IGCSE Biology 4th edition

Biology books by
D G Mackean

Lupin

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Lupin (Lupinus perennis)
Lupin (Lupinus perennis). Five joined sepals, with a two-lobed appearance; five petals, not all joined but of different shapes and sizes. The uppermost petal is called the standard, and the two partly joined petals at the side are the wings. Within the wings are two more, partly joined petals forming a boat-shaped keel Inside the keel are ten stamens the filaments of which are joined to form a sheath round the ovary. The ovary is long, narrow and pod-shaped. and consists of one carpel with about ten ovules. The style ends in a stigma, just within the pointed end of the keel.

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