Durio is a genus of approximately 29 tropical tree species in the mallow family Malvaceae, placed in the tribe Durioneae within the subfamily Helicteroideae. Native to Southeast Asia, the genus is best known for producing the durian — a large, thorny fruit widely regarded across the region as the "king of fruits."
Of the 29 recognised species, nine produce edible fruit, though only Durio zibethinus reaches the international market; the remaining edible species are traded locally within their native range. The fruit is distinctive for its formidable size — up to 30 centimetres long and 15 centimetres in diameter, typically weighing one to three kilograms — and for its thick, spike-covered husk that ranges from green to brown. The flesh varies from pale yellow to deep red depending on the species.
Durio's most notorious trait is its odour. The edible flesh emits a strong, penetrating smell that persists even through the intact husk. Reactions range from revulsion (comparisons to rotting onions, turpentine, or sewage) to enthusiastic appreciation, and the fruit's persistence in enclosed spaces has led to bans in hotels and on public transport across parts of Southeast Asia.
Taxonomically, the genus has moved through several placements. It was long housed in Bombacaceae on the strength of its monothecate anthers — a feature rare among mallows — before molecular phylogenetic studies repositioned Durioneae inside an expanded Malvaceae. Durio sensu stricto comprises 24 species closely related to the segregate genus Boschia (6 species), the two being vegetatively indistinguishable but differing in how their anther locules open. Together with Cullenia, these three genera form a clade defined by their highly modified anther structure.
Etymology
The genus name Durio and the common name "durian" both derive from the Indo-Malay word duri, meaning "thorn" or "protuberance," a direct reference to the sharp spines covering the fruit's husk.
Distribution
Durio species are native to Southeast Asia. Durio zibethinus is the sole species traded on the international market; the other edible species — including D. graveolens, D. dulcis, and D. testudinarius — are sold only within their local regions.
Taxonomy Notes
Durio was historically placed in Bombacaceae owing to its monothecate anthers, a configuration unusual among mallows. Molecular studies subsequently moved tribe Durioneae into subfamily Helicteroideae of the expanded Malvaceae. Durio sensu stricto (24 species) is closely allied to Boschia (6 species); the two are vegetatively indistinguishable but differ in anther dehiscence (longitudinal slits in Durio vs. apical pores in Boschia). Together with Cullenia, these three genera form a clade sister to the rest of Helicteroideae.
Cultural Uses
The durian is considered the "king of fruits" across much of Southeast Asia and holds deep cultural significance in the region. Its intense odour has, however, made it unwelcome in enclosed public spaces, resulting in formal bans in hotels and on public transport in several Southeast Asian countries. Only Durio zibethinus is traded internationally; other edible species remain embedded in local markets and food traditions.
