09/03/2026
Wildflower Wednesday: Hoary Tansyaster
Right now, when a lot of the park has gone gold and brittle, Hoary Tansyaster (Dieteria canescens) is just getting started. This is a late season bloomer, often holding on into October, when almost nothing else on the trail is offering color.
The name comes from the fine gray hairs covering its leaves and stems, giving the whole plant a dusty, silvered look. Those hairs trap a thin layer of still air against the leaf surface, cutting moisture loss in a plant that's built for dry, disturbed, sun blasted ground: roadsides, gravelly slopes, the kind of thin soil most things skip.
The flowers themselves are the classic aster shape, lavender to purple rays around a yellow center, but there can be dozens of them on a single bushy plant, so a patch of tansyaster can look like a haze of pale purple against the dried grass. Bees and butterflies rely on it heavily this time of year, since it's one of the last real nectar sources standing before frost.
📷: Carolina Neyra (iNaturalist)