Identification of the plant was easy: jewelweed (a species in the Impatiens genus), also known as touch-me-not, for obvious reasons. My host raised an eyebrow when I said “jewelweed,’’ then shook his ...

At a recent dinner party, my host launched into a monologue about a plant he had discovered in his garden and was delighted with. It had, he said, green leaves (what a clue!) and large, yellow flowers ...