Then came meteorological botanomancy, which really was interesting but which very few people had mastered, no more than could be counted on the fingers of one hand, and which was based on observation of the reactions of plants. For example: if the poppy lifts its petals, the weather will be fine. For example: if a poplar begins to quiver, something unexpected will happen. For example: if the little flower with white petals and a tiny yellow corolla, called the pijulí, bows its head, it will be hot. For example: if another flower, the kind with yellowish and sometimes pink petals, called camphor in Sonora—why I don’t know—and crow’s beak in Sinaloa because from a distance it looks like a hummingbird, well, if the little rascal shuts, then rain is coming.
Roberto Bolaño, 2666 (via under-the-volcano