Fraxinus dipetala, commonly known as the California ash or two-petal ash, is a species of deciduous tree belonging to the Oleaceae family. Native to California, United States, it is primarily found in the southwestern parts of the state, particularly in coastal areas and nearby mountains.
This tree species typically reaches a height of 30 to 50 feet, with a spreading and rounded crown. Its bark is grayish-brown and develops a rough texture as it ages. The compound leaves are pinnately divided into three to five leaflets, each ovate and finely toothed along the margins. The foliage is a bright and glossy green during the growing season, turning yellow in autumn.
Fraxinus dipetala is a dioecious plant, meaning it has separate male and female flowers borne on separate trees. The flowers are small and inconspicuous, appearing in clusters that emerge in early spring before the leaves. Female flowers give way to flattened, winged fruits known as samaras or keys, which each contain a single seed. These samaras are light brown and slightly curved, allowing for wind dispersal.
This species of ash tree prefers moist and well-drained soils, thriving in habitats such as riparian zones and mixed woodlands. It is known for its ability to tolerate varying degrees of shade, making it suitable for understory planting. In landscaping, it is valued for its attractive foliage, graceful form, and overall adaptability.
However, it should be noted that Fraxinus dipetala is susceptible to certain pests and diseases, most notably the emerald ash borer and the ash dieback disease, which can cause significant damage and decline in populations. Conservation efforts are being undertaken to protect this species from these threats and promote its preservation in
