Allosidastrum

{{Short description|Genus of flowering plants}}

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| taxon = Allosidastrum

| authority = (Hochr.) Krapov., Fryxell & D.M.Bates{{cite POWO |title=Allosidastrum |id=925353-1 |access-date=4 October 2022}}{{IPNI |id=925353-1 |taxon=Allosidastrum |access-date=4 October 2022}}

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Allosidastrum is a New World genus comprising four species in the tribe Malveae in the family Malvaceae.{{Cite journal |last=Krapovickas |first=Antonio |last2=Fryxell |first2=Paul A. |last3=Bates |first3=David M. |date=1988-12-15 |title=Allosidastrum, un nuevo género de Malvaceae de los neotrópicos |trans-title=Allosidastrum, a new genus of Malvaceae of the Neotropics |language=es |url=https://www.botanicalsciences.com.mx/index.php/botanicalSciences/article/view/1343 |journal=Botanical Sciences |issue=48 |pages=23–34 |doi=10.17129/botsci.1343 |issn=2007-4476|doi-access=free }} Members of the genus are woody, bearing ovate leaves with long petioles. Flowers - borne without calyculi - bear small, basally rounded calyxes of a length greater than that of their pedicels and whitish or palely yellow petals. Gynoeciums each consist of five to nine carpels and mature into fruits that yield one seed for each of their carpels.