Illustration from 1911 Encyclopædia Britannica, article BROOM.

Original caption: Cytisus scoparius, Common Broom.

1. Two-lipped calyx.

2. Broadly ovate vexillum or standard.

3. One of the alae or wings of the corolla.

4. Carina or keel.

5. Monadelphous stamens.

6. Hairy ovary with the long style, thickened upwards, and spirally curved.

7. Legume or pod.

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