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How do Annonaceae leaves and flowers differ from those of Magnoliaceae?
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Magnoliales
Magnolia (Magnolia fraseri).
The Annonaceae and Magnoliaceae families within the order Magnoliales exhibit distinct morphological differences in their leaves and flowers:
Leaves
- Annonaceae: The leaves are alternate and notably lack stipules; they frequently display a characteristic metallic sheen.1
- Magnoliaceae: These plants also bear alternate, smooth-margined leaves, but they are often described as thick, shining, or leathery.2
Flowers
- Annonaceae: The fragrant, often pendulous flowers typically have parts arranged in threes and frequently open before all floral parts have reached maturity. The stamens generally feature a short, stout filament with a connective expanded above the pollen sacs.1
- Magnoliaceae: The flowers are typically cuplike and fragrant, located at branch tips. They possess three sepals and six to 12 petals arranged in two to four series, with numerous spirally arranged stamens.2
While both families are part of the same order, these structural variations in floral arrangement and leaf anatomy help distinguish the two groups.12