Marsh marigolds, or Caltha palustris, are moisture-loving plants that typically grow wild along riverbanks and in shallow water at the edge of streams. While their lush, glossy-green foliage is ...

But when Glynn opened the photo, another plant, visible in the foreground, seized her attention. She knew at once what it was: Floerkea proserpinacoides, or false mermaid-weed, an herb that had not ...