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Bombacoideae is a subfamily of the mallow family, Malvaceae. It contains herbaceous and woody plants. Their leaves are alternate, commonly palmately lobed, with small and caducous stipules. Flowers are hermaphroditic and actinomorphic; the calyx has 5 sepals united at the base, "NOT" accompanied by an epicalyx (involucel). The corolla has 5 free petals and an androecium of numerous stamens, typically with free filaments "NOT" fused in a staminal tube (column). The pollen is smooth and the ovary superior and pluricarpellate. Fruits are schizocarpous or capsular.
|Cortex of juvenile Ceiba pentandra|
Some taxa in this subfamily were previously grouped under the now-obsolete family Bombacaceae as recent phylogenetic research has shown that Bombacaceae as traditionally circumscribed (including tribe Durioneae) is not a monophyletic group. Camptostemon, Lagunaria, Pentaplaris and Uladendron might more appropriately be placed in Malvoideae as might the tribe Matisieae (Matisia, Phragmotheca and Quararibea).
- "GRIN Genera of Malvaceae subfam. Bombacoideae". Germplasm Resources Information Network. United States Department of Agriculture. Retrieved 2017-07-22.