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 Heads with evident white rays (very rarely lacking rays); plant chamomile-scented; disc flowers 5-lobed|
1 Heads discoid (lacking rays); plant pineapple-scented; disc flowers 4-lobed