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The parts of a bipinnate leaf
A bipinnate leaf is pinnately compound but the leaflets are further divided into pinnule. The rachis is the main stalk of the compound leaf. The stalk below the first leaflets is the petiole of the leaf.
This picture shows the rachis, petiole and binnate leaflet of a bipinnate compound leaf. The leaf is from China Doll (Radermacha)
This picture shows pinnule, rachis and the petiole of a bipinnate leaf.
This plant is a Silk Oak (Grevillia robusta), The leaf is divided into 26 leaflets. Each leaflet is further divided. Red arrow is pointing to a leaflet.
 
 
 
 
 
 
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