A taxonomic <xref>family</xref> within the <xref>order</xref> <xref>Sapindales</xref> — including amongst others the <xref>horse-chestnuts</xref>; treated under <xref>APG II</xref> as a subfamily of <xref>Sapindaceae</xref>, <xref>Hippocastanoideae</xref>.
User Defined Definitions
"trees having showy flowers and inedible nutlike seeds in a leathery capsule"