crack willow Directory References Discover Does Ball Lightning Exist? What’s the Difference Between a Turtle and a Tortoise? Why Do Bananas Turn Brown? Timeline of the 1990s All 119 References in “We Didn’t Start the Fire,” Explained Flags That Look Alike New Seven Wonders of the World Contents crack willow plant Also known as: Salix fragilis, brittle willow Learn about this topic in these articles:description In willownigra), crack, or brittle (S. fragilis), and white (S. alba), all reaching 20 metres (65 feet) or more; the first named is North American, the other two Eurasian but naturalized widely. All are common in lowland situations. Read More