Here are a few facts/stories about the Dandelion Clock.
Every child knows how to tell the time by a dandelion clock. You blow till the seed is all blown away, and you count each of the puffs—an hour to a puff.
The plant is also known as blowball, cankerwort, doon-head-clock, witch's gowan, milk witch, lion's-tooth, yellow-gowan, Irish daisy, monks-head, priest's-crown, and puff-ball; other common names include faceclock, pee-a-bed, wet-a-bed, swine's snout, white endive, and wild endive.
Most modern admirers consider it a symbol of fighting through the challenges of life and emerging victorious on the other side. Others use it as a visual reminder of the sun's power, especially when depression or grief makes it hard to stay sunny.