Physocarpus capitatus, commonly called Pacific ninebark or tall ninebark, is a species of Physocarpus native to western North America from southern Alaska east to Montana and Utah, and south to southern California. It is often found in wetlands, but also forms thickets along rivers and in moist forest habitats. While it grows most robustly in wet environments, it is drought-tolerant to a degree and is a popular California garden plant.