Plant science for plant people.

Someone had the foresight to collect seed from a small yellow wildflower years before the western US drought of 2012-2016, then collect again when that drought peaked. Plant both batches side by side and you get to watch evolution happen.

That's what researchers did with Erythranthe laciniata: over 2,100 seed replicates from nine populations, sown into three gardens at low, central, and high elevation. The drought-era generation flowered faster and set more flowers than its pre-drought parents, but only up in the high garden. At the middle elevation, plants carried up from lower, warmer country outperformed the locals, a lag that hints the bottom edge of this species' range is running out of room.

Timing keeps showing up as the lever plants pull. A review this week gathers the evidence that heat rewires flower development itself, shifting petal size and when buds open, through genetic pathways researchers can now name rather than a vague stress response. And grasses under drought change what they leak from their roots, drawing particular soil organisms in by chemical attraction and then letting them settle along the root, where they help the plant manage water and its own stress hormones.

Four dry years were enough to move when a wildflower blooms and how many flowers it makes. Whatever your beds went through last summer, the seed you saved from them is carrying a record of it, whether or not anyone plants it out to read.