Casearia grewiifolia (Salicaceae). Voucher: Swenson et al. 1541. Vietnam, Vĩnh Phúc Province, Tam Dao National Park: along trail in the southern outskirts of Tam Dao town, alt. 870 masl (21.44833 105.64722). Swedish Museum of Natural History expedition to Vietnam 2013, sponsored by National Geographic Global Exploration Fund Northern Europe.
Salicaceae or the willow family (although they contain more than just the willow genus, Salix) is a family of flowering plants. Recent genetic studies summarized by the Angiosperm Phylogeny Group has greatly expanded the circumscription of the family to contain 55 genera.