morning) is ok. Like pretty much all the plants here, it likes moisture but not standing sogginess, so make sure your soil drains. 
 
Plant with wild strawberry, merten's sedge, and large-leaf avens to truly cover every last speck of bare ground.
 
 
First image credit: Walter Siegmund - Own work, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=2201194