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 Calyx lobes acute, ⅓ to ½ as long as the calyx tube; flowers opening, chasmogamous
1 Calyx lobes obtuse, < ¼ as long as the calyx tube; flowers not opening, cleistogamous