Applequist, W.L. (2016). A reconsideration of the infrageneric classification of Homalium Jacq. (Salicaceae). Candollea 71: 231–256. In English, English and French abstracts.
Homalium Jacq. (Salicaceae) is widespread in tropical regions and includes considerable diversity in floral morphology. Its modern infrageneric classification is complex, including two subgenera and nine sections. Morphological variation within the genus is described, and an emended classification including ten sections is proposed. Subgenera have been defined by stamen number : subg. Homalium has stamens in fascicles of two to 12, while subg. Blackwellia (Benth.) Warb. has one stamen per petal. These subgenera are not natural groups; since the relationships of some sections are uncertain, recognition of subgenera may not be of value and is not upheld here. Sect. Eumyriantheia Warb. is polyphyletic; it is herein restricted to Malagasy species, while sect. Polyanthera Warb. is revived for fasciculate-stamened species from Asia to the Pacific region. Also, three Malagasy species formerly placed within sect. Blackwellia Benth. (Homalium brachystylis (Tul.) Baill., Homalium longistaminum H. Perrier, and Homalium planiflorum (Boivin ex Tul.) Baill.) are transferred to sect. Odontolobus Warb. Several problematic species are individually discussed.