Trochodendrales, under Division Magnoliophyta, is a small order of angiosperms with members distributed in Southeast Asia. The Trochodendrales trees are primitive with simple leaves, no vessels, small or no stipules, and reduced perianth.
The Trochodendrales flowers are bisexual and pollinated via wind (Tetracentron) or insects (Trochodendron). The wheel tree belongs to the order Trochodendrales.
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