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.
1 Flowering stem leafless above the first branch; corollas blue or white; [plant a perennial native, not weedy] | |
1 Flowering stem with leaves above the first inflorescence branch; corollas blue, pink, or reddish-purple; [plant a biennial exotic, weedy] | |