The National Audubon Society’s “Wildflowers of North America” (Knopf, 2023) is a tour de force in the realm of plant guides. Full-page profiles of more than 850 species are included, each of ...

Thistle is tricky because birds and butterflies love it, but gardeners and farmers hate it. We asked our gardening expert for ...

While teasle, a thistle-like plant, is disliked because it's extremely invasive and chokes out native plants, wild parsnip (also called poison parsnip) and poison hemlock are toxic.