A genus of tropical plants with unusual flower arrangements, part of the family Sapindaceae.
From Greek allos (other) + aitios (cause) + anthos (flower), suggesting flowers that are different or variously arranged. Named by botanists in the 19th century.
Many plant genera names hide little botanical jokes or descriptions—Allaeanthus literally means 'differently caused flower,' referring to its quirky flower structure that's unusual compared to its relatives.
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