Didymosphenia geminata, commonly known as didymo or rock snot, is a species of diatom that produces nuisance growths in freshwater rivers and streams with consistently cold water temperatures and low nutrient levels.
Meaning from Greek Mythology. The legend and meaning of the peony goes all the way back to Greek mythology. It is believed that the peony is named for a person of healing named Paeon who was a student of Asclepius, the god of medicine and healing.
These peonies produce tree peony flowers and leaves on plants that behave like herbaceous peonies, dying down to the ground in winter and reemerging each spring. A mature plant may produce 50 or more dinner-plate sized flowers on strong short stems that do not require staking.