Several years ago, we fell in love with a group of native—well, to the Southeast—plants known as Louisiana irises. Clearly, we're not alone. Their "extraordinary beauty and ease of care have made Louisiana irises increasingly popular all over the world," notes New Orleans Times-Picayune garden columnist Dan Gill, and while I can't remember how we discovered these charmers, which thrive in bayous and bogs but are also quite happy in well-watered garden soils, we succumbed to their beauty and soon had a few growing in various semi-sodden spots. They rewarded our attention with extraordinary blossoms... and then they disappeared. Every June we wondered where they went, and this year, we got the answer: they never left. For whatever reason, they simply didn't put up flowers, and since their leaves are not all that easy to distinguish from other kinds of native irises—mea culpa, we didn't tag the plantings—we simply lost them. This year's conditions were more to their floral liking. Time to enjoy the show... and "plant" some markers.