PlantaeDB Logo
Login Sign-up

Genus Kibatalia in Subtribe Malouetiinae

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!

Kibatalia (Apocynaceae, Rauvolfioideae) is an East Malesian and South Indochinese genus of evergreen trees and shrubs, estimated at about 20 species (Middleton, 2004; FAO, 2021). The type species is Kibatalia macrophylla (G.Don) Merr. (Middleton, 2004). The genus forms part of the Malayan–Sundaic flora and extends from peninsular Thailand and southern Myanmar through Peninsular Malaysia, Sumatra, Borneo, the Philippines, and New Guinea (POWO, 2024; FAO, 2021).

Morphologically, Kibatalia is recognized by abundant milky latex, opposite or whorled leaves that are often glabrous, and inflorescences of lax, terminal, compound cymes. Flowers have five calyx lobes with basal glands, a campanulate corolla with five lobes, five stamens inserted in the corolla tube, and an apocarpous ovary with many ovules per carpel (Middleton, 2004). The fruit type varies across the genus: many species produce paired follicles (typical for Apocynaceae), while others are drupaceous, leading to historical confusion with genera like Alstonia and Funtumia (Leeuwenberg et al., 1997; FAO, 2021).

The diversity peak lies in Borneo and Sumatra, with several narrow endemics and several species ranging across the Sunda Shelf (FAO, 2021). Species occur in lowland to lower-montane forests up to about 1200 m, from coastal swamps to inland dipterocarp forest (Middleton, 2004; FAO, 2021).

Pollination and dispersal are rarely documented; flies or moths are likely pollinators based on flower form and scent in related Rauvolfioideae. Fruits are typically drupes or paired follicles dispersed by birds or mammals (FAO, 2021). Chromosome reports remain sparse, and a base number is not consistently established.

Within the tribe Rauvolfieae, Kibatalia forms part of the Southeast Asian “druse” group together with Kopsia and Alstonia (Potgieter & Albert, 2001). Species limits and placement have varied; Kibatalia has been treated in wider senses or synonymized with Alstonia, notably in some modern checklists (POWO, 2024), while floristic works maintain it as distinct (Leeuwenberg et al., 1997; Middleton, 2004). Phylogenetic support for a monophyletic Kibatalia independent of Alstonia remains limited in published sampling (Potgieter & Albert, 2001), and synonymization or recircumscription may follow when broader analyses are published.

Several species are used locally as ornamentals or small timber; K. macrophylla and K.Arborea (A.Cunn. ex DC.) Merr. are occasionally cultivated for foliage and shade (FAO, 2021). No species are major weeds, and invasiveness is not reported.

Conservation status varies by species; many are assessed in regional Red Lists, but data are uneven (FAO, 2021). Improved phylogenetics and population surveys are needed to resolve species limits and refine IUCN assessments (Middleton, 2004).

Pick a Species to see its components: