The bloom is a trap. Its broad, five-petalled face, with one petal often marked more strongly than the rest, borrows the visual grammar of an orchid, yet the plant sits in Fabaceae, the legume family, rather than Orchidaceae. Looks mislead. The emblem is an exercise in convergent appearance, not botanical kinship: showy petals can arise through separate evolutionary routes.Leaves tell more. Each b...More