Sapindales: order of flowering plants

Characteristics

Plants in this order display a variety of forms but share a few recurring traits: many are trees or shrubs, leaves are often compound or pinnate, and flowers may be small and clustered or showy depending on the lineage. Many families contain aromatic oils or resin canals (notably citrus and Burseraceae). Fruit types are diverse — for example, winged samaras in maples, fleshy drupes in mango and cashew, and specialized fleshy arils around seeds in lychee and rambutan.

Major families and representative plants

• Citrus and relatives (Rutaceae) — oranges, lemons and other citrus fruits grown worldwide.
• Maples (Sapindaceae in modern treatments) — temperate trees known for palmate leaves and samara fruits.
• Lychee and rambutan (Sapindaceae) — tropical fruits with an arillate seed.
• Mango and cashew (Anacardiaceae) — important edible fruits and nuts; some species produce irritant compounds in their sap.
• Frankincense and myrrh (Burseraceae) — trees tapped for aromatic resins used historically and ceremonially.
• Mahogany (Meliaceae) — valued tropical timber species.

Distribution and evolutionary context

Sapindales are most diverse in tropical and subtropical regions, although important temperate members occur in cooler zones. The group has an ancient origin and has been reshaped by both fossil discoveries and DNA-based phylogenies; these studies have clarified relationships among families and genera and guided the modern circumscription of the order.

Economic and ecological importance

Members of Sapindales supply major food crops, timber, ornamental trees and commercially important resins. Citrus fruits are central to global agriculture; mangoes and cashews are staple tropical crops; frankincense and myrrh have long cultural and commercial value; mahogany and related timbers are important in forestry and cabinetmaking. Ecologically, these plants occupy key roles from forest canopies to cultivated landscapes.

Notable distinctions

The order is notable for its diversity of fruit and seed adaptations, its frequent production of aromatic compounds and resins, and its mixture of tropical and temperate lineages. Taxonomic boundaries have shifted as genetic evidence refines family limits, but Sapindales remains a recognised and economically significant grouping within flowering plants.