March 26, 2023: For nearly 100 years, Mexico City residents have enjoyed jacaranda season: a “fascinating sorcery” that brings a little bit of the Amazon rainforest to urbanites’ doorstep, as Alberto Ruy Sánchez wrote in his 2019 book “Dicen las Jacarandas.” And when the flowers fall, “the sky blooms on the ground,” an unexpected burst of color at one’s feet.