Pale agoseris is closely related to the dandelion, but it's like Cinderella all gussied up for the ball whereas dandelions are the ugly stepsisters. It's is a perennial, returning year after year to create a slowly spreading patch of thick pale green strap-like leaves which rarely reach above 8". In the summer it sends up leafless stalks with one flower each. The flowers are large and deep yellow, and when they go to seed they look like giant snowballs.
 
You might find it in any fairly intact grassland in our area, but it seems to prefer slopes and ridges, a testament to its low water needs. This is not a weedy species, but it will slowly spread to form a small colony if it has the space. Ive had success growing this plant in partial shade, but it will flower more vigorously in full sun. Well-drained soil is a must. 
 
Pale agoseris is a perfect companion for purple and blue penstemons (especially small-flower, alberta, and wilcox). The timing just seems to work out and the yellow really pops. It's also a great low maintenance plant for a prairie planting, is the leaves will fill in spaces between bunchgrasses.