Instead of freezing unwanted crested floatinghearts and bringing them to a local landfill, many homeowners toss them into canals, say researchers who have compiled data to quantify the seriousness that crested floatingheart poses for canals. Crested floatinghearts reproduce mostly by way of ramets, an asexual form of multiplying. Gettys is trying to find out how many “babies” a single plant can make.