Dillenia sp. (Dengen)

Dillenia sp. is a tropical tree or large shrub in the Dilleniaceae family, native to South and Southeast Asia, valued for its bold foliage and unusual flowers. Plants typically form an upright to spreading crown and can reach 15 to 40 ft depending on species. Leaves are large, thick, and prominently veined with a corrugated texture, creating a strong architectural effect. Flowers are large and open, usually white to pale yellow with numerous conspicuous stamens, followed by distinctive fruit structures formed by persistent sepals that may enclose or support the developing fruit.

This group prefers full sun to partial shade and consistently moist, well-draining soil rich in organic matter. Growth rate is moderate to fast in warm, humid conditions. Cold tolerance is limited, with damage likely below about 40F; best suited to USDA Zones 10 to 11. Dillenia species are suitable for large containers when young but are generally grown as landscape specimens in frost-free climates. Some species produce edible fruit, though use varies, and accurate identification is required before consumption.