Nobody planted it. It simply appeared one season and came back — a dwarf iris, white as bone china, with a flush of yellow at the heart. Shot from directly above, the six petals open in near-perfect symmetry, their surfaces finely veined, catching light that seems to come from within. The blossoms don't linger. A day, maybe two, and they're gone. But it keeps showing up, and that's enough reason to welcome it.