Birchleaf Mountain-mahogany

You recognize Mountain Mahogany by its tiny, birch-like deciduous leaves and distinctive feathery seed tails (styles) that persist after flowering throughout dry, rocky slopes from Washington south to California. This native shrub's deep root system taps water unavailable to competitors.

Mountain Mahogany reaches 7-15 feet tall in full sun with low water needs and exceptional drought tolerance once established (zones 8a-9b). It prefers rocky, well-drained soils, often on steep slopes, and performs poorly in wet or clay-heavy sites. Very slow-growing, long-lived, and hardy, it suits difficult landscape positions. No serious pest or disease issues documented in regional literature; monitor for the occasional root rot in unusually wet years.