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.

Key to Cheilanthes

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1 Leaves mostly 1-2-pinnate, broadly deltate-triangular in outline
1 Leaves mostly 2-3-pinnate, lanceolate or narrowly triangular in outline