The word ‘migration’ conjures images of vast wildebeest or pronghorn herds crossing plains in unison, or hummingbirds traversing the Gulf of Mexico. When charismatic birds leave our Northeastern forests, migration is typically the explanation. But how can a group of plants disappear, without discarding leaves, stems, or other evidence of their presence?
Duckweeds are in the subfamily Lemnoideae and are the world’s smallest flowering plant. Their small oval leaves float on ponds and quiet backwaters. Root-like fibers dangle in the water. Although I’d noticed them on St. Michael’s College experimental ponds, as an entomologist, I’d never paid them close attention. Until they disappeared. » Continue Reading.