PlantaeDB Logo
Login Sign-up

Genus Dichapetalum in Family Dichapetalaceae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Dichapetalum (Thouars) is the largest genus in Dichapetalaceae and includes roughly 120–140 species of lianas, shrubs, and small trees occurring across tropical Africa, the Americas, and Southeast Asia to New Guinea, with the greatest diversity in Africa. The type species is D. madagascariense Thouars (Dichapetalaceae sensu APG IV, 2016; POWO, 2024). The genus is recognized by a woody habit, leaves that are simple, alternate, and often have stellate or dendritic hairs, and by prominent stipules that usually fall early. Inflorescences are axillary thyrses with characteristic dichasial branching; flowers are small, actinomorphic, and cream to greenish, typically with five sepals that are free or basally connate, five petals with broad, reflexed limbs, five stamens opposite the sepals, and a superior to half-inferior bilocular ovary with one or two ovules per locule and pendulous, axile or parietal placentation. The fruit is a drupe with one or two pyrenes, and seeds lack endosperm with ruminate cotyledons (Hallé, 1967; Botineau et al., 2008; Buerki et al., 2010).

Species richness is highest in tropical Africa, with additional centers in the Neotropics and a handful of taxa in Southeast Asia to New Guinea, implying historical dispersals and vicariance consistent with Gondwanan fragmentation patterns; many taxa are lowland rainforest specialists, while others occur in forest margins and secondary vegetation (Buerki et al., 2010; WFO, 2024). Native ants are recorded as occasional seed dispersers, and floral morphology suggests a generalist insect syndrome; details remain incomplete. Chromosome counts are sparse and inconsistent, and no base number is firmly established (Hallé, 1967; Botineau et al., 2008).

Dichapetalum is not subdivided into formal subgenera or sections in recent treatments; some species formerly placed in Stephanosepalum have been re-circumscribed within Dichapetalum, while others are maintained by a minority of authors, notably Le этоттose (Hallé, 1967; Buerki et al., 2010). The family Dichapetalaceae is strongly supported as distinct from, though often historically conflated with, the Chrysobalanaceae (APG IV, 2016). The genus has limited horticultural significance outside niche cultivation of ornamental forms; the plants are not major timber or crop species and are not widely regarded as invasive. Several taxa with restricted distributions are potentially threatened by habitat loss; future work should refine species limits, complete species-level phylogenies, and consolidate chromosome data to support conservation planning (Buerki et al., 2010; POWO, 2024).

Pick a Species to see its components: