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.
Slide show: 20 gorgeous peonies. What's new: Itoh, or intersectional, hybrids are crosses between herbaceous and tree peonies. They grow to 3Â½ feet tall; pump out flowers in shades of lavender, pink, copper, yellow, or cream; and bloom over a longer period than standard herbaceous types.