As I've said, I think goldenrods are exceptionally beautiful. I will admit there is a second reason they appeal to me. They are relatively easy to identify for a genus with so many species. There are a little over a hundred of them. Bluestem is one of the easiest. Unlike other goldenrods, its flowers are clustered where the leaves meet the stem. Most others have flower clusters at the end of the stem. But nature, thankfully, never leaves well enough alone. There are always delightful complications. Among those are hybrids. Bluestem can cross with several other species, producing plants with flowers among the leaves and in larger arrays at the end. The one here is a cross of bluestem and Canada goldenrod that appeared spontaneously in my garden.