Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

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Key to Trapa

Lythraceae

Trapa

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(c) Clark, Jeff - CC-BY
1 Fruit 2-horned; fruit crown absent; leaf lower surface reddish or green; petals pink
(c) Powell, Eric M - CC-BY-NC, permission granted to NCBG
1 Fruit 4-horned; fruit crown prominent; leaf lower surface green; petals white