U.S.A., Oregon, Jackson, Johnson Creek. #39-4E-27 crosses Creek. From there upstream to and including marsh.
T39S R4E S24
by creek and in marsh; more plants along creek than in marsh, with Spiraea
flowering
uncommon of late in OR. large population, many thousands of plants, about 1 mile long. Two other tiny marginal populations in area. [very young inflorescence]